Quadradisc Technics

by Panasonic

JVCI I tCi l

A discrete point of view about the quadraphonic evolution

PnnlOCf in Japan reg 6060B

HANDBOOK

Its time to choose again To the audio industrys great credit critical choices made during the astonishing evolution of high fidelity sound have always been made using uncompromised accuracy of reproduction and greatest creative flexibility as the final standards of judgement The first saleable home equipment for instance was big and bulkymdasha difficult marketing problem to say (he least But that was the only way the industry knew how to provide uncompromised state-of-the-art accuracy and greatest creative flexibility-so big and bulky it was

When it inevitably came time to choose a single industry method of producing a stereo disc the system chosen represented the greatest possibility for utmost accuracy and flexibility through two totally separshyate channels with the lowest crosstalk of information between them Once that decision was made stereo soon became a household word everywhere

Now quadraphonic sound has truly come of age Hardware production and sales are riding a conshysistently increasing sales curve Quadraphonic software re leases and sales are paralleling that curve New technological advances are occurring almost daily

The time has come once more for the sound industry to make another evolutionary decisionmdashto what quadraphonic disc system should its combined technological and marketshying efforts be directed

It is a decision that should be made as quickly as possible for the benefit of producer retailer and consumer alike A decision that will inevitably detershymine the future course of high fidelity sound reproduction

Thats basically why weve put this book together Wed like you the concernshyed individual wholl be directly affected by that decision to fully undershystand what we believe that choice must be the CD-4 Compatible Discrete 4-channel disc systemmdash the Quadradisc Why Because Quadradisc is the only genuine 4-channel disc system Because no other system offers the pure accuracy ol reproshyduction and vast creative flexibility of Quadradisc And its just as simple as that

We invite you to step into the world of the CD-4 Quadradisc Read about it learn about it listen to it Then critically compare it to any of the other proshyposed systems

It history means anything at all Quadradisc will become the key that opens up the next great dimenshysion in sound

IIhere its at | PAGES 3 5 Just (or the r e c o r d A quick look at the disc from Thomas A to present day

| PAGES 6 9 The q u a d r a p h o n i c multiple c h o i c e g a m e The quad disc systems and how they basically work

| PAGES 10 ^-11 Will the real 4 - c h a n n e l d i s c p l e a s e s tand u p A closer look at the CD-4 Quadradisc

| PAGE 12 Gett ing hooked on CD-4 What you need and how Its connected

| PAGE 13 C D - 4 i s in the a i r A bit about quadraphonic FM

f PAGE 14 S u g g e s t e d s p e a k e r p lacement for C D - 4 l is ten ing

PAGES 15- 16 I ve a l r e a d y c h o s e n Some choice words from people who already know

| PAGE 17 T h e C D - 4 roster The people who make the equipment youll use

f PAGES 1 8 - 2 0 The s o u n d on CD-4 Quadradisc artists and albums

f mdash PAGES 21 - 2 2 C o m i n g to terms with q u a d r a p h o n i c A glossary ot quadraphonic terminology

fmmmgt PAGES 23 24 Q amp A X4 Most commonly asked quesshytions and answers about the 4-channel situation

| PAGE 25 More about C D - 4 Where to get the latest information

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Just for the record

Like any developing thing Edisons amazing little cylinder was destined lo go through a lot of changes First it was flattened into a disc made ot wax This provided a much easier reshycording medium to work with and eliminated much of the background noise inherent in the cylinder Wax soon gave way to the durability ot shel lac and the 78 RPM record Grandma used to play on her windup w a s born

Then came microgroove Now an entire symphony could be recorded on one disc with far bettor fidelity than ever before Equipment manushyfacturers quickly created mechanical and electronic

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gear equal to the task The L P ushered in the era of high fidelity The 45 RPM single play doughnut made its entrance in the early fifties and hundreds of musical performers rose to starshydom or melted into obshyscurity on its revolutions But the next real milestone in the art of sound reshyproduction was the creashytion of a thing called

stereo Up until then everything was recorded on a single track and played back through a single channelmdashjust a s though you had only one oar But with the development of multi-track tape equipment sound was no longer limitshyed by the unavoidable flatness of monaural reshyproduction The ability to record and reproduce 2-channel source material raised the curtain on an immensely wider stago of musical realism and creativity

Yet stereo sound didnt make its big impact until a stereo disc system was standardshyized The stereo LP with a totally separate channel

pressed into each wall of its liny grooves was a great new tool for creative techshynician and artist alike Multishychannel recording techniques provided far greater accuracy and depth in the final 2-chanshynel master New disc raw materials and pressing techshyniques were developed that increased durability expandshyed frequency response and assured the kind ol complete channel separation necesshysary for each speaker to reproduce a proper sound field FM stations rapidly adapted to stereo multiplex broadcastingmdasha system in which two separate chanshynels are sent out on the carrier and sub-carrier of a radio wave Equipment manufacturers once again rose to the occasion and a whole range of home gear designed to take full fidelity advantage of the higher quality source material soon appeared on the shelves of the local hi-fi store After a few years of learning what this new tool could do the technician and the artist formed a creative alliance that turned on the world to a two-earod era of electronic imagination It was the birth

ol a musical dimension that only the alliance of artistry and technology could have fostered

Today another dimensional word has burst into the world ol sound Quadraphonic 4-channel sound Sound that surrounds Sound that lifts the listener up and drops him right in the middle of things Sound with a whole new experience of involveshyment Sound that many exshyperts believe is a greater advancement over stereo than stereo was over monaural

But there was an intrinsic problem with quadraphonic sound reproduction With tape everything was easy Simply record four separate channels on the tape and play It back through four separate channelsmdashIhe discrete recording process now being used on quadrashyphonic tapes and cartridges But what about the prime vehicle of sound for the home listenermdashthe record There were only two walls on the groove and quadrashyphonic sound demanded four channels of information

Not even the fertile and visionary mind ot Thomas Alva Edison could have imagined the full scope of what hed started when he first captured sound on a tiny tin foil cylinder In less than a single cnnlury that initial permanent record of sound reached the c a r s of the world and changed the life style ot its people It became the sound of an ever-expanding industry from which millions make their living The sound of the rich gift ot music and entertainment we find at our fingertips today

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The lirsl and simplest solushytion was to take tour chanshynels ot recorded material scramble it in a predictable pattern Into two channels then unscramble it Into four channels again with special electronic circuitry in the playback equipment This matrix method worked to a degree The enhancement it provided to otherwise straight stereo source material was clearly audible and as a stereo enhancer matrix 4-channel reproducshytion should provide the home listener with a lot of musical pleasure in the future But even with the best electronic matrix unscram-blers ever devised someshything was always lost in the 4-2-4 translation The result was loss of the defined separation necessary for accurate reproduction ol the 4-channel master tape The only real solution was to find a way to put lour totally isolated complelely sepashyrate channels on an LP disc Somehow

The idea captured the fancy ol a team of Japanese engineers Unable to resist the challenge they put their

full efforts behind the masshysive research and developshyment program it takes to meet that kind of challenge Using compatibility (ability to perform equally as well on stereo equipment with ihe equivalent durability ol a stereo record) and discreteness the maximum separation of Information on each of the four channels)as their basic standards of performance evaluation they developed the revolutionary CD-4 Quadradisc CD-4 means Compatibility and Discreteness on all 4 chanshynels The first and only quadraphonic system that combines uncompromised accuracy of reproduction and unlimited creative flexishybility on a disc Now its inevitable

The sound of the future will have four sides CD-4 welcomes you to all of them

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The quadraphonic multiple choice game Whatever initials you

christen them with there are basically only two quadrashyphonic disc systems on the marketmdashmatrix and discrete Matrix systems may be SQ QS or in some other form The only discrete system is CD-4 Each has its own philosophy

and approach to 4-channel sound reproduction And each has certain advantages and disadvantages But before any valid comparison can be made a firm understanding of the basic techniques of each system is an absolute must We offer the following capsulized descriptions and detailed illustrations towards that end

Recording 4 Channel

Encoding Matrix Record Decoding 2 Channels

Playback A Channels

Mixed sound after intershychange over each channel

Four channels ol discrete Information are mixed (encoded) Into two channels ihon unmixed (decoded) into tour-channels during playback Note ihe lane changing ot information thai ineviiably occurs during the 4 - 2 - 4 process

Recording 4-Channels

Modulating CD-4 flecod Demodulaimg 4 Channels

Playbaefc A Channels

Pure and unmixed sound from start to finish By recording the sum ot front and rear channels in the audible region and the dilforence between Iron and rear channels as modulated FM signals in the 20 - 45 kHz region tour discrete channels can bo maintained Irom master tape to loudshyspeakersmdashyet remain tully compatible with mono or stereo playback equipment

The 4-2-4 Matrix system

The 4-4-4 Discrete System

T h e Malr ix S y s t e m In theory the matrix system appears to be the simplest and most logical approach to the quadraphonic disc Just take lour separate channels ot information electronically scramble them together in a predetermined pattern or matrix and put this 2-chanshynel matrix on a standard sloroo disc Then all you had to do was develop a device that could decode that matrix during playback and restore the sound as closely a s possible to the

four discrete tracks of the original master lape

Sounds easy enough No major changes necessary in record material cutting and pressing techniques or FM broadcasting Just some extra electronic circuitry four speakers and you were ready for the quadraphonic record

But one problemmdashand apparently an unsolvable onemdashflaws the matrix theory Once those four original

discrote channels are mixed together there is no known way to recover them exactly as they were What happens during the 4-2-4 process is a blendshying of information between channels sometimes to the point where some channels becomo nearly indistinguishshyable Irom others This mingling ol inlormation is called crosstalk and the result is varying degrees of separation loss

Unfortunately even the bost matrix decoders with soshyphisticated phase shift and logic Circuitry cant prevent crosstalk nor can they provide the kind ot channel separation weve come to expect from stereo A decent stereo system has channel separation of around 20-25 dB But unless your matrix quadraphonic home equipment has full logic circuitry (and less than 20 ot the products made today do) channel separation can drop to as low as 3 dB during the matrix decoding process

Ericooing M a t laquo Record Decoding with 2 Channel Logic Circuitry

Playback 4 Channels

Thats very c lose to being monaural sound and far less than necessary for acceptshyable reproduction of the quadraphonic sound fields portrayed on 4-channel masters Where tho matrix system really shines however is in its ability to enhance

standard stereo records Anyone whos heard their favorite stereo LP played through a good matrix system will testify to that For that reason alone its an advantage to have matrix circuitry in your quadraphonic playback equipment

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T h e D i s c r e t e S y s t e m The discrete approach to the quadraphonic disc represhysented an entirely different point of view right from the beginning Unwilling to accept the limitations of existing technology discrete-devoted engineers recognizshyed the pure necessity of four completely separate channels on a d iscmdashand then set out to produce one

First they looked at the signal being put on the standard 45-45 stereo record groovemdashup to 18000 Hertz

on better records But why they reasoned must that be the uppor limit Available techniques permitted pressing up to 45000 Hertz on the groove wall Cartridge technology w a s such that a cartridge could be produced that would accurately track at such frequencies and higher

Then why not record the sum of front and rear channels In the normal audible region and the difference between front and rear channels as ultrasonic modulated FM

signals up in the 20-45000 Hz region That way the resulting disc would bo fully compatible with existing stereo equipment yet provide four totally discrete channels of information with the proper playback equipment Since the two signals are so far apart in the frequency spectrum Ihe possibility of interference would be eliminated

Then all that was needed was some good FM demodulation circuitry in the playback equipmentmdashthe kind thats

CD-4 Recording and Playback Processes CD-4 Record

2-channel Playback CD -4 Rcf or a

U + U - L

4-channel Pluyback CD-4 i- - bull

Rocordmg 4 Channel

Demodulating

fa + L H laquo U zMmjf

tU t U r j t V - U ) _ u

|R +Bal + (B) - B raquo ) _ bdquo r

M o d u l a t i o n

Source Recording Proceaa

been used in FM stereo multiplexing for yearsmdashand a stylus capable of delivershying the ultrasonic frequency response required

Utilizing this new concept the artist engineer and record producer would for the first time be able to use

the unlimited creative freeshydom afforded through the discrete channel mediummdash and the listener would be able to hear everything thai creative freedom had to offer with absolute accuracymdashall In an amazing new disc

The result was Quadradisc

Mill the real 4-channel disc please stand up A lot ol new developments had to take placo betore the CD-4 discrete Quadradisc process could become a viable concept in the quadrashyphonic marketplace A tribute to todays audio technology all of those necshyessary developments have

A Matrix Quadraphonic Sound Field

been accomplished with the uncompromising concern for accuracy and artistic freedom that has been the very foundation ot the discrete disc philosophy

One of the basic requireshyments of the Quadradisc for

instance was to provide the consumer with a product that had at least equivalent durability and performance life ol its stereo counterpart Record companies soon came up with new materials that were significantly harder with lower noise characteristics

(a) A direct sound may bo assigned to a single chennt while the remaining three may bo usod lor ils natural ambience Since crosstalk is absent in the discrete system the etfecl is totally accurate

(n) Panning (Ihe ability lo move tho location ol a sound within the sound field) Is possible In any directionmdash even overhead Absence of crosstalk makes Ihoso movements as clear and precise as the original 4-channel master tape

(c) Tho stago-hall relationshyshipmdash particularly important in classical musicmdashremains pure and uncolored because of discreteness The orcheshystra always remains up Iront while rear speakers provide necessary natural ambience

(d) A soloisl can be placed In the center ol the room while four totally separate instruments or groups of instruments appear in each cornermdasha unique discroto listening experience

Quadradisc Effects Some illustrations of me effect iioxibiiily and accuracy possible only with Quadradisc

Tho Quadraphonic Sound Field A clear look at the typo ol sound fields created by discrete and matrix systems Diagram A represents the exact sound field produced by Ihe original 4-channol master tape Diagram B shows tho crosstalk inevitable in a matrix system

A Discroto Quadraphonic Sound Field

than ever before possible This new Quadradisc compound actually adds to performance longevity up to 50 and will soon be used for producing top quality stereo records Several cartridge manufacshyturers designed and now produce fine ultra-broadband cartridges fully capable of reaching the upper limits Of

the quadradiscmdashand beyond A whole new shape in styl imdash the Shibata typemdashwas conshyceived and perfected This new super-stylus meant greatly increased frequency response and significantly decreased record wear Extra-precision cutting mastering and pressing techniques were required and implementedmdashanother

quality advancement that will eventually spill over Into stereo products Demodula-lion systems were designed that deliver four discrete channels of sound equivalent in separation to some of the lines stereo recordingsmdash without adding noise or colorshyation of Its own to the signal

Ffonlviow ol ly

A new shape in styli that means greater wall area contact and ultra-sonic frequency responsemdash yet with less wear force on Ihe record than an elliptical stylus Other styli with Iho same Shibata slyius effect holaquoo boen deshyveloped

The ellecl of (racking lorce (2 grams) on a disc using a SHIshyBATA stylus

The effect ol tracking force (2 grams) on a disc using a conventional oiiiptlcal stylus

Now the CD-4 Quadradisc is the potent force it deserves to be in the audio marketshyplace Artists and producers whove used the system extol its virtues and proclaim it a creative tool destined to spawn new vistas of musical involvement More and more

record companies are producing their top talent on CD-4 Quadradiscs More and more hardware manufacturers are including CO-4 demodulation circuitry in their 4-channel products l ess and less arcopy providing Ihe more cosily full logic

matrix circuits

Will the realmdashand onlymdash 4-channel disc please stand u p

Thank you Quadradisc

Getting hooked on CD-4 Getting hooked on CD-4 is a lot easier than it may sound

Begin with a basic 4-channel playback systemmdasha good turntable a 4-channel receiver (or amplifier) and four speakers closely matched in efficiency that please your listening preferences Add to the turntable one of the many excellent cartridges designed

for CD-4 disc reproduction preferably with the Shibata or equivalent stylus Now add a CD-4 demodulator exshyternally or built into Ihe turntable or quadraphonic receiver

Now pick out some ol your favorite musical artists from Ihe evergrowing Quadradisc list Then take them home listen to them and as one Quadradisc reviewer so graphically slated hear a

sonic diamond that really sparkles I

II you havent already exshyperienced the indescribable surround of sound provided by the CD-4 Quadradisc we can only suggest that you ask your favorite hi-fi dealer to demonstrate it to you If his equipment ts properly arranged it wont take long to convince you thai were now living in the year of 19CD-4

CD-4 System Combinations The possiblo hardware combinations that let you hoar the full audio dynamics ol the Quadradisc

4 - c f i a n n o l R e c e i v e

T i l 1 Hltlll CO-4 Demodulator

4-channel receiver with external demodulator -- ha I-I bullbull Receiver with built-in CD- Demodulator

4-channel receiver with built-in demodulator

Turntable with built-in CD-4 Demodulator

4-channel Receiver

4-channel receiver with turntable containing built-in demodulator

SHIBATA Myitis

Turntable

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

Its time to choose again To the audio industrys great credit critical choices made during the astonishing evolution of high fidelity sound have always been made using uncompromised accuracy of reproduction and greatest creative flexibility as the final standards of judgement The first saleable home equipment for instance was big and bulkymdasha difficult marketing problem to say (he least But that was the only way the industry knew how to provide uncompromised state-of-the-art accuracy and greatest creative flexibility-so big and bulky it was

When it inevitably came time to choose a single industry method of producing a stereo disc the system chosen represented the greatest possibility for utmost accuracy and flexibility through two totally separshyate channels with the lowest crosstalk of information between them Once that decision was made stereo soon became a household word everywhere

Now quadraphonic sound has truly come of age Hardware production and sales are riding a conshysistently increasing sales curve Quadraphonic software re leases and sales are paralleling that curve New technological advances are occurring almost daily

The time has come once more for the sound industry to make another evolutionary decisionmdashto what quadraphonic disc system should its combined technological and marketshying efforts be directed

It is a decision that should be made as quickly as possible for the benefit of producer retailer and consumer alike A decision that will inevitably detershymine the future course of high fidelity sound reproduction

Thats basically why weve put this book together Wed like you the concernshyed individual wholl be directly affected by that decision to fully undershystand what we believe that choice must be the CD-4 Compatible Discrete 4-channel disc systemmdash the Quadradisc Why Because Quadradisc is the only genuine 4-channel disc system Because no other system offers the pure accuracy ol reproshyduction and vast creative flexibility of Quadradisc And its just as simple as that

We invite you to step into the world of the CD-4 Quadradisc Read about it learn about it listen to it Then critically compare it to any of the other proshyposed systems

It history means anything at all Quadradisc will become the key that opens up the next great dimenshysion in sound

IIhere its at | PAGES 3 5 Just (or the r e c o r d A quick look at the disc from Thomas A to present day

| PAGES 6 9 The q u a d r a p h o n i c multiple c h o i c e g a m e The quad disc systems and how they basically work

| PAGES 10 ^-11 Will the real 4 - c h a n n e l d i s c p l e a s e s tand u p A closer look at the CD-4 Quadradisc

| PAGE 12 Gett ing hooked on CD-4 What you need and how Its connected

| PAGE 13 C D - 4 i s in the a i r A bit about quadraphonic FM

f PAGE 14 S u g g e s t e d s p e a k e r p lacement for C D - 4 l is ten ing

PAGES 15- 16 I ve a l r e a d y c h o s e n Some choice words from people who already know

| PAGE 17 T h e C D - 4 roster The people who make the equipment youll use

f PAGES 1 8 - 2 0 The s o u n d on CD-4 Quadradisc artists and albums

f mdash PAGES 21 - 2 2 C o m i n g to terms with q u a d r a p h o n i c A glossary ot quadraphonic terminology

fmmmgt PAGES 23 24 Q amp A X4 Most commonly asked quesshytions and answers about the 4-channel situation

| PAGE 25 More about C D - 4 Where to get the latest information

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Just for the record

Like any developing thing Edisons amazing little cylinder was destined lo go through a lot of changes First it was flattened into a disc made ot wax This provided a much easier reshycording medium to work with and eliminated much of the background noise inherent in the cylinder Wax soon gave way to the durability ot shel lac and the 78 RPM record Grandma used to play on her windup w a s born

Then came microgroove Now an entire symphony could be recorded on one disc with far bettor fidelity than ever before Equipment manushyfacturers quickly created mechanical and electronic

O

gear equal to the task The L P ushered in the era of high fidelity The 45 RPM single play doughnut made its entrance in the early fifties and hundreds of musical performers rose to starshydom or melted into obshyscurity on its revolutions But the next real milestone in the art of sound reshyproduction was the creashytion of a thing called

stereo Up until then everything was recorded on a single track and played back through a single channelmdashjust a s though you had only one oar But with the development of multi-track tape equipment sound was no longer limitshyed by the unavoidable flatness of monaural reshyproduction The ability to record and reproduce 2-channel source material raised the curtain on an immensely wider stago of musical realism and creativity

Yet stereo sound didnt make its big impact until a stereo disc system was standardshyized The stereo LP with a totally separate channel

pressed into each wall of its liny grooves was a great new tool for creative techshynician and artist alike Multishychannel recording techniques provided far greater accuracy and depth in the final 2-chanshynel master New disc raw materials and pressing techshyniques were developed that increased durability expandshyed frequency response and assured the kind ol complete channel separation necesshysary for each speaker to reproduce a proper sound field FM stations rapidly adapted to stereo multiplex broadcastingmdasha system in which two separate chanshynels are sent out on the carrier and sub-carrier of a radio wave Equipment manufacturers once again rose to the occasion and a whole range of home gear designed to take full fidelity advantage of the higher quality source material soon appeared on the shelves of the local hi-fi store After a few years of learning what this new tool could do the technician and the artist formed a creative alliance that turned on the world to a two-earod era of electronic imagination It was the birth

ol a musical dimension that only the alliance of artistry and technology could have fostered

Today another dimensional word has burst into the world ol sound Quadraphonic 4-channel sound Sound that surrounds Sound that lifts the listener up and drops him right in the middle of things Sound with a whole new experience of involveshyment Sound that many exshyperts believe is a greater advancement over stereo than stereo was over monaural

But there was an intrinsic problem with quadraphonic sound reproduction With tape everything was easy Simply record four separate channels on the tape and play It back through four separate channelsmdashIhe discrete recording process now being used on quadrashyphonic tapes and cartridges But what about the prime vehicle of sound for the home listenermdashthe record There were only two walls on the groove and quadrashyphonic sound demanded four channels of information

Not even the fertile and visionary mind ot Thomas Alva Edison could have imagined the full scope of what hed started when he first captured sound on a tiny tin foil cylinder In less than a single cnnlury that initial permanent record of sound reached the c a r s of the world and changed the life style ot its people It became the sound of an ever-expanding industry from which millions make their living The sound of the rich gift ot music and entertainment we find at our fingertips today

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The lirsl and simplest solushytion was to take tour chanshynels ot recorded material scramble it in a predictable pattern Into two channels then unscramble it Into four channels again with special electronic circuitry in the playback equipment This matrix method worked to a degree The enhancement it provided to otherwise straight stereo source material was clearly audible and as a stereo enhancer matrix 4-channel reproducshytion should provide the home listener with a lot of musical pleasure in the future But even with the best electronic matrix unscram-blers ever devised someshything was always lost in the 4-2-4 translation The result was loss of the defined separation necessary for accurate reproduction ol the 4-channel master tape The only real solution was to find a way to put lour totally isolated complelely sepashyrate channels on an LP disc Somehow

The idea captured the fancy ol a team of Japanese engineers Unable to resist the challenge they put their

full efforts behind the masshysive research and developshyment program it takes to meet that kind of challenge Using compatibility (ability to perform equally as well on stereo equipment with ihe equivalent durability ol a stereo record) and discreteness the maximum separation of Information on each of the four channels)as their basic standards of performance evaluation they developed the revolutionary CD-4 Quadradisc CD-4 means Compatibility and Discreteness on all 4 chanshynels The first and only quadraphonic system that combines uncompromised accuracy of reproduction and unlimited creative flexishybility on a disc Now its inevitable

The sound of the future will have four sides CD-4 welcomes you to all of them

O

The quadraphonic multiple choice game Whatever initials you

christen them with there are basically only two quadrashyphonic disc systems on the marketmdashmatrix and discrete Matrix systems may be SQ QS or in some other form The only discrete system is CD-4 Each has its own philosophy

and approach to 4-channel sound reproduction And each has certain advantages and disadvantages But before any valid comparison can be made a firm understanding of the basic techniques of each system is an absolute must We offer the following capsulized descriptions and detailed illustrations towards that end

Recording 4 Channel

Encoding Matrix Record Decoding 2 Channels

Playback A Channels

Mixed sound after intershychange over each channel

Four channels ol discrete Information are mixed (encoded) Into two channels ihon unmixed (decoded) into tour-channels during playback Note ihe lane changing ot information thai ineviiably occurs during the 4 - 2 - 4 process

Recording 4-Channels

Modulating CD-4 flecod Demodulaimg 4 Channels

Playbaefc A Channels

Pure and unmixed sound from start to finish By recording the sum ot front and rear channels in the audible region and the dilforence between Iron and rear channels as modulated FM signals in the 20 - 45 kHz region tour discrete channels can bo maintained Irom master tape to loudshyspeakersmdashyet remain tully compatible with mono or stereo playback equipment

The 4-2-4 Matrix system

The 4-4-4 Discrete System

T h e Malr ix S y s t e m In theory the matrix system appears to be the simplest and most logical approach to the quadraphonic disc Just take lour separate channels ot information electronically scramble them together in a predetermined pattern or matrix and put this 2-chanshynel matrix on a standard sloroo disc Then all you had to do was develop a device that could decode that matrix during playback and restore the sound as closely a s possible to the

four discrete tracks of the original master lape

Sounds easy enough No major changes necessary in record material cutting and pressing techniques or FM broadcasting Just some extra electronic circuitry four speakers and you were ready for the quadraphonic record

But one problemmdashand apparently an unsolvable onemdashflaws the matrix theory Once those four original

discrote channels are mixed together there is no known way to recover them exactly as they were What happens during the 4-2-4 process is a blendshying of information between channels sometimes to the point where some channels becomo nearly indistinguishshyable Irom others This mingling ol inlormation is called crosstalk and the result is varying degrees of separation loss

Unfortunately even the bost matrix decoders with soshyphisticated phase shift and logic Circuitry cant prevent crosstalk nor can they provide the kind ot channel separation weve come to expect from stereo A decent stereo system has channel separation of around 20-25 dB But unless your matrix quadraphonic home equipment has full logic circuitry (and less than 20 ot the products made today do) channel separation can drop to as low as 3 dB during the matrix decoding process

Ericooing M a t laquo Record Decoding with 2 Channel Logic Circuitry

Playback 4 Channels

Thats very c lose to being monaural sound and far less than necessary for acceptshyable reproduction of the quadraphonic sound fields portrayed on 4-channel masters Where tho matrix system really shines however is in its ability to enhance

standard stereo records Anyone whos heard their favorite stereo LP played through a good matrix system will testify to that For that reason alone its an advantage to have matrix circuitry in your quadraphonic playback equipment

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T h e D i s c r e t e S y s t e m The discrete approach to the quadraphonic disc represhysented an entirely different point of view right from the beginning Unwilling to accept the limitations of existing technology discrete-devoted engineers recognizshyed the pure necessity of four completely separate channels on a d iscmdashand then set out to produce one

First they looked at the signal being put on the standard 45-45 stereo record groovemdashup to 18000 Hertz

on better records But why they reasoned must that be the uppor limit Available techniques permitted pressing up to 45000 Hertz on the groove wall Cartridge technology w a s such that a cartridge could be produced that would accurately track at such frequencies and higher

Then why not record the sum of front and rear channels In the normal audible region and the difference between front and rear channels as ultrasonic modulated FM

signals up in the 20-45000 Hz region That way the resulting disc would bo fully compatible with existing stereo equipment yet provide four totally discrete channels of information with the proper playback equipment Since the two signals are so far apart in the frequency spectrum Ihe possibility of interference would be eliminated

Then all that was needed was some good FM demodulation circuitry in the playback equipmentmdashthe kind thats

CD-4 Recording and Playback Processes CD-4 Record

2-channel Playback CD -4 Rcf or a

U + U - L

4-channel Pluyback CD-4 i- - bull

Rocordmg 4 Channel

Demodulating

fa + L H laquo U zMmjf

tU t U r j t V - U ) _ u

|R +Bal + (B) - B raquo ) _ bdquo r

M o d u l a t i o n

Source Recording Proceaa

been used in FM stereo multiplexing for yearsmdashand a stylus capable of delivershying the ultrasonic frequency response required

Utilizing this new concept the artist engineer and record producer would for the first time be able to use

the unlimited creative freeshydom afforded through the discrete channel mediummdash and the listener would be able to hear everything thai creative freedom had to offer with absolute accuracymdashall In an amazing new disc

The result was Quadradisc

Mill the real 4-channel disc please stand up A lot ol new developments had to take placo betore the CD-4 discrete Quadradisc process could become a viable concept in the quadrashyphonic marketplace A tribute to todays audio technology all of those necshyessary developments have

A Matrix Quadraphonic Sound Field

been accomplished with the uncompromising concern for accuracy and artistic freedom that has been the very foundation ot the discrete disc philosophy

One of the basic requireshyments of the Quadradisc for

instance was to provide the consumer with a product that had at least equivalent durability and performance life ol its stereo counterpart Record companies soon came up with new materials that were significantly harder with lower noise characteristics

(a) A direct sound may bo assigned to a single chennt while the remaining three may bo usod lor ils natural ambience Since crosstalk is absent in the discrete system the etfecl is totally accurate

(n) Panning (Ihe ability lo move tho location ol a sound within the sound field) Is possible In any directionmdash even overhead Absence of crosstalk makes Ihoso movements as clear and precise as the original 4-channel master tape

(c) Tho stago-hall relationshyshipmdash particularly important in classical musicmdashremains pure and uncolored because of discreteness The orcheshystra always remains up Iront while rear speakers provide necessary natural ambience

(d) A soloisl can be placed In the center ol the room while four totally separate instruments or groups of instruments appear in each cornermdasha unique discroto listening experience

Quadradisc Effects Some illustrations of me effect iioxibiiily and accuracy possible only with Quadradisc

Tho Quadraphonic Sound Field A clear look at the typo ol sound fields created by discrete and matrix systems Diagram A represents the exact sound field produced by Ihe original 4-channol master tape Diagram B shows tho crosstalk inevitable in a matrix system

A Discroto Quadraphonic Sound Field

than ever before possible This new Quadradisc compound actually adds to performance longevity up to 50 and will soon be used for producing top quality stereo records Several cartridge manufacshyturers designed and now produce fine ultra-broadband cartridges fully capable of reaching the upper limits Of

the quadradiscmdashand beyond A whole new shape in styl imdash the Shibata typemdashwas conshyceived and perfected This new super-stylus meant greatly increased frequency response and significantly decreased record wear Extra-precision cutting mastering and pressing techniques were required and implementedmdashanother

quality advancement that will eventually spill over Into stereo products Demodula-lion systems were designed that deliver four discrete channels of sound equivalent in separation to some of the lines stereo recordingsmdash without adding noise or colorshyation of Its own to the signal

Ffonlviow ol ly

A new shape in styli that means greater wall area contact and ultra-sonic frequency responsemdash yet with less wear force on Ihe record than an elliptical stylus Other styli with Iho same Shibata slyius effect holaquoo boen deshyveloped

The ellecl of (racking lorce (2 grams) on a disc using a SHIshyBATA stylus

The effect ol tracking force (2 grams) on a disc using a conventional oiiiptlcal stylus

Now the CD-4 Quadradisc is the potent force it deserves to be in the audio marketshyplace Artists and producers whove used the system extol its virtues and proclaim it a creative tool destined to spawn new vistas of musical involvement More and more

record companies are producing their top talent on CD-4 Quadradiscs More and more hardware manufacturers are including CO-4 demodulation circuitry in their 4-channel products l ess and less arcopy providing Ihe more cosily full logic

matrix circuits

Will the realmdashand onlymdash 4-channel disc please stand u p

Thank you Quadradisc

Getting hooked on CD-4 Getting hooked on CD-4 is a lot easier than it may sound

Begin with a basic 4-channel playback systemmdasha good turntable a 4-channel receiver (or amplifier) and four speakers closely matched in efficiency that please your listening preferences Add to the turntable one of the many excellent cartridges designed

for CD-4 disc reproduction preferably with the Shibata or equivalent stylus Now add a CD-4 demodulator exshyternally or built into Ihe turntable or quadraphonic receiver

Now pick out some ol your favorite musical artists from Ihe evergrowing Quadradisc list Then take them home listen to them and as one Quadradisc reviewer so graphically slated hear a

sonic diamond that really sparkles I

II you havent already exshyperienced the indescribable surround of sound provided by the CD-4 Quadradisc we can only suggest that you ask your favorite hi-fi dealer to demonstrate it to you If his equipment ts properly arranged it wont take long to convince you thai were now living in the year of 19CD-4

CD-4 System Combinations The possiblo hardware combinations that let you hoar the full audio dynamics ol the Quadradisc

4 - c f i a n n o l R e c e i v e

T i l 1 Hltlll CO-4 Demodulator

4-channel receiver with external demodulator -- ha I-I bullbull Receiver with built-in CD- Demodulator

4-channel receiver with built-in demodulator

Turntable with built-in CD-4 Demodulator

4-channel Receiver

4-channel receiver with turntable containing built-in demodulator

SHIBATA Myitis

Turntable

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

0

Just for the record

Like any developing thing Edisons amazing little cylinder was destined lo go through a lot of changes First it was flattened into a disc made ot wax This provided a much easier reshycording medium to work with and eliminated much of the background noise inherent in the cylinder Wax soon gave way to the durability ot shel lac and the 78 RPM record Grandma used to play on her windup w a s born

Then came microgroove Now an entire symphony could be recorded on one disc with far bettor fidelity than ever before Equipment manushyfacturers quickly created mechanical and electronic

O

gear equal to the task The L P ushered in the era of high fidelity The 45 RPM single play doughnut made its entrance in the early fifties and hundreds of musical performers rose to starshydom or melted into obshyscurity on its revolutions But the next real milestone in the art of sound reshyproduction was the creashytion of a thing called

stereo Up until then everything was recorded on a single track and played back through a single channelmdashjust a s though you had only one oar But with the development of multi-track tape equipment sound was no longer limitshyed by the unavoidable flatness of monaural reshyproduction The ability to record and reproduce 2-channel source material raised the curtain on an immensely wider stago of musical realism and creativity

Yet stereo sound didnt make its big impact until a stereo disc system was standardshyized The stereo LP with a totally separate channel

pressed into each wall of its liny grooves was a great new tool for creative techshynician and artist alike Multishychannel recording techniques provided far greater accuracy and depth in the final 2-chanshynel master New disc raw materials and pressing techshyniques were developed that increased durability expandshyed frequency response and assured the kind ol complete channel separation necesshysary for each speaker to reproduce a proper sound field FM stations rapidly adapted to stereo multiplex broadcastingmdasha system in which two separate chanshynels are sent out on the carrier and sub-carrier of a radio wave Equipment manufacturers once again rose to the occasion and a whole range of home gear designed to take full fidelity advantage of the higher quality source material soon appeared on the shelves of the local hi-fi store After a few years of learning what this new tool could do the technician and the artist formed a creative alliance that turned on the world to a two-earod era of electronic imagination It was the birth

ol a musical dimension that only the alliance of artistry and technology could have fostered

Today another dimensional word has burst into the world ol sound Quadraphonic 4-channel sound Sound that surrounds Sound that lifts the listener up and drops him right in the middle of things Sound with a whole new experience of involveshyment Sound that many exshyperts believe is a greater advancement over stereo than stereo was over monaural

But there was an intrinsic problem with quadraphonic sound reproduction With tape everything was easy Simply record four separate channels on the tape and play It back through four separate channelsmdashIhe discrete recording process now being used on quadrashyphonic tapes and cartridges But what about the prime vehicle of sound for the home listenermdashthe record There were only two walls on the groove and quadrashyphonic sound demanded four channels of information

Not even the fertile and visionary mind ot Thomas Alva Edison could have imagined the full scope of what hed started when he first captured sound on a tiny tin foil cylinder In less than a single cnnlury that initial permanent record of sound reached the c a r s of the world and changed the life style ot its people It became the sound of an ever-expanding industry from which millions make their living The sound of the rich gift ot music and entertainment we find at our fingertips today

0

The lirsl and simplest solushytion was to take tour chanshynels ot recorded material scramble it in a predictable pattern Into two channels then unscramble it Into four channels again with special electronic circuitry in the playback equipment This matrix method worked to a degree The enhancement it provided to otherwise straight stereo source material was clearly audible and as a stereo enhancer matrix 4-channel reproducshytion should provide the home listener with a lot of musical pleasure in the future But even with the best electronic matrix unscram-blers ever devised someshything was always lost in the 4-2-4 translation The result was loss of the defined separation necessary for accurate reproduction ol the 4-channel master tape The only real solution was to find a way to put lour totally isolated complelely sepashyrate channels on an LP disc Somehow

The idea captured the fancy ol a team of Japanese engineers Unable to resist the challenge they put their

full efforts behind the masshysive research and developshyment program it takes to meet that kind of challenge Using compatibility (ability to perform equally as well on stereo equipment with ihe equivalent durability ol a stereo record) and discreteness the maximum separation of Information on each of the four channels)as their basic standards of performance evaluation they developed the revolutionary CD-4 Quadradisc CD-4 means Compatibility and Discreteness on all 4 chanshynels The first and only quadraphonic system that combines uncompromised accuracy of reproduction and unlimited creative flexishybility on a disc Now its inevitable

The sound of the future will have four sides CD-4 welcomes you to all of them

O

The quadraphonic multiple choice game Whatever initials you

christen them with there are basically only two quadrashyphonic disc systems on the marketmdashmatrix and discrete Matrix systems may be SQ QS or in some other form The only discrete system is CD-4 Each has its own philosophy

and approach to 4-channel sound reproduction And each has certain advantages and disadvantages But before any valid comparison can be made a firm understanding of the basic techniques of each system is an absolute must We offer the following capsulized descriptions and detailed illustrations towards that end

Recording 4 Channel

Encoding Matrix Record Decoding 2 Channels

Playback A Channels

Mixed sound after intershychange over each channel

Four channels ol discrete Information are mixed (encoded) Into two channels ihon unmixed (decoded) into tour-channels during playback Note ihe lane changing ot information thai ineviiably occurs during the 4 - 2 - 4 process

Recording 4-Channels

Modulating CD-4 flecod Demodulaimg 4 Channels

Playbaefc A Channels

Pure and unmixed sound from start to finish By recording the sum ot front and rear channels in the audible region and the dilforence between Iron and rear channels as modulated FM signals in the 20 - 45 kHz region tour discrete channels can bo maintained Irom master tape to loudshyspeakersmdashyet remain tully compatible with mono or stereo playback equipment

The 4-2-4 Matrix system

The 4-4-4 Discrete System

T h e Malr ix S y s t e m In theory the matrix system appears to be the simplest and most logical approach to the quadraphonic disc Just take lour separate channels ot information electronically scramble them together in a predetermined pattern or matrix and put this 2-chanshynel matrix on a standard sloroo disc Then all you had to do was develop a device that could decode that matrix during playback and restore the sound as closely a s possible to the

four discrete tracks of the original master lape

Sounds easy enough No major changes necessary in record material cutting and pressing techniques or FM broadcasting Just some extra electronic circuitry four speakers and you were ready for the quadraphonic record

But one problemmdashand apparently an unsolvable onemdashflaws the matrix theory Once those four original

discrote channels are mixed together there is no known way to recover them exactly as they were What happens during the 4-2-4 process is a blendshying of information between channels sometimes to the point where some channels becomo nearly indistinguishshyable Irom others This mingling ol inlormation is called crosstalk and the result is varying degrees of separation loss

Unfortunately even the bost matrix decoders with soshyphisticated phase shift and logic Circuitry cant prevent crosstalk nor can they provide the kind ot channel separation weve come to expect from stereo A decent stereo system has channel separation of around 20-25 dB But unless your matrix quadraphonic home equipment has full logic circuitry (and less than 20 ot the products made today do) channel separation can drop to as low as 3 dB during the matrix decoding process

Ericooing M a t laquo Record Decoding with 2 Channel Logic Circuitry

Playback 4 Channels

Thats very c lose to being monaural sound and far less than necessary for acceptshyable reproduction of the quadraphonic sound fields portrayed on 4-channel masters Where tho matrix system really shines however is in its ability to enhance

standard stereo records Anyone whos heard their favorite stereo LP played through a good matrix system will testify to that For that reason alone its an advantage to have matrix circuitry in your quadraphonic playback equipment

O

T h e D i s c r e t e S y s t e m The discrete approach to the quadraphonic disc represhysented an entirely different point of view right from the beginning Unwilling to accept the limitations of existing technology discrete-devoted engineers recognizshyed the pure necessity of four completely separate channels on a d iscmdashand then set out to produce one

First they looked at the signal being put on the standard 45-45 stereo record groovemdashup to 18000 Hertz

on better records But why they reasoned must that be the uppor limit Available techniques permitted pressing up to 45000 Hertz on the groove wall Cartridge technology w a s such that a cartridge could be produced that would accurately track at such frequencies and higher

Then why not record the sum of front and rear channels In the normal audible region and the difference between front and rear channels as ultrasonic modulated FM

signals up in the 20-45000 Hz region That way the resulting disc would bo fully compatible with existing stereo equipment yet provide four totally discrete channels of information with the proper playback equipment Since the two signals are so far apart in the frequency spectrum Ihe possibility of interference would be eliminated

Then all that was needed was some good FM demodulation circuitry in the playback equipmentmdashthe kind thats

CD-4 Recording and Playback Processes CD-4 Record

2-channel Playback CD -4 Rcf or a

U + U - L

4-channel Pluyback CD-4 i- - bull

Rocordmg 4 Channel

Demodulating

fa + L H laquo U zMmjf

tU t U r j t V - U ) _ u

|R +Bal + (B) - B raquo ) _ bdquo r

M o d u l a t i o n

Source Recording Proceaa

been used in FM stereo multiplexing for yearsmdashand a stylus capable of delivershying the ultrasonic frequency response required

Utilizing this new concept the artist engineer and record producer would for the first time be able to use

the unlimited creative freeshydom afforded through the discrete channel mediummdash and the listener would be able to hear everything thai creative freedom had to offer with absolute accuracymdashall In an amazing new disc

The result was Quadradisc

Mill the real 4-channel disc please stand up A lot ol new developments had to take placo betore the CD-4 discrete Quadradisc process could become a viable concept in the quadrashyphonic marketplace A tribute to todays audio technology all of those necshyessary developments have

A Matrix Quadraphonic Sound Field

been accomplished with the uncompromising concern for accuracy and artistic freedom that has been the very foundation ot the discrete disc philosophy

One of the basic requireshyments of the Quadradisc for

instance was to provide the consumer with a product that had at least equivalent durability and performance life ol its stereo counterpart Record companies soon came up with new materials that were significantly harder with lower noise characteristics

(a) A direct sound may bo assigned to a single chennt while the remaining three may bo usod lor ils natural ambience Since crosstalk is absent in the discrete system the etfecl is totally accurate

(n) Panning (Ihe ability lo move tho location ol a sound within the sound field) Is possible In any directionmdash even overhead Absence of crosstalk makes Ihoso movements as clear and precise as the original 4-channel master tape

(c) Tho stago-hall relationshyshipmdash particularly important in classical musicmdashremains pure and uncolored because of discreteness The orcheshystra always remains up Iront while rear speakers provide necessary natural ambience

(d) A soloisl can be placed In the center ol the room while four totally separate instruments or groups of instruments appear in each cornermdasha unique discroto listening experience

Quadradisc Effects Some illustrations of me effect iioxibiiily and accuracy possible only with Quadradisc

Tho Quadraphonic Sound Field A clear look at the typo ol sound fields created by discrete and matrix systems Diagram A represents the exact sound field produced by Ihe original 4-channol master tape Diagram B shows tho crosstalk inevitable in a matrix system

A Discroto Quadraphonic Sound Field

than ever before possible This new Quadradisc compound actually adds to performance longevity up to 50 and will soon be used for producing top quality stereo records Several cartridge manufacshyturers designed and now produce fine ultra-broadband cartridges fully capable of reaching the upper limits Of

the quadradiscmdashand beyond A whole new shape in styl imdash the Shibata typemdashwas conshyceived and perfected This new super-stylus meant greatly increased frequency response and significantly decreased record wear Extra-precision cutting mastering and pressing techniques were required and implementedmdashanother

quality advancement that will eventually spill over Into stereo products Demodula-lion systems were designed that deliver four discrete channels of sound equivalent in separation to some of the lines stereo recordingsmdash without adding noise or colorshyation of Its own to the signal

Ffonlviow ol ly

A new shape in styli that means greater wall area contact and ultra-sonic frequency responsemdash yet with less wear force on Ihe record than an elliptical stylus Other styli with Iho same Shibata slyius effect holaquoo boen deshyveloped

The ellecl of (racking lorce (2 grams) on a disc using a SHIshyBATA stylus

The effect ol tracking force (2 grams) on a disc using a conventional oiiiptlcal stylus

Now the CD-4 Quadradisc is the potent force it deserves to be in the audio marketshyplace Artists and producers whove used the system extol its virtues and proclaim it a creative tool destined to spawn new vistas of musical involvement More and more

record companies are producing their top talent on CD-4 Quadradiscs More and more hardware manufacturers are including CO-4 demodulation circuitry in their 4-channel products l ess and less arcopy providing Ihe more cosily full logic

matrix circuits

Will the realmdashand onlymdash 4-channel disc please stand u p

Thank you Quadradisc

Getting hooked on CD-4 Getting hooked on CD-4 is a lot easier than it may sound

Begin with a basic 4-channel playback systemmdasha good turntable a 4-channel receiver (or amplifier) and four speakers closely matched in efficiency that please your listening preferences Add to the turntable one of the many excellent cartridges designed

for CD-4 disc reproduction preferably with the Shibata or equivalent stylus Now add a CD-4 demodulator exshyternally or built into Ihe turntable or quadraphonic receiver

Now pick out some ol your favorite musical artists from Ihe evergrowing Quadradisc list Then take them home listen to them and as one Quadradisc reviewer so graphically slated hear a

sonic diamond that really sparkles I

II you havent already exshyperienced the indescribable surround of sound provided by the CD-4 Quadradisc we can only suggest that you ask your favorite hi-fi dealer to demonstrate it to you If his equipment ts properly arranged it wont take long to convince you thai were now living in the year of 19CD-4

CD-4 System Combinations The possiblo hardware combinations that let you hoar the full audio dynamics ol the Quadradisc

4 - c f i a n n o l R e c e i v e

T i l 1 Hltlll CO-4 Demodulator

4-channel receiver with external demodulator -- ha I-I bullbull Receiver with built-in CD- Demodulator

4-channel receiver with built-in demodulator

Turntable with built-in CD-4 Demodulator

4-channel Receiver

4-channel receiver with turntable containing built-in demodulator

SHIBATA Myitis

Turntable

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

0

The lirsl and simplest solushytion was to take tour chanshynels ot recorded material scramble it in a predictable pattern Into two channels then unscramble it Into four channels again with special electronic circuitry in the playback equipment This matrix method worked to a degree The enhancement it provided to otherwise straight stereo source material was clearly audible and as a stereo enhancer matrix 4-channel reproducshytion should provide the home listener with a lot of musical pleasure in the future But even with the best electronic matrix unscram-blers ever devised someshything was always lost in the 4-2-4 translation The result was loss of the defined separation necessary for accurate reproduction ol the 4-channel master tape The only real solution was to find a way to put lour totally isolated complelely sepashyrate channels on an LP disc Somehow

The idea captured the fancy ol a team of Japanese engineers Unable to resist the challenge they put their

full efforts behind the masshysive research and developshyment program it takes to meet that kind of challenge Using compatibility (ability to perform equally as well on stereo equipment with ihe equivalent durability ol a stereo record) and discreteness the maximum separation of Information on each of the four channels)as their basic standards of performance evaluation they developed the revolutionary CD-4 Quadradisc CD-4 means Compatibility and Discreteness on all 4 chanshynels The first and only quadraphonic system that combines uncompromised accuracy of reproduction and unlimited creative flexishybility on a disc Now its inevitable

The sound of the future will have four sides CD-4 welcomes you to all of them

O

The quadraphonic multiple choice game Whatever initials you

christen them with there are basically only two quadrashyphonic disc systems on the marketmdashmatrix and discrete Matrix systems may be SQ QS or in some other form The only discrete system is CD-4 Each has its own philosophy

and approach to 4-channel sound reproduction And each has certain advantages and disadvantages But before any valid comparison can be made a firm understanding of the basic techniques of each system is an absolute must We offer the following capsulized descriptions and detailed illustrations towards that end

Recording 4 Channel

Encoding Matrix Record Decoding 2 Channels

Playback A Channels

Mixed sound after intershychange over each channel

Four channels ol discrete Information are mixed (encoded) Into two channels ihon unmixed (decoded) into tour-channels during playback Note ihe lane changing ot information thai ineviiably occurs during the 4 - 2 - 4 process

Recording 4-Channels

Modulating CD-4 flecod Demodulaimg 4 Channels

Playbaefc A Channels

Pure and unmixed sound from start to finish By recording the sum ot front and rear channels in the audible region and the dilforence between Iron and rear channels as modulated FM signals in the 20 - 45 kHz region tour discrete channels can bo maintained Irom master tape to loudshyspeakersmdashyet remain tully compatible with mono or stereo playback equipment

The 4-2-4 Matrix system

The 4-4-4 Discrete System

T h e Malr ix S y s t e m In theory the matrix system appears to be the simplest and most logical approach to the quadraphonic disc Just take lour separate channels ot information electronically scramble them together in a predetermined pattern or matrix and put this 2-chanshynel matrix on a standard sloroo disc Then all you had to do was develop a device that could decode that matrix during playback and restore the sound as closely a s possible to the

four discrete tracks of the original master lape

Sounds easy enough No major changes necessary in record material cutting and pressing techniques or FM broadcasting Just some extra electronic circuitry four speakers and you were ready for the quadraphonic record

But one problemmdashand apparently an unsolvable onemdashflaws the matrix theory Once those four original

discrote channels are mixed together there is no known way to recover them exactly as they were What happens during the 4-2-4 process is a blendshying of information between channels sometimes to the point where some channels becomo nearly indistinguishshyable Irom others This mingling ol inlormation is called crosstalk and the result is varying degrees of separation loss

Unfortunately even the bost matrix decoders with soshyphisticated phase shift and logic Circuitry cant prevent crosstalk nor can they provide the kind ot channel separation weve come to expect from stereo A decent stereo system has channel separation of around 20-25 dB But unless your matrix quadraphonic home equipment has full logic circuitry (and less than 20 ot the products made today do) channel separation can drop to as low as 3 dB during the matrix decoding process

Ericooing M a t laquo Record Decoding with 2 Channel Logic Circuitry

Playback 4 Channels

Thats very c lose to being monaural sound and far less than necessary for acceptshyable reproduction of the quadraphonic sound fields portrayed on 4-channel masters Where tho matrix system really shines however is in its ability to enhance

standard stereo records Anyone whos heard their favorite stereo LP played through a good matrix system will testify to that For that reason alone its an advantage to have matrix circuitry in your quadraphonic playback equipment

O

T h e D i s c r e t e S y s t e m The discrete approach to the quadraphonic disc represhysented an entirely different point of view right from the beginning Unwilling to accept the limitations of existing technology discrete-devoted engineers recognizshyed the pure necessity of four completely separate channels on a d iscmdashand then set out to produce one

First they looked at the signal being put on the standard 45-45 stereo record groovemdashup to 18000 Hertz

on better records But why they reasoned must that be the uppor limit Available techniques permitted pressing up to 45000 Hertz on the groove wall Cartridge technology w a s such that a cartridge could be produced that would accurately track at such frequencies and higher

Then why not record the sum of front and rear channels In the normal audible region and the difference between front and rear channels as ultrasonic modulated FM

signals up in the 20-45000 Hz region That way the resulting disc would bo fully compatible with existing stereo equipment yet provide four totally discrete channels of information with the proper playback equipment Since the two signals are so far apart in the frequency spectrum Ihe possibility of interference would be eliminated

Then all that was needed was some good FM demodulation circuitry in the playback equipmentmdashthe kind thats

CD-4 Recording and Playback Processes CD-4 Record

2-channel Playback CD -4 Rcf or a

U + U - L

4-channel Pluyback CD-4 i- - bull

Rocordmg 4 Channel

Demodulating

fa + L H laquo U zMmjf

tU t U r j t V - U ) _ u

|R +Bal + (B) - B raquo ) _ bdquo r

M o d u l a t i o n

Source Recording Proceaa

been used in FM stereo multiplexing for yearsmdashand a stylus capable of delivershying the ultrasonic frequency response required

Utilizing this new concept the artist engineer and record producer would for the first time be able to use

the unlimited creative freeshydom afforded through the discrete channel mediummdash and the listener would be able to hear everything thai creative freedom had to offer with absolute accuracymdashall In an amazing new disc

The result was Quadradisc

Mill the real 4-channel disc please stand up A lot ol new developments had to take placo betore the CD-4 discrete Quadradisc process could become a viable concept in the quadrashyphonic marketplace A tribute to todays audio technology all of those necshyessary developments have

A Matrix Quadraphonic Sound Field

been accomplished with the uncompromising concern for accuracy and artistic freedom that has been the very foundation ot the discrete disc philosophy

One of the basic requireshyments of the Quadradisc for

instance was to provide the consumer with a product that had at least equivalent durability and performance life ol its stereo counterpart Record companies soon came up with new materials that were significantly harder with lower noise characteristics

(a) A direct sound may bo assigned to a single chennt while the remaining three may bo usod lor ils natural ambience Since crosstalk is absent in the discrete system the etfecl is totally accurate

(n) Panning (Ihe ability lo move tho location ol a sound within the sound field) Is possible In any directionmdash even overhead Absence of crosstalk makes Ihoso movements as clear and precise as the original 4-channel master tape

(c) Tho stago-hall relationshyshipmdash particularly important in classical musicmdashremains pure and uncolored because of discreteness The orcheshystra always remains up Iront while rear speakers provide necessary natural ambience

(d) A soloisl can be placed In the center ol the room while four totally separate instruments or groups of instruments appear in each cornermdasha unique discroto listening experience

Quadradisc Effects Some illustrations of me effect iioxibiiily and accuracy possible only with Quadradisc

Tho Quadraphonic Sound Field A clear look at the typo ol sound fields created by discrete and matrix systems Diagram A represents the exact sound field produced by Ihe original 4-channol master tape Diagram B shows tho crosstalk inevitable in a matrix system

A Discroto Quadraphonic Sound Field

than ever before possible This new Quadradisc compound actually adds to performance longevity up to 50 and will soon be used for producing top quality stereo records Several cartridge manufacshyturers designed and now produce fine ultra-broadband cartridges fully capable of reaching the upper limits Of

the quadradiscmdashand beyond A whole new shape in styl imdash the Shibata typemdashwas conshyceived and perfected This new super-stylus meant greatly increased frequency response and significantly decreased record wear Extra-precision cutting mastering and pressing techniques were required and implementedmdashanother

quality advancement that will eventually spill over Into stereo products Demodula-lion systems were designed that deliver four discrete channels of sound equivalent in separation to some of the lines stereo recordingsmdash without adding noise or colorshyation of Its own to the signal

Ffonlviow ol ly

A new shape in styli that means greater wall area contact and ultra-sonic frequency responsemdash yet with less wear force on Ihe record than an elliptical stylus Other styli with Iho same Shibata slyius effect holaquoo boen deshyveloped

The ellecl of (racking lorce (2 grams) on a disc using a SHIshyBATA stylus

The effect ol tracking force (2 grams) on a disc using a conventional oiiiptlcal stylus

Now the CD-4 Quadradisc is the potent force it deserves to be in the audio marketshyplace Artists and producers whove used the system extol its virtues and proclaim it a creative tool destined to spawn new vistas of musical involvement More and more

record companies are producing their top talent on CD-4 Quadradiscs More and more hardware manufacturers are including CO-4 demodulation circuitry in their 4-channel products l ess and less arcopy providing Ihe more cosily full logic

matrix circuits

Will the realmdashand onlymdash 4-channel disc please stand u p

Thank you Quadradisc

Getting hooked on CD-4 Getting hooked on CD-4 is a lot easier than it may sound

Begin with a basic 4-channel playback systemmdasha good turntable a 4-channel receiver (or amplifier) and four speakers closely matched in efficiency that please your listening preferences Add to the turntable one of the many excellent cartridges designed

for CD-4 disc reproduction preferably with the Shibata or equivalent stylus Now add a CD-4 demodulator exshyternally or built into Ihe turntable or quadraphonic receiver

Now pick out some ol your favorite musical artists from Ihe evergrowing Quadradisc list Then take them home listen to them and as one Quadradisc reviewer so graphically slated hear a

sonic diamond that really sparkles I

II you havent already exshyperienced the indescribable surround of sound provided by the CD-4 Quadradisc we can only suggest that you ask your favorite hi-fi dealer to demonstrate it to you If his equipment ts properly arranged it wont take long to convince you thai were now living in the year of 19CD-4

CD-4 System Combinations The possiblo hardware combinations that let you hoar the full audio dynamics ol the Quadradisc

4 - c f i a n n o l R e c e i v e

T i l 1 Hltlll CO-4 Demodulator

4-channel receiver with external demodulator -- ha I-I bullbull Receiver with built-in CD- Demodulator

4-channel receiver with built-in demodulator

Turntable with built-in CD-4 Demodulator

4-channel Receiver

4-channel receiver with turntable containing built-in demodulator

SHIBATA Myitis

Turntable

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

T h e Malr ix S y s t e m In theory the matrix system appears to be the simplest and most logical approach to the quadraphonic disc Just take lour separate channels ot information electronically scramble them together in a predetermined pattern or matrix and put this 2-chanshynel matrix on a standard sloroo disc Then all you had to do was develop a device that could decode that matrix during playback and restore the sound as closely a s possible to the

four discrete tracks of the original master lape

Sounds easy enough No major changes necessary in record material cutting and pressing techniques or FM broadcasting Just some extra electronic circuitry four speakers and you were ready for the quadraphonic record

But one problemmdashand apparently an unsolvable onemdashflaws the matrix theory Once those four original

discrote channels are mixed together there is no known way to recover them exactly as they were What happens during the 4-2-4 process is a blendshying of information between channels sometimes to the point where some channels becomo nearly indistinguishshyable Irom others This mingling ol inlormation is called crosstalk and the result is varying degrees of separation loss

Unfortunately even the bost matrix decoders with soshyphisticated phase shift and logic Circuitry cant prevent crosstalk nor can they provide the kind ot channel separation weve come to expect from stereo A decent stereo system has channel separation of around 20-25 dB But unless your matrix quadraphonic home equipment has full logic circuitry (and less than 20 ot the products made today do) channel separation can drop to as low as 3 dB during the matrix decoding process

Ericooing M a t laquo Record Decoding with 2 Channel Logic Circuitry

Playback 4 Channels

Thats very c lose to being monaural sound and far less than necessary for acceptshyable reproduction of the quadraphonic sound fields portrayed on 4-channel masters Where tho matrix system really shines however is in its ability to enhance

standard stereo records Anyone whos heard their favorite stereo LP played through a good matrix system will testify to that For that reason alone its an advantage to have matrix circuitry in your quadraphonic playback equipment

O

T h e D i s c r e t e S y s t e m The discrete approach to the quadraphonic disc represhysented an entirely different point of view right from the beginning Unwilling to accept the limitations of existing technology discrete-devoted engineers recognizshyed the pure necessity of four completely separate channels on a d iscmdashand then set out to produce one

First they looked at the signal being put on the standard 45-45 stereo record groovemdashup to 18000 Hertz

on better records But why they reasoned must that be the uppor limit Available techniques permitted pressing up to 45000 Hertz on the groove wall Cartridge technology w a s such that a cartridge could be produced that would accurately track at such frequencies and higher

Then why not record the sum of front and rear channels In the normal audible region and the difference between front and rear channels as ultrasonic modulated FM

signals up in the 20-45000 Hz region That way the resulting disc would bo fully compatible with existing stereo equipment yet provide four totally discrete channels of information with the proper playback equipment Since the two signals are so far apart in the frequency spectrum Ihe possibility of interference would be eliminated

Then all that was needed was some good FM demodulation circuitry in the playback equipmentmdashthe kind thats

CD-4 Recording and Playback Processes CD-4 Record

2-channel Playback CD -4 Rcf or a

U + U - L

4-channel Pluyback CD-4 i- - bull

Rocordmg 4 Channel

Demodulating

fa + L H laquo U zMmjf

tU t U r j t V - U ) _ u

|R +Bal + (B) - B raquo ) _ bdquo r

M o d u l a t i o n

Source Recording Proceaa

been used in FM stereo multiplexing for yearsmdashand a stylus capable of delivershying the ultrasonic frequency response required

Utilizing this new concept the artist engineer and record producer would for the first time be able to use

the unlimited creative freeshydom afforded through the discrete channel mediummdash and the listener would be able to hear everything thai creative freedom had to offer with absolute accuracymdashall In an amazing new disc

The result was Quadradisc

Mill the real 4-channel disc please stand up A lot ol new developments had to take placo betore the CD-4 discrete Quadradisc process could become a viable concept in the quadrashyphonic marketplace A tribute to todays audio technology all of those necshyessary developments have

A Matrix Quadraphonic Sound Field

been accomplished with the uncompromising concern for accuracy and artistic freedom that has been the very foundation ot the discrete disc philosophy

One of the basic requireshyments of the Quadradisc for

instance was to provide the consumer with a product that had at least equivalent durability and performance life ol its stereo counterpart Record companies soon came up with new materials that were significantly harder with lower noise characteristics

(a) A direct sound may bo assigned to a single chennt while the remaining three may bo usod lor ils natural ambience Since crosstalk is absent in the discrete system the etfecl is totally accurate

(n) Panning (Ihe ability lo move tho location ol a sound within the sound field) Is possible In any directionmdash even overhead Absence of crosstalk makes Ihoso movements as clear and precise as the original 4-channel master tape

(c) Tho stago-hall relationshyshipmdash particularly important in classical musicmdashremains pure and uncolored because of discreteness The orcheshystra always remains up Iront while rear speakers provide necessary natural ambience

(d) A soloisl can be placed In the center ol the room while four totally separate instruments or groups of instruments appear in each cornermdasha unique discroto listening experience

Quadradisc Effects Some illustrations of me effect iioxibiiily and accuracy possible only with Quadradisc

Tho Quadraphonic Sound Field A clear look at the typo ol sound fields created by discrete and matrix systems Diagram A represents the exact sound field produced by Ihe original 4-channol master tape Diagram B shows tho crosstalk inevitable in a matrix system

A Discroto Quadraphonic Sound Field

than ever before possible This new Quadradisc compound actually adds to performance longevity up to 50 and will soon be used for producing top quality stereo records Several cartridge manufacshyturers designed and now produce fine ultra-broadband cartridges fully capable of reaching the upper limits Of

the quadradiscmdashand beyond A whole new shape in styl imdash the Shibata typemdashwas conshyceived and perfected This new super-stylus meant greatly increased frequency response and significantly decreased record wear Extra-precision cutting mastering and pressing techniques were required and implementedmdashanother

quality advancement that will eventually spill over Into stereo products Demodula-lion systems were designed that deliver four discrete channels of sound equivalent in separation to some of the lines stereo recordingsmdash without adding noise or colorshyation of Its own to the signal

Ffonlviow ol ly

A new shape in styli that means greater wall area contact and ultra-sonic frequency responsemdash yet with less wear force on Ihe record than an elliptical stylus Other styli with Iho same Shibata slyius effect holaquoo boen deshyveloped

The ellecl of (racking lorce (2 grams) on a disc using a SHIshyBATA stylus

The effect ol tracking force (2 grams) on a disc using a conventional oiiiptlcal stylus

Now the CD-4 Quadradisc is the potent force it deserves to be in the audio marketshyplace Artists and producers whove used the system extol its virtues and proclaim it a creative tool destined to spawn new vistas of musical involvement More and more

record companies are producing their top talent on CD-4 Quadradiscs More and more hardware manufacturers are including CO-4 demodulation circuitry in their 4-channel products l ess and less arcopy providing Ihe more cosily full logic

matrix circuits

Will the realmdashand onlymdash 4-channel disc please stand u p

Thank you Quadradisc

Getting hooked on CD-4 Getting hooked on CD-4 is a lot easier than it may sound

Begin with a basic 4-channel playback systemmdasha good turntable a 4-channel receiver (or amplifier) and four speakers closely matched in efficiency that please your listening preferences Add to the turntable one of the many excellent cartridges designed

for CD-4 disc reproduction preferably with the Shibata or equivalent stylus Now add a CD-4 demodulator exshyternally or built into Ihe turntable or quadraphonic receiver

Now pick out some ol your favorite musical artists from Ihe evergrowing Quadradisc list Then take them home listen to them and as one Quadradisc reviewer so graphically slated hear a

sonic diamond that really sparkles I

II you havent already exshyperienced the indescribable surround of sound provided by the CD-4 Quadradisc we can only suggest that you ask your favorite hi-fi dealer to demonstrate it to you If his equipment ts properly arranged it wont take long to convince you thai were now living in the year of 19CD-4

CD-4 System Combinations The possiblo hardware combinations that let you hoar the full audio dynamics ol the Quadradisc

4 - c f i a n n o l R e c e i v e

T i l 1 Hltlll CO-4 Demodulator

4-channel receiver with external demodulator -- ha I-I bullbull Receiver with built-in CD- Demodulator

4-channel receiver with built-in demodulator

Turntable with built-in CD-4 Demodulator

4-channel Receiver

4-channel receiver with turntable containing built-in demodulator

SHIBATA Myitis

Turntable

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

been used in FM stereo multiplexing for yearsmdashand a stylus capable of delivershying the ultrasonic frequency response required

Utilizing this new concept the artist engineer and record producer would for the first time be able to use

the unlimited creative freeshydom afforded through the discrete channel mediummdash and the listener would be able to hear everything thai creative freedom had to offer with absolute accuracymdashall In an amazing new disc

The result was Quadradisc

Mill the real 4-channel disc please stand up A lot ol new developments had to take placo betore the CD-4 discrete Quadradisc process could become a viable concept in the quadrashyphonic marketplace A tribute to todays audio technology all of those necshyessary developments have

A Matrix Quadraphonic Sound Field

been accomplished with the uncompromising concern for accuracy and artistic freedom that has been the very foundation ot the discrete disc philosophy

One of the basic requireshyments of the Quadradisc for

instance was to provide the consumer with a product that had at least equivalent durability and performance life ol its stereo counterpart Record companies soon came up with new materials that were significantly harder with lower noise characteristics

(a) A direct sound may bo assigned to a single chennt while the remaining three may bo usod lor ils natural ambience Since crosstalk is absent in the discrete system the etfecl is totally accurate

(n) Panning (Ihe ability lo move tho location ol a sound within the sound field) Is possible In any directionmdash even overhead Absence of crosstalk makes Ihoso movements as clear and precise as the original 4-channel master tape

(c) Tho stago-hall relationshyshipmdash particularly important in classical musicmdashremains pure and uncolored because of discreteness The orcheshystra always remains up Iront while rear speakers provide necessary natural ambience

(d) A soloisl can be placed In the center ol the room while four totally separate instruments or groups of instruments appear in each cornermdasha unique discroto listening experience

Quadradisc Effects Some illustrations of me effect iioxibiiily and accuracy possible only with Quadradisc

Tho Quadraphonic Sound Field A clear look at the typo ol sound fields created by discrete and matrix systems Diagram A represents the exact sound field produced by Ihe original 4-channol master tape Diagram B shows tho crosstalk inevitable in a matrix system

A Discroto Quadraphonic Sound Field

than ever before possible This new Quadradisc compound actually adds to performance longevity up to 50 and will soon be used for producing top quality stereo records Several cartridge manufacshyturers designed and now produce fine ultra-broadband cartridges fully capable of reaching the upper limits Of

the quadradiscmdashand beyond A whole new shape in styl imdash the Shibata typemdashwas conshyceived and perfected This new super-stylus meant greatly increased frequency response and significantly decreased record wear Extra-precision cutting mastering and pressing techniques were required and implementedmdashanother

quality advancement that will eventually spill over Into stereo products Demodula-lion systems were designed that deliver four discrete channels of sound equivalent in separation to some of the lines stereo recordingsmdash without adding noise or colorshyation of Its own to the signal

Ffonlviow ol ly

A new shape in styli that means greater wall area contact and ultra-sonic frequency responsemdash yet with less wear force on Ihe record than an elliptical stylus Other styli with Iho same Shibata slyius effect holaquoo boen deshyveloped

The ellecl of (racking lorce (2 grams) on a disc using a SHIshyBATA stylus

The effect ol tracking force (2 grams) on a disc using a conventional oiiiptlcal stylus

Now the CD-4 Quadradisc is the potent force it deserves to be in the audio marketshyplace Artists and producers whove used the system extol its virtues and proclaim it a creative tool destined to spawn new vistas of musical involvement More and more

record companies are producing their top talent on CD-4 Quadradiscs More and more hardware manufacturers are including CO-4 demodulation circuitry in their 4-channel products l ess and less arcopy providing Ihe more cosily full logic

matrix circuits

Will the realmdashand onlymdash 4-channel disc please stand u p

Thank you Quadradisc

Getting hooked on CD-4 Getting hooked on CD-4 is a lot easier than it may sound

Begin with a basic 4-channel playback systemmdasha good turntable a 4-channel receiver (or amplifier) and four speakers closely matched in efficiency that please your listening preferences Add to the turntable one of the many excellent cartridges designed

for CD-4 disc reproduction preferably with the Shibata or equivalent stylus Now add a CD-4 demodulator exshyternally or built into Ihe turntable or quadraphonic receiver

Now pick out some ol your favorite musical artists from Ihe evergrowing Quadradisc list Then take them home listen to them and as one Quadradisc reviewer so graphically slated hear a

sonic diamond that really sparkles I

II you havent already exshyperienced the indescribable surround of sound provided by the CD-4 Quadradisc we can only suggest that you ask your favorite hi-fi dealer to demonstrate it to you If his equipment ts properly arranged it wont take long to convince you thai were now living in the year of 19CD-4

CD-4 System Combinations The possiblo hardware combinations that let you hoar the full audio dynamics ol the Quadradisc

4 - c f i a n n o l R e c e i v e

T i l 1 Hltlll CO-4 Demodulator

4-channel receiver with external demodulator -- ha I-I bullbull Receiver with built-in CD- Demodulator

4-channel receiver with built-in demodulator

Turntable with built-in CD-4 Demodulator

4-channel Receiver

4-channel receiver with turntable containing built-in demodulator

SHIBATA Myitis

Turntable

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

than ever before possible This new Quadradisc compound actually adds to performance longevity up to 50 and will soon be used for producing top quality stereo records Several cartridge manufacshyturers designed and now produce fine ultra-broadband cartridges fully capable of reaching the upper limits Of

the quadradiscmdashand beyond A whole new shape in styl imdash the Shibata typemdashwas conshyceived and perfected This new super-stylus meant greatly increased frequency response and significantly decreased record wear Extra-precision cutting mastering and pressing techniques were required and implementedmdashanother

quality advancement that will eventually spill over Into stereo products Demodula-lion systems were designed that deliver four discrete channels of sound equivalent in separation to some of the lines stereo recordingsmdash without adding noise or colorshyation of Its own to the signal

Ffonlviow ol ly

A new shape in styli that means greater wall area contact and ultra-sonic frequency responsemdash yet with less wear force on Ihe record than an elliptical stylus Other styli with Iho same Shibata slyius effect holaquoo boen deshyveloped

The ellecl of (racking lorce (2 grams) on a disc using a SHIshyBATA stylus

The effect ol tracking force (2 grams) on a disc using a conventional oiiiptlcal stylus

Now the CD-4 Quadradisc is the potent force it deserves to be in the audio marketshyplace Artists and producers whove used the system extol its virtues and proclaim it a creative tool destined to spawn new vistas of musical involvement More and more

record companies are producing their top talent on CD-4 Quadradiscs More and more hardware manufacturers are including CO-4 demodulation circuitry in their 4-channel products l ess and less arcopy providing Ihe more cosily full logic

matrix circuits

Will the realmdashand onlymdash 4-channel disc please stand u p

Thank you Quadradisc

Getting hooked on CD-4 Getting hooked on CD-4 is a lot easier than it may sound

Begin with a basic 4-channel playback systemmdasha good turntable a 4-channel receiver (or amplifier) and four speakers closely matched in efficiency that please your listening preferences Add to the turntable one of the many excellent cartridges designed

for CD-4 disc reproduction preferably with the Shibata or equivalent stylus Now add a CD-4 demodulator exshyternally or built into Ihe turntable or quadraphonic receiver

Now pick out some ol your favorite musical artists from Ihe evergrowing Quadradisc list Then take them home listen to them and as one Quadradisc reviewer so graphically slated hear a

sonic diamond that really sparkles I

II you havent already exshyperienced the indescribable surround of sound provided by the CD-4 Quadradisc we can only suggest that you ask your favorite hi-fi dealer to demonstrate it to you If his equipment ts properly arranged it wont take long to convince you thai were now living in the year of 19CD-4

CD-4 System Combinations The possiblo hardware combinations that let you hoar the full audio dynamics ol the Quadradisc

4 - c f i a n n o l R e c e i v e

T i l 1 Hltlll CO-4 Demodulator

4-channel receiver with external demodulator -- ha I-I bullbull Receiver with built-in CD- Demodulator

4-channel receiver with built-in demodulator

Turntable with built-in CD-4 Demodulator

4-channel Receiver

4-channel receiver with turntable containing built-in demodulator

SHIBATA Myitis

Turntable

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

CD-4 is in the air As it was during (ho Initial development of stereo the FM broadcasting medium is lagging behind tho rost ot industry in its commitment to 4-channel This is not to fault the FM broadcasters however To the contrary it is prudent policy on their part

The reasons are simple when looked at through the perspective of the station owners and operators Although some stations utilize tape source material most FM programming is derived from disc That means the purchase and installation ol special quadraphonic broadcasting equipment designed to utilize the source material available on quadraphonic discs

But before the FM broadshycaster is willing to commit

himself to the expenditure and format alterations required to make Ihe changeover to 4-channel transmission he must be totally satisfied with tho answers to some very important questions For instance will there be enough quadraphonic source material to Ml his huge appetite

What will the standard quadraphonic disc process b e What kind ol equipment will he need to assuro good quality quadraphonic transshymission and how exponsive is it Will there be enough people in his listening audience who have the proper 4-channel recoiving equipment to make this a profitably wise venture 7

Some of these questions have already boon answered The rapidly expanding library

of quadraphonic software and the increasing sa les ol quadraphonic hardware will assure him of material to play and an adequately largo audience to listen to it

Other questions however still remain unansweredmdashbut not for long A long ser ies of comparative tests using the discrete disc and all of the newly developed discrete 4-channel transmitting systems is in its final stages It is felt by most broadcasters that once the results of this test are fully compiled an F C C decision on the standard method of quadraphonic broadcasting would be less than a year away

One final observation It is significant to note that III systems being tested are discrete using CO-4 Quadra-d iscs and discrete 4-channel tape as the prime source material

That should tell you someshything Is in the air

Suggested speaker

The Discrete Broadcasting System Flo- (1) shows tho sloroo FM method ol boadcasllng used today with the main base signal carrying the sum ot (ell and right channels and the subcarrler providing the diforonco botwoen iet and right chonnois This method allows tor two discroto channels ot stereo in formation and full monaural signal as well

Fig (2] Illustrates the proshyposed discrete quadraphonic broadcasting system Hero the main signal carries the sum ol all channels (mono) while an in phase subcarner provides standard stereo reproduction A second subcarner and B quadrature subcarrier deliver ihe remaining information nocdod to broadcast discrete 4-channei information and reproduce it exactly as it appears on the lap or Quadradisc source material at the station

placement for CD-4 listening Your room furnishings were probably arranged before you joined the ranks of quad high fidelity music listeners Here are some tips and insight to get the most from your new listenshying experience Firsl romomber that each set-up is a s unique and personal a s the individuals who listen to it Dont be afraid to experiment Moving a speaker toward a corner increases the bass just as in stereo II you hear too much bass for your taste move the speaker away from the corner or get it up off the lloor by placing it on the

The ideal location of speakers and listeners Tne serious listener may insisi on being at the center even il furniture must be rearranged

stand or mounting it on the wall

The first step is to decide where you will sit for your most serious listeningmdash perhaps a favorite chair or sofa Then locate the front speakers directly across from tho listening sofa just as you would il the system woro only a stereo Now place the rear speakers in back of you if possible remembershying to keep the rear left on the same side a s the front left

It often occurs that the desired listening seats are

In this configuration the rear speakers may be placed slightly above Ihe listeners and mourned on ihe wall or excellent coverage ol Ihe listening area II Ihe speaker nave narrow dispersion angle them slightly to provide gtor adequate coverage

on a sofa which is against a wall making il impossible to move tho speakers in back of you In this case if you simply put the speakers against the wall on each side ot the couch you will be literally listening to the back of the speaker This is hardly ideal Hanging the speakers up high toward the ceiling or putting them at the extreme lelt and right with a slight angle will Improve the depth of sound

Although quad requires a little more attention to speaker placement than stereo the end listening result will be a much larger listening area than you c a n hope for from stereo

For a typical living roorruOimng room combinations in contemposhyrary home this arrangement may serve to Illustrate an idea that will make an effective quad environment

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

Ive already chosen Advocates ol the CD-4 Compatible Discrete 4-Chanshynel Disc are an unusually enshythusiastic bunch Because once anyone involved with the art ot sound reproducshytionmdashbe it artist producer engineer or industry l e a d e r -becomes involved with CD-4 avid enthusiasm tor its uncompromised sonic ac shycuracy and unlimited creative flexibility is a natural result

Listen to what a tew of this growing group of CD-4 devotees have to say about the discrete disc Once you do you wont find it difficult to understand why CD-4 has become the overwhelming choice of professionals who wont accept anything less than the very best in sound reproduction

flfwo Moitleiieyro Henry Manc in i

4 h- i in vans freedom T h e fact is that 4-channel sound has opened up a new world of creativity for the composerarrangerproducer We now have the freedom to surround the listener with any sound environment our imaginations can conceive Tho freedom to locate a sound anywhere within tho environment And the freeshydom to manipulate and movo sound in any direction

But these new freedoms can onty existmdashand be utilized if the final product can bo faithfully reproduced on disc without any limitashytions Of tho several quadrashyphonic disc formats on the market in my opinion only the compatible discrete 4-channel record meets these criteria Thats why to me CD-4 means freedom

Quadraphonic the new sound Quad shouldnt be comshy

pared to stereo says Mancini its a whole new listening experience a real wrap around sound Actually its an extension into the home of the new techniques that have boon developed lor wido-scroon movies mixed media shows and the new environments in which the listener is comshypletely immersed in sound Its amazing what it docs for any kind of music from Mozart to S o u s a to J a z z I have my own system in my billiard room In Malibu with four speakers mounted in corners With Sousa in quad the bold lines of the writing and the bright colors of the instruments come jumping out of the speakers I get that 50-piece band marching right into the room

Jac Holzman Richard Perry

Our commitment to CD-4 was the result ol almost two years of exhaustive research by the WarnerEioktra Atlantic engineering team Involved was a scrupulously detailed evaluation of all competing quad systems Only then did we make our decision s a y s J a c Holzman Senior Vice President Warner Comshymunications and Chairman Quadraphonic Planning Group of the WarnerElektra Atlantic Labels Why CD-4 The WEA labels are blessed with an awesome roster of talent Frank Sinatra Carly Simon Gordon Lightfoot Aretha Franklin

The Doobie Brothers Bread Deep Purple Alice Cooper Mystic Moods Sea ls and Crofts Judy Collins Artists of this magmtudo demand the ultimate in state-of-the-art recording techshynology They deserve the only 4-channel disc that encourages full creative freedom without limitation

a man who knows what hes talking about talks about CD-4-Richard Perry Is one of the main men in the music business today Not only is he the brilliant independent producer tor Ringo Starr Carly Simon Barbra Streisand Harry Nilsson and El la Fitzgerald he s also a twlco-named producer ol tho year with 10 gold albums and 5 gold singles to his name In other words when Richard Perry talks about

CD-4 he knows what hes talking about I think I can sofoly say Ive boon involved with virtually every kind of music thats being produced today The more we get into four-channel recording four-channel mixshying and creating special efshyfects the more we want the most faithful reproduction ot our efforts Im confident when I say lhat CD-4 Is the truest reproduction there is Im concerned with the total musical environment I create I want my music to be as exciting visually as It Is musically The only way to achieve this potential today is to do the disc in CD-4

One of the highest moments Ive ever experienced in a studio was the first time I heard my work back In four-channel What I hoard really made me believe that CD-4 is the only way to go

or compromise And theyll settle for nothing loss Our software efforts when added to comparably vigorous thrusls by RCA and other important CD-4 recordshying companies provides continuing dramatic evidence ot our far-reaching comshymitment to CD-4 Everyone from hardware manufacturer to retailer to customer can be assured there will always bo CD-4 product The

public gets a fair deal too With CD-4 the record buyermdashwith his quality equipmentmdashdoesnt have to settle for a disc that is l ess discrete than the quad tape he plays over his moro modest car system

Todays CD-4 d iscs stand toe to toe with any stereo product In frequency response total playing time and in physical durability And they play true quad

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

The CD-4 roster II doesnl make any diffeshyrence how good the quadraphonic disc recording process is If Ihe audio hardware manufacturers dont produce the equipshyment you need to hear il in all its glory at home it isnt worth a hoot But again that takes a major commitshyment on the pari ol the hardshyware manufacturer It means new designs new tooling new models new marketing direction It means that he has to believe In the technishycal and sales viability of the product strongly enough to

invest Ihe many thousands of dollars required to make that kind of production and marketing conversion

Thats why were excepshytionally proud of the growing roster of hardware manushyfacturers who have joined the CD-4 ranks Today there are more than 25 CO-4 cartridges to choose Irom And al latest count more than 50 electronic equipshyment manufacturers include CD-4 demodulation capabilishyties m their quadraphonic productsmdashover 5 as many

as those who provide full logic matrix circuitry An abshysolute must by the way for matrix performance that even begins to approach ihe separation quality ol CD-4 and then only under certain performance conditions

Look through the following list of hardware manushyfacturers who think enough about Ihe potenlional of CD-4 to make their equipment completely ready for the significant marketplace it represents You might come to the conshyclusion that most hardware manufacturers have already made their choice too

Equipment Manufacturers AKAI Kokusai Musen Rotel Audio World Magnavox Sanyo B amp O Marantz Sansui BGW Miida Sharp Brother Mitsubishi Sherwood Clarion Muntz Shin Shirasuna Denki Cybernet NEC Sonab Crown Radio Nikko Standard Denkl Onkyo Nippon Columbia Superscopo Electrohome Noresco Sylvania Fisher Onkyo Tanasawa Foster Panasonic Technics by Panasonic General Philips Terutron Gladding Claricon Pilot Toshiba Harman Kardon Pioneer Union Heath Plcssey Wells Gardner Hitachi Ouadrasonics Yamaha JVC RCA Kenwood Roland

Cartridge Manufacturers

The sound on CD-4

t i r o M o d e m Quartet Oues Are Back Q0- I6S C harms M i n f l i i M m g u s M o v e QO- teS ) B t l i i C o h i a m S p e c i i u m QD-72W Honor ta F i u k -bull m o SoBiy Q U 2 1 n w b n j M a n n H o l d O n Im C o m m QD-1632 Haun-nr Hegtl L i v o B l M h O a - d n raquo a O U (019 i bull -bull mvitwtr Egt1laquonraquoior of M a n Q 3 - T O S B u n a Mid le r f h e O n i n e M 0 0 2 3 9 r n o Spinnerraquo r h o $ a t n n f o gt A r e t h a Frank l in H e B o i l Ol Are lho Fit|nlaquolin QD 0JJ1 O u t L l l i no lon N e 0gtllaquolaquoni Su i t Q O - 1 M 0 O i l FJvao Svengah Q O - I M A r e t h a F t t t k M n t l y al i v i m o i c V e i l OD-JJOS Mke Oid l -e io Tubular D e l s O D O - O b poundnc C lap ton bullffti O c e a n BivO 0 0 to3 t G e o r g e F iynn j o i n Cage OC-OT06 Bgtii i-M o M e y f l i p O D 9 0 0 E n o S a u m t e Wiretap QO-MC6 N B D m M o n o R laquo B B H OD- IOS i bullbulli i jigt Whto B a n d Q O 3 0 8 J G e J I s B a n d K iOMmaien 0 0 - 1 8 1 0 New A n a improved QD - ia i in K o M i l G io ran i n e P r o p h o i 00- IB12C t h o M o o e n JraquoH Ouar lo t The I o n Concer t Q 0 8 M I

Ho- io MiMMiir i in ro Leva I h e m e I r o n - t r i e G o o i a m e r APDiCCOl H e n r M j r - t i n i Manc in i Sa lu te Sou APD1-0C13 Hugo M o n t e n e g r o Sconor A t i M n c n A P D i O O J i Danny Davis ana n e Maraquohvl ie B rass Travelm APD1-003 N a i StuCkey n k e 1 - trade 10 I O V O Hair I U s e e II AH en Y o u A T i l O E M Caro l yn Met ier A P D 1 0 C 6 Henry Manc inlt OoC 5 e e i l n s e n Brass Ivory ano S l n n o s APOI-OCSo

P e n y Como A n d I L o v e Vo i So A P D i - 0 0 0 The j i m m y Castor B Linen U i m w i i o n I I I APD1-D103 t h e Guess W h o bull bull ID A P D 1 O I 3 0 Hugo Mon teneg ro Kail s D-amonos A P D I - 0 U 7 J O S O F o - e i n n o Com pa r im c i t s A P O - O U Dot l ie Weal i l Ms A i n g N w- lh V o u Jasf h a i i ve Look ing Far A P D I Oil F loyd Cramer Super Count ry H raquo A P 0 1 0 1 1 S Dav id i i bull i bull T - A P O 0 i 3 C i a n o y P ldo SCOl Count ry A P D V 0 2 1 I Danny U a v s ani The m s n v n o S M a i i ConObean C iu rse A P O - W 3 2 Jigti-y Rfincl l o r r i Mr f e e APOV073B I i c Beraquo l o l I n n J M Who Vo l U A P D I 0269 Henry Manc in i H i laquo P iano O r c n ml t h o Count ry G e n l i o m a n A P D I - 0 7 M rraquoo f r i o n d l Ol O i l i n e l i 0 i G r e a l e s t H APDl-03a Doi ly Par on i - Ovor A P D I J J 6 S HeyrJ Cgtnrrn i C i a M o l 7 3 A P D I O J M h i l i M t n ach rm i son A P D i - U i 9 J e laquo bull bull s o n Air p iano i 1 bull i bull bull bull bull i bull - A PD 1 - I I ] M

GM A l v m a Super B - i k e r APD1-D329 Char ley Pr ce - bull I - I i A P 0 - r j J 9 r i h e Gje-i vweo PoaO r o o O APDI-C40S D Ca iapasas A P O I - C H I O Hugo M o n i e r o g i o M j g o m W o n d o r L a n d A P Q 1 - W I 3 E l v i i f r e - k y CUi9-Mor a l laquom Hawa i i Va Sa ie ime VPSX WOW Hai r ( T r s A m u r i c a n Tnna i bull gt DO 1 0 7 6 l u e Neltv Oir th s B e e n a l o n g T m APDi-07e5 Danny D a v i t

N n i i w u i o D - i s i m psyapran Coun l y APD1-0S6S F loyd C M me i Tho y s j n g a i d i r ie H e i r - APOi-Wftu R o n u n PUra t o v e A P D i d O O H a r r y K i l svon P u t t y Cats A P D i C a m J i m te R r o w n l i s t n a l l i m e o l Niu A P O t - t o gt Perry Como Per ry A P O v o M S S iephon M r s - r - a n f APOI -0694 E l u s bullbull L i ve un S U g o in M n m p n n A P O I D K I C Oo l i te We S I H o L s e ai l e v a A P O v t t - u

However many now CD-4 albums featuring the most popular artists of today arc scheduled for release after the printing of this publicashytion For the most current list of CD-4 Compatible Discrete 4-Channel Discs check with your local record retailer O o y d C ramer i n COncer i APDl -0661 h e C raquo Ean O i c i f S P l a r t 110 M U M DI J i m H u n d i u APOI-Dampamp Horny

i u i Ou l v 1 bull 1 H o m y Manc in i A P D t - 0 6 2 Tho J a n P iano Quar te t LOI I I Happen APD1D680 j o t l o r a o n S a rsn ip D rooon F l y A P D 1 - 0 7 U Cl iSre ly P r i d e Peide ot A m e r e a APC i -O J Danny Oav is and Ine K n i h u H e D asn Latest and d e a l e s t A P D I - 0 J 7 The H u e s Corpo ra t i on Ftoekm Sou l A P D t - 0 raquo 5 The G u o s i A h a F lavours APD10H3B Hugo M o n i a r s n r a Dinora oy QroiF-ar i _ APOt-0764 Dun on M a n D a i APOi-Ods H o n m o M l map A L e o t n d In My Time A P D 1 ^ I B laquo E l v i s Pres ley P r o m i n a L a n d A P 0 - 0 j 3 F loye C ramer P lono Mas ie rp i eces I9C0- I9 5 APD -O iSJ

Ormanay rTne Pn l lade iB na O - c i T H Famashc Pr i i j de lpnmn Vol 1 AFtni-CW Omandy The Ph i laCetphu O i e n ShnsTaoviCh Symphony Ha IS ADOi -OOH 0 Te ier laquos Ine ed h e P lugf lon m G i n a s i r a - K v n H r a r d and A lan UUla elt P r c s c S to l en Goods C a m s LWed I rum i h e Uas ie r s A H O I O 0 1 6 O - m a n d y T h u Prraquo iacmpnJ Oref i I h o a n i a u n r Ph laOnphians V o l 2 A R O I - W t O rmandy t h e Pn i aae ln i i o C c h Sibe l ius Symphony N o 2 A t t O I - M i B 1 1 1 I -i O lCh Bach s C i n a t e s i Fuf lues A1DI-C076 O r m a n d y t n o P M i a a e l f l i a O Ch I c n a i k o v s t y S u i l e i c n

The N u i c r a c e r A i t D l - W O r m a n g i T h t Ph laeraquoiph ia Orch flimskyKona^v bull 1 APOl-OP

O r m a n r t y I r e P M a c e i p h u O H Dobus^y La Mlt Mavei D a p i n u a-id Ch ioe Sui tn So 2 U c S u s s i P r c i i f l P to t nc A f ternoon o l 4 Faun A U O COr O r m n 3 ( 1 i r Ph uan iph i a Orr n I cha ikovnky Suite f r o m Sn-an Lane AROT^IQID

Fl i^ t -nWein O r m a p d y rhD-Ptn lade ioh ia O n h f ia r i i na i H O l C o n c e r t p i o 2 A H O V 0 3 3 A l i M u s e u m o l Moce-r- Hnss Anrii-0332 F i e a l a r H a i t o n Pops G r e a l a l l U i laquo t r i e ramps A H O V O J J i V n c i i 1 0 1 h e a v y O r g i n 1 Carnegie l-a-i AFtO 039 O l n a n d y t n a PmUdOlah ia O C i r r naikavskv S O U i o i - t h o S leep ing Beau i y AFtD-0-69

ADC Grace Panasonic Audio Technica Grado Pickering B amp 0 JVC Pioneer Elac Micro Acoustic Stanton Empire Ortofon Toshiba

Many of the worlds great musical artists have already made their CD-4 debut We think its an impressive list and present it here for your convenience

I 0 - H N I C I l i raquo bullbullbullgt J l laquo u 0 r gt

I K lt P I O Oi CohCPM I D M I m H i laquo P i a n i i f

sltH-a sgt P l l T i i i bull bull raquo - gt laquo bull P e s a - H V a c n s o u r laquo M raquo laquo i n a S k p e i o r gt r H e i p v P m t P laquo e A P U o m j M e p h P gt n S 9 M M Out U C V f l t i I o raquo H M V Y O a at Cflftouio Hail Vol 7 A H 0 I M 7 KIM O r r r a n l y T - I M n j o o l p n O ch Sam) S a e n 9 m p K c n Mo J In C Mgtolaquo Op bull I O G V I gt AKHI 04P i o o laquo i a taaWMNM A m nanc -Ag Araquout o u I E O ) e - B i M S raquo a raquo V p Greatest H s o r e HM V C 7 A 3 - 0462 S r o m i c n S y raquo a laquo o i c T t t i a a - o n t to I n B t n w a r c n i laquo 0 07 0ltTl-gtClt lv M 0Craquogt $ 1 I n Ui O d i jB^ A W n i l M Sf i - I net I K i C D n PiliaintoraquoiK O K I no John Ahdgts C h e n - l i e s Sympho i y l o 4 Antli-0M9 O i i iJ J PhilaBiitpha O K U tS Symphony No 3 A MO I M a i 0gtraquonidy I P l lado lan ia Orel-1- r i o - i i n i y ate i - pound bull gt A W 1 I 0 4 W 0 laquo n e gt e raquo laquo laquo c raquo p raquo i a O f f U M i u ^ a s ^ a laquo laquo 4 bull F a A U D o t t a VgtQgt F a I I E-lttrCi A t tn O A 0 5 o n a u i l o r Pi bull h a i r o n O r t r Tho j o i n M i Chc M -PaMin l a B o h e m W raquo 0 laquo i 1 t u m ^ H PI iIraquou cm a n t Orel MMI i v o s p n S u d a n i AnDi OHIO W f raquo M K m P f i l h a m f i - i O n Pucvin Tosc A F U l l - O H

(bull i I - I -Hi - bull i iatrti i i - i i iraquolt C v u e n Kawe-Th C lt a i i x bull gt bull raquo S e c a f M m a t t j Aacopy-laquo70T

n I i c O c n S u n e t U J R a -4 bullbull O a s w c -Imdash S c o r e i ot r a n t W a - m a n APOl-OfO Fod inae i i sdo i -New Itrade l a r i r o P K C C

IMbullbulllaquo i i D A n o o r t i

Go ha i l N i iraquo ia l I l i lnaimu i ic Orel -

Ca-- ih i i r -laAAtc F i n Sltolte l i- HUfJr4l B O B I M AMD I rt7 j u u u i N raquo laquo Pnuftafrrut Orch T n - D i gt u r Ope-a CMcru Anna Mors-J-gt M a i i e i e r - r i a i AMU O 0 4 P e t WaaugtMlaquo ph ih j rax - laquo Gveti I h e A n o t o v a Oxni c n o n A MiarB HayalaM i t Great raquo - n c i Operas anoi -BOA am bull P c i u ai A i E M M r a t l mdash AMI) I O B 1 4 C Gaiha iOI Na l iu ia l Philharmonic G u n

I M I - I laquo i bull t rbdquo bull ( bull i i turn S c o r e of r lk lo i l l o i n AMII1 Of in

E L E K T R A ASYLUM l i U o U M i l f I O - laquo V C a i S laquo o l o a O A j B r f J Baiiy bull mA Want Tuu I O - laquo i raquo JuOy ampgtbullraquo Claquo io i O I h e Day tOOOM i n e H n l ol lin Un-ir raquogt ir C a n y gt ir No if mraquo S O laquo 4 J l i e Orv a me bull bull raquo bull bull bullBlMW k O SOU t h e fteU or Weaal I Q J C 1 S t a - J - n e M T t O laquo u X raquo lt I S l l O - I O M

Glti l i r a f O i w J f i M K r H Csvrt alaquoo S p a H O - l raquo l Car raquo Sin-on -ioiagtav C Q bullan BnD raquo raquo a u r e r Wlknt EO- OOl

I ha Laniea 0lt T h u O c C f FO-ICOt Hlte S i jrnar raquoairn4r bull B t f E C M C C 6 j e c B i e n egtraquolaquo I J M f g r r S raquo E O O I SeOtO Venc le C O - W 7 DaTTf l Gates n w - d L c l Her G o r O - Wt J J O Col i i n i JoOith C 0 - I D J 7 Ca- ly S i m o n Playing P o u u m E O - I O M tony Orlando A D a n bull bull bull bull bull i bull bdquo E d I0J4

WARNER BROS R E P R I S E amp a a raquo t f Summer bS4-7laquo7laquo A m e i c a Mohcav Vaft3fl Hamly Nvomm ( iood Old B u y s M S 4 - 2 H J Mar ill Miritaut A a t i o s a m tne Do- n i p U 4 J w i T c I s Aa-aauiBj bull i- W O T a araOta Cna- OS- Akiran ltwjgt-eri B-rf A i F a i e t p r e E a t l C X 4 0 I J 1 S e a K amp C r ( S u n o e i n C t t H W S a 7 6 i I no Dcooie B r o i l e r gt Wit at We-e O - c o Vicoo W S 4 - W Ai i io C o v e n Musclo ol I O V H BSA-3UH I r e Sin S i-Mi i i n n i i ings sini-re- B 5 - a r O M a t i i C r o u igtraquofgto--a G x i HS4-fon h e O o o e Bgtdltgtes I k e C a a r raquo - and Ate 6poundXM A raquo ( raquo C w w Ba ix i Doaar I U I bull gt ls34 J a m a s l a y i o Ona Man Dop B^a-76i Deep P w p l e Mat i n n Koad DSlt-CV Clack Saaoath ParanniO W s a - e a r I l a r k S i i a i - i 5 ime H-ee I n t - o raquo I bull M raquo i laquo r l lt4 l l f i Gordon L a t M M iur-JQyMi US-I 7 1 r r a n $ a v a W n - laquo E r raquo laquo i i B a n f S 4 - 1 M AgtIO GattKae 1 as t o ne B too lyraquo MSa 7iagt frank 5maia F r a n S n a P a bull Or vales Hit V O J 7 FS4-e34 bull rank Snatia My Way F S a t O T B bullrank zspin Apccirophn 0 S 4 - t S h e Siotneri 0 - laquo - - i e $-ngtv D S 2 i raquo u lac-st t U n a t e e O r T e a bull bull W4^ B S 4 - 7 4 D o j O e Btoenc i f i y u u n - S l - e e t B - U i r j Ml--- SASorH H8 iraquogtraquoyO- BS4764 Sonnes in MollBn BS46Wi MysH MooOs A M a - onino 0 54 bull ( MiMic Mooas Clear Lgtuii laquo s s J 4 i Qfn 8 d S o t i i i r i c H u i S-eam Engines 9 S 4 7 - 5 bull n I ati I laquoam to r BS-4 7ir Write IAC41K C o i j e - M i FCM 7 7 - S l o r v laquo J 1-f S e i ampampbull raquo Graham Central S i a l u n 334-2763 Oeep Pup-e S tormbungv B S 4 S A J 7 I h e Uocaio Uruthors

[bullbullbullbull

Oionne Warwicko r r n n C a r r e Y e j 0^1046 Soi l i A Cior is I il P a y lor Voo SS1-2S40 A m e n t a bull - bull bull bull raquo HS47AS7 a v i o n Ligttgot C c - J On tne S t - i i 3 rgt BS4 720t Frans S iaa t a the Mam E v a n BS4-270J I h e Aliman Biurhers Danrl Hal a P e a c h 7C4-310

0 - I O - raquo iwegjates O c l a n K e I H VHU N O ITtV iarSf A a gt B s n v o c a l U A H O - gt 2 O laquolaquort A e a M w r I eegt I M gt llBnaaAMnf i l p e i a O A t i j S MaHAI U i a Lraat c n 0 laquo Monce H O - 2 O I G e o a n Mh(eiu Blrmg O n a t l n u r j 10 I 7 M N N Musit ay bullEORIJA Gaivhwin HO 17114 Vacch I A r - l w c i a s o raquoK1 V laquo P a n iitarn UaaltC -10 bull laquo raquo CadSft V a gt r laquo a u - M laquoraquogtbullbullbull e 1 MO laquo gt C e r a r i f a i 4 S H O I T S bull e s a l ol trumcarw H O O H

NONESUCH

J V C Wnnawir C O ^ Sound C 0 4 U MCi New Clat igte S a u r s n T h fgtoClaquo ogt the Day C04H-SO0 tna i at m i Ftm Themes t i e Apr I Fool CD40 SOW bull D e a n id S a o m i h a Smms L raquo Src COAB l O M Loeraquo Uogt a r4 0 raquo E C ea t Alm-e Then-as H 8 - gt - 4 O M raquo V ) by S a e i C D 4 8 V X cn i i ie A i r v s r a I h e Per iana l AtpM-s laquobull J e t CD4B-boO l a l n Fn-ytim F a i u v a C 0 0 SCOfl bull bull bull Ik A D ami t l e a r w HigOy COIU ( C n e n Green C m d Homo Ceonpy Sohg C W M M t C Bock A OrurMF eo C D U W I 7 Hahim HoCurne F a s ^ i n a h i u tone raquo C D 4 B - V I Mdoo i a a y J a m w i M B M WfiSfltl C O a B i O 6 You i r a n P n u m Sane C P mdash Wgt1 Bruace t i e r I - t^bleo Wa-ET C O U W73 U e s n c Ino H laquo t a 4 - a t C D i D Mgt ) bull bull lt bull bull gt i i ^ i M I R Vocal CD4Bb02a D a f i m u IltunpelSFlight ol I i o llumblo B e e C 04H SO- Tnnk NnjaiMariT Vocai C 0 4 0 S029 Oodial het I l a n e bull S a raquo C 04d- S031 I h e S h a d e ol Vaur S T I O bull a n t a i t K S r m c COH M37 la th i 0 t s S o r - i n raquo 9 Wheal CO t l raquo J J J t - e e V s c t w e s o i i i S c e e n l l e m e i the Utaeeat CD-O-SAOe V K V a CO S o laquo d Orchaik-a CaceKeei CD 4 Scanc l mi COQ-MXV Ino Mrxo t S e e V o o a laquo o CD46 SCiS Mma Aoo D 0 M v emele Vocal C04Q-6C09 V U I I F in Sui t h e DiinaiiampioR igtlaquoup C0laquoB-S04C Viclut O c h e s l r a ann Lal in Mtythni n l a t in Fest ival C04 t WM7 raquo0llaquo 4 H o c CD4D S044 h e Gamota Atootj bSectric S e r v o s CDJU Mi d p A i u n v - r a a i d o P e t s [ bull laquo - gt bull i S R - CUrlaquoalt CplraquoWl H l A i w - m o t s a n e o t r e -Gogtoe J a m S e n - o c s al J v raquo C O B i D 4 raquo VtOM O t h e s u a the la teM S i r e e n Uusi r Best i U M W P CO 4 Hound G t i n e s l r a CO 4 Ouuna Saecialr Also SpHCh ZarathutlM CD4B-W63

i n J o o i s oi i n Madonna r n-rioiso c o a w - o o t Wlaquo S h a l C04W COJ T - e gtVM F r a n c a Lagt COf t t o i Oayraquo O 1 raquo 0 - raquo raquonlaquo Cne i ry e raquo o i v x raquo i c o m rooa u v i w i f ^ i C O M M O N art e u i e i and The a a t f W e laquo o r B a r i ClMW Mambo J a m b COtnlOOr I h e Wuild ot Michel Legrand O O l f l TON Godlalher Sound ol C I N E A n i o n CO4W-7010 Trie Gudla lhvr h i r i Hosso CII4W-7013 nr Rosso m Concert C D 4 W 7uii Mandohn Aare rade C04W Jtl One t v l a d y lgtve i t t n HIRR -k iAasa i Mat Wadroe C O - W T O u^oMerbull Scroer M C C O W lt3raquo fluilaquoieraquo F raquo S o e i K e P i n C O ) 370 Cva-seto Puteeto P a a s d a L a C u r a p a r s a a C I M W - W i G a m M I lor C i M a A K M laquo of Pear la C 0 4 W mi Qlenn Mdler O c h e s n o MoOiHOl I SerenaOU COlaquoV( J024 O r q u a s l a F i e n c i m P o n b e r Innguora f torc in i m t n Pointer UMVI - 07S L o d y S i r n s t h o U l u e s C04W 1039

W a r n Arnotitaa SCroae C D 4 W 0 3 I

j a c k ce Weio A l l Maraquoraquo H a - a - a n S c e 4 m CO-4 C D 4 W - 7 0 J 7 I f i a F I S M - i l Orf nes i ra I h e PtneaJon A o e o r t w e CIMW-7D) L I S Qui la I u a i E i C o n c o i P a s a i J I Paul Voder and Hi B r a s s Orchestra Marches ol thn World II CIMW- fUa L o s Qui) la l luasi l a Cumparai ia c r Tha F i lm Hi Mini Orchestra Ihomea Irom 0 0 S a n a a C04W I O J P a r P-e-to e J Hn C-renei l a P e i a i Prado bulllt CO-4 C O W - I O U Franc I N T u O r a ^ a u a S y n p e o n i c a C o - S - a r a e l l a r p o M C O - C 0 4 W r o raquo N - I n o i s e Mini P M H Piays Weite-RI Wu1v I n e m e CD4W7DMI Sonny Roll i n Sonny noHini In J a p a n CD4W7DS9 Nlnl ROSSO Nini R o s s o P i a i Franei-i l a i C 0 4 W 7 C W raquo l u S e a s Giar-d O r c r i e W a Poetry ol m e S o a C 0 4 M uo t l o c o m o l v S e a n e m C O CU K-ltOBl I K fen htm VO raquo s - o S u t s - C 0 4 K r o u l r t laquo m N f u WH 71 S r laquo - S u t j a C4HR JOB) LeOMMlaM S c a i d i m C O - vol C D K roo B i t CaPSen raquogtS- ig t - Bando yomuii Syrrpnony C04A-raquoi01 M I I H Piano ConceHo M Wakaraquoy l Symphony L04KW B a t n OrandorBure Concerto S o il Deutsche O i c h SeaMen CD4M-7SO) Khechaiu ia r Violin Concer to I Toauraua T h Taraquoyo S y e - a h o r C O SO Bltlaquo I 4 bull - bull D Mtnoar A erefteaim CO-740 V a i c i raquo i - e Sonaia Ho 4( S C a t f e a o n C O K laquo raquo Beeihovn ho 1 t 3 - c a K M i i v i J - bullbull bullbull Symphony C O SSO Beethoven ho S C c i o U m bullbull bull bull bull Gewandnau Symphany COetV111

U e e i l o r e r ho 6 Pas tara e K M a m G e e a n d h a u s Symphony C O K 7 4 Wahte Sympnony No f T laquoahina O i a h a Philharmonic Orchestra bull i - bull bullbull 1

He(mirt W e s O a i m a n e D e v t s c n Ba^ io t isson J S Bacfw l a ^ u i i r e i O a r r t C O U S H M i i C - i - c s - g S y m s n o - y No 7 A MafC Op Kl H Men e Pramel- euv O r M J i a Op 3 h i g Slephon Ove lu ta Op t7 CD4K-7S17 K M a s u r G laquo h d n n O r c h l e p n g Syrripriony No B Ma|or Op 607 Iho C o n i e c i a h o n ol (he House

Overture Op lt flulm ol Atrani Ovnrtua Op 13 CD4K 7470 H MJiur Gearanor iau i Orltn l laquo ( i i g

I C Maior Op 211 5ymone-y a raquo I Mo- Op W C O lt - 47-ur t U i h i o t a i ^ V I - i O r e L e p l r g B e e f K ^ e r W v c raquo C ~ llt9eraquo0 C T M - W Vat iay HK) J C laquo bull J o l Hala u e e t n c e r - S o r raquo t a or Voln a r ^ Pano No S Spi a bull laquo)C Op 2 i o n a t lor Viioim and Piano ho S G M a p O p 3D CD4R-S2S Beo-ho-en Compioto Sot ol h-e S y m p h o n e s K Masur Gawandnaus Symphony C04K7amp3U

PROJECT - 3

P o a S c a o t i x a J Test Ctect-C PR-S01 CO l e o c a i n i r t S w S i n i l PO-WOOCO Uibie G i e e raquo bull e n l y - C n e I omhone P P - raquo 2 C n 1 laa ison B It HarjQaM Wone s Grenlosl Ja tbend PR-S033CD E n o c n l l g h i h a Brass Manaqana P n - raquo 1 B C D Tony Mot tola I h e Best ol T B hy Mottol PR- lCHiCU

Oul W c r B K B a c - w a c h i t a Beatles P R i O K D f neen L i c t i Perngtraquolaquo Potyafto-M r- ieBCO I bull lpnraquo I h B ig B a n d H4laquoot 10 praquo-soflCR f noch LioM Iho B ig B a n d Hi oi raquohlaquo -JOS A 0raquo PP-MS8CD F n c c h Light tno B r a s Managa- e H PO-400CCD tony Moltol Super tar M M Pfl-SOBTCD laquo Cnannei D e r bull ( PR SOteCl) t a n A 4 gt m c M M

t^ P R - 4 0 7 X O Bil B a r l ~ i- bull i 40 P R - U T t C O t n o c h I Q M Tutu-a Sound Shoe P R - 4 C 7 C O lony Moltol 4 the Q u a d bull i - P8-W7BCD The Kasnvii ie jot i

N o - P R - S O W D E n o c n U B N T e G-ea ta M o v e I n a m e i or the Oecade P R - S W I C O looy WoOora B i a s V e n a e P S I - 4 0 B K D E n o m I I M ahd ( bull bull r v j B e a f l e s C i a s s K S Pft-SOMCO E n o c n U g M ai-fl B r g a J Grea i Hi-s From i n GaHby pound a H H O l f C a Bg Banc HI Ol Ihe IDs Vol 3 P f l - M K O l i p O l The IcoOOO P H S W I C D

SOUND BIRO SHADYBROOK c - x n S B 4C7 Love Ihe One V o bulllaquo Wgt SB4-7SOB EropencMi SB4-743 Aaiokoning S 8 4 - 4 t 0 S o Lines in Mohan S B - 5 0 l G r e e n Guard South S B ^ 4 0 7 I a s l Train to Waterloo S B 440) Storm 4 The S e a S04 4441 M y i h c Mooda L o v e Iho O n e Vou r a With B S - S 5 7 raquo WyWk Wsods

- i j h i i a y O B S - Scone I T I A c raquo n JBSM 2e ie

WystlC UOCfCS A a k trade o BS4-26F0

M1ltC teootls L i c a i I t g t i Sounds ol Rai lway

S l a a m E n g i n e s B S - 7 4 l Lost Tram to Waterloo

(Rairroad S o u n d s ) B S 247

Mystic Mocds Frogenoua H 4 I M

Storm alaquo0 tne S e a B S J - J S S

A amp M

gt K W a m a -J - j r n e y to the Cenl ie e the Earth O U S 3 f i l Hr Wasoman Tho Myths and Legends ol k i n j Arthur And The Knighls o the Round lab ia O i l M S l Chuck i bull -C h a s a IN C l o u d A - e y 0 U - S 4 I 1 S

SINGCOHD raquogt i t o o w a o i

raquoappltnlaquoki i P - 2 S

- D I S C R E E T

Mutherraquo-Ov-nie l an ia t ion S 4 - 2 I 4 9 (rank 7gtppa Ape i f cor 5 4 - 7 S

CHRYSALIS

Jethgto lu l l Aqualung CM4I044 Jolhro lu l l War Chi ld C H 4 I 0 i T

CAPRICORN

A l m a n Br 0101 Baua bull bull bull bull I CX4-CI3

ATCO Q l a t Oak Aikar-sas Haunch N L ive Q07U1U Denny H a d w a y Ai lont ion at A Man OO-7029 D l c a Oak Arkansas bull bull bull bull I O t r a t O I 1 I N ^ G a n g

a m O O X - T C

VIRGIN Miraquoe O-Oirh) 1 afgtuilaquo B e n s OD13- I0S

RSO E r i c C lap lan bull U l Ocean OlirrJ O 0 4B01 L n c Clapton bull n i i one in Every C o e d 0 0 - 4 ( 0 6

FINNADAR Gootge Ftrntv J o t m C a o e 00-9006 F L I T S a l w a n Wiretap ODSCOS

ROLLING STONES Hill Wyman Monkey U ip 00-7fllOO

M I R R O R O

A kraquoi ogt Peap c n o u i e a t So S e e Arraane SchauOtoeck Dead Armaad S c i a v S C mm

FANIA Harlow l i v e in Quad O X S L P 0 0 4 7 7

(9

Gbming to terms with quadra phonic Every new technological advancement brings wilh II its own unique language Words that suddenly mean something different than theyve ever meant before Words that have been invented to describe the features and functions of a new invention

Quadraphonic soundmdashan invented term in itselfmdashis no different To help you undershystand 4-channel sound reproduction on its own terms we offer the following glossary of quadraphonic vernacular

a m b i e n c e A sound characteristic resulting from reverberancemdash such as the effect that occurs in a concert hall when the direel sound tgtf an instrument reaches your ear a split second ahead of the same sound after its been reflected off the walls and ceiling of

the auditorium carrier The primary signal transmitshyted in radio broadcasting Also used to describe the ultrasonic frequency signal that provides the two addishytional discrete channels on the CD-4 Quadradisc C D - 4 Stands for Compatible discrete 4-channel The only full range discrete 4-channel disc system on the market Bears the trade name Quadradisc channel A sound path Monaural (mono) systems utilize a single channel Stereo uses two channelsmdashleft ltL and right (R) Quadraphonic sound has four channelsmdashloft front (Lf) right front (R1) left back (Lb) and right back (Rb) c o m p a t i b i l i t y The ability of source material to be used equally well on monaural stereo or quadrashyphonic playback equipment crosstalk A blending of Information between one channel and another which reduces

separation and decreases the full dynamics of the original master recording Particularly detrimental to quadraphonic sound accuracy-d e c o d e r An electronic device that takes matrix encoded signals and translates them into 4-channel output d e m o d u l a t o r Circuit used to extract the four discrete channels from the CD-4 Quadradisc d i s c r e t e A constantly independent audio signal such as those stored on each track of a master tape Also used to describe the type of sound produced by the CD-4 Quadradisc system D o r r e n s y s t e m A discrete 4-channel FM broadcasting system Named for its inventor Lou Dorren d y n a m i c r a n g e The volume span between the softest and loudest sounds or electrical signals t o u r 4 ) - c h a n n e I s o u n d See quadraphonic sound i n t eg ra ted c i r c u i t The IC or ch ip A mi nature electronic circuit sometimes as small as a pinhead that performs the same equivalent functions of larger conventional circuits Has provided the means to put complex electronic cirshycuits into equipment with relshyatively compact dimensions

joystick A pannlng-typo audio control designed to facilitate 4-channel balancing Usually on the panel of the d-channel receiver Performs the same function as separate left-right Iront-rear controls logic A special circuit in an SO matrix decoder that elecshytronically reconstructs some of the quadraphonic effect lost during the SQ encoding-decoding process Various degrees of logic are provided in playback equipment but only a full logic circuit has the ability to reproduce quadraphonic recordings with separation approaching that of present stereo recordsmdash and then only under special conditions matrix Any system that reproduces quadraphonic sound by mixing 4 channels into two (encoding) and elecshytronically returns Ihem to four channels (decoding) during the playback process Also referred to as the 4-3-4 system phase lock loop A feedback circuit that maximizes frequency acshycuracy and stability in FM tuners and multiplex do-coders Also used to assure utmost accuracy in CO-4 demodulators Quadradisc The trade name for the CD-4

discrete 4-channel record q u a d r a p h o n i c b r o a d c a s t i n g 4-channel transmission via FM signal Although no standard system has yet been adopted tests are currently being conducted in both the matrix and discrete formats Since FM broadcasters consider matrix to be basically a stereo system tho greatest test interest has been in the discrete area The selection of a standard 4-channel FM system is expected about a year after those tests are concluded and the results submitted to the FCC q u a d r a p h o n i c s o u n d Also called quadrasonic and often shortened to quad All refer to the sound field created by inshyformation being recorded and reproduced from four different directionsmdasha 360 degree circle of sound with the listener in the middle This is accomplished by recording four separate channels on a master tape then reproducing them through four separate amplifiers and tour separate speakers in the listening room Considered by many experts to be a greater advancement in sound reproduction than stereo was to mono QS See RM

Q-8 8-track tape cartridges containing 4-channel programming R M Stands for regular matrix Also known as the QS system separation The degree of isolation maintained during the stereo or quadraphonic recording and reproduction process The opposite of crosstalk A high degree of separation prevents dilution and distorshytion of the sound field present on the original master tape Shibata stylus An advanced stylus design created to reproduce the discrete 4-channel disc yet provide perfect compatibility wilh existing stereo or monaural records Permits retrieving ol signals up to 60000 Hertz Also provides longer record life than elliptical stylus tracking at the same pressure SQ The matrlxing method developed by CBS Records for encoding four channels of sound into two channels Stands for stereo-quadrashyphonic synthesizer Electronics that enhance 2-channel recordings when played through a 4-channel system

0

QampA4 Even though quadraphonic sound has been around lor many years now there are a number of disturbing quesshytions that still cast their shadows on the efficacy of the 4-channel medium Since one of the prime functions of this publication is to shed more light on the field of quadraphonic sound we present the questions we most frequently encounter about 4-channel sounds present position and future potential along with answers we hope will reduce some of the unnecessary apprehension that surrounds ft

Whoro is 4-channel sound golm In tho U S Is it a s many say dying out a s a market entity

Quadraphonic sound is more alive than it over has been and its jutting healthier al l iho lime Today however the audio industry h a s a much more realistic view ot its growth potential it has nol become as somo initially professed a complete revolution in Ihe marketplace nor w a s it ever realistic to believe it would bo Quad Is not a revolution bul instead an evolution An orderly growth In Ihe hardwaro markal-place goared to a s fast a softshyware growth a s can be reasonshyably oxpected from record companies

In addition new technological achievements in quadraphonic integrated circuitry have recently made their appearance Which now m e a n s better performance al a lower pr icemdash and an Incroaso in the market potential Add lo il the fact that quadrashyphonic software re leases continue to emerge quadrashyphonic hardware s a l e s continue to grow and many touring rock groups and motion picture theatres have now converted to quadraphonic sound systems It simply m e a n s that 4-channoi sound is very much alive and its growth rate may surprise us al) very pleasantly

Whon will the battle ot Ihe systems bo over and who will bo tho winner

In the tape format there are no competing systems With Ihe disc however there is on the

surface al least a battle between two matrix systems and one discrete d isc system Our advice to tho consumer is simply IfiHl he shouldnt worry about any battle Just buy the program material he wants rogardiess of the format Nearly al l new a-channol recoivors provide circuitry lo reproduce both matrix and discrete formats s o tho consumer really wont have 10 make any choice at all From our point of view the battle ol the 4-channel d isc is a l s o over There is only one real 4-channol discmdashthe CD-4 Compatible Discreio Disc As we sou tfio luiure ot the quadrashyphonic d isc the discrete catalog will grow rapidly and ovoniually tho matrix sys tems will bo relegated to their primary r o l e -enhancement of stereo product

Are rclai l dealers responding favorably to 4-channel in both hardware and software markets

As dealers and sa lesmen on Iho tetail level gain greater ox-porionce in the 4-channel medium their response is beshycoming increasingly more enthusiastic Software dea lers are now asking for larger s locks ot Ouadradiscs Audio hardwaro dealors are devoting more display and demonstration s p a c e to 4-channet equipment In lact those dealers who have mndo a lull commitment to 4-channel are finding that it is representing a larger and larger portion of ihelr overall business The key to quadraphonic growth however is knowledge and the dissomination ot accurate understandable information about it Wo hope this publ icashytion will help toward thai end

Is 4-chnnnel software gelling easier lo l ind

The prime (actor a record retailer h a s to consider is product movement He h a s to give the most room to tho product that moves through his store the quickest There is no question that currently stereo records are that product However with more and bolter 4-channel records becoming available and a more positive attitude about the future o tho 4-channel d isc s a l e s of quadrashyphonic product are moving closer to those of stereo product accounting tor a moro significant share of the retai ler s profit For thai reason alone Ihe availability of 4-channol software has Increased dramatically in the past year Add to that the tact that record producers now see the potential of iho 4-channel disc and are recording more and more of their artists In this medium A bigger quadroshyphonic catalog means groator consumer interest and n correspondingly great avai lashybility of 4-channel soltwnie at the retail level

laclurers can bring out throe or four models of electronics Add to that the material shortage caused by such an unpredictshyable thing a s a petroleum shortage A s 1974 progressed however there was a significant re laxashytion ol the compound shortage and quadraphonic re loasos aro back on schedule Right now the total availability ol CO-4 product in the US gts about 200 and the hopes aro to at leasl double that number by the end ol 1975

Is a 4-channol sound syslom a lot more expensive than a stereo s y s l e m

How last is the 4-channel software catalog growing and how fast will it grow in Ihe lu iure

Il is difficult to view ihe giowfh ol the catalog apart from tho worlds economic developments There is a lways a shortago of product during tho initial introduction of any soltwaro medium because it is simply impossible to c r e a t e a catalog of 1500 or s o items in a s short a time a s hardware manu-

What do 4-channel records c o s l

CD-4 records cost only slightly more than stereo recordsmdash about 20 on tho averagemdashyet doiiver twice a s much informashytion and an exciting new musical dimension to the listener

What Is Ihe playing lime of n 4-channel d i s c

Essential ly the s a m e a s a stereo d isc

Will a 4-channel d isc sys lem still play my slereo r e c o r d s

Absolutely Any system designed to play CD-4 records will a lso play any standard stereo recordmdashbul with a now degree of depth possible only with a 4-channel playback s y s shytem

Since additional circuitry and additional speakers a re needed for 4-channel reproduction a quadraphonic system is initially more expensive than an equishyvalent slereo system However with new developments in ICs and 4-channel technology oxcellenl quadraphonic systems can now bo a s s e m b l e d lor about tho s a m e outlay a s a modlum-pneed stereo system Qui whatever ihe additional cost any truly involved music lovor who h a s already mado tho 4-channel Invesiment will loll you thai iho new experience in lotal sound it provides Is well worth itmdashand more

Are 4-chann-l records any more difficult to handle than o s lereo r e c o r d

No Simply c lean them frequently a s you would a standard stereo rocord uso Ihe proper stylus pressure and youi CD-4 disc should deliver the same amount or even more performance lite than tho samo stereo d isc

As a recording engineer 1 have always fell that any quad disc system must offer the listener true concert hall realism and spatial integrity To achieve this result it must have the same degree of separation which is inherent in a 4-channel master tape In the long run the conshysumer will be satisfied with nothing less CD-4 has evolved rapidly over the last two and one half years and represents the only practical disc system embodying discrete performance

It takes someone with a special kind of artistic apshypreciation to comprehend the aural magnitude of quadraphonic sound Someshyone who wants to hear more than sound listen to more than music Someone who is totally involved in the music a s well as the medium If youve taken tho time to read this entire booklet youre that someone And if youd like someone who feels the same a s you do to keep you informed about the latest developments in quadraphony simply send your name and address to

JME Associates 6363 Sunset Boulevard Hollywood California 90026

A free copy of our informative newsletter CD-4 Forum will be sent to you each time its publishedmdashour way of saying thanks for being someone specia l

John Eargle Is ono of Americas foremost aulhorltles In the field of sound recording His present company JME Associates is a consultant to the CD-4 advocates Panasonic JVC RCA Records and tho WEA Record group in areas relatad to four-channel technology He holds the Degrees of Bachelor ol Music Bachelor of Science Master of Music and Master of Engineering Mr Eargle has written and lectured extensively In areas of recording technology He is a member of the Acoustical Society ot Amorlca a senior member of tho Institute of Electrical and Electronic Engineers and currently president of tho Audio Engineering Society

We gratefully acknowledge the mutual cooperation of JVC America Panasonic Technics by Panasonic RCA Records and WarnerElektra Atlantic Records in the publication of this booklet

Matsushi ta Electr ic Corp of Amer ica 1 Panasonic Way Secaucus New Jersey 07094

JVC Amer ica Inc 50-35 56th Road Maspeth N Y 11378

RCA Records 1133 Avenue of the Americas Now York N Y 10036

Warner Communicat ions Inc 75 Rockefeller Plaza New York N Y 10019

John Eargle

0

QampA4 Even though quadraphonic sound has been around lor many years now there are a number of disturbing quesshytions that still cast their shadows on the efficacy of the 4-channel medium Since one of the prime functions of this publication is to shed more light on the field of quadraphonic sound we present the questions we most frequently encounter about 4-channel sounds present position and future potential along with answers we hope will reduce some of the unnecessary apprehension that surrounds ft

Whoro is 4-channel sound golm In tho U S Is it a s many say dying out a s a market entity

Quadraphonic sound is more alive than it over has been and its jutting healthier al l iho lime Today however the audio industry h a s a much more realistic view ot its growth potential it has nol become as somo initially professed a complete revolution in Ihe marketplace nor w a s it ever realistic to believe it would bo Quad Is not a revolution bul instead an evolution An orderly growth In Ihe hardwaro markal-place goared to a s fast a softshyware growth a s can be reasonshyably oxpected from record companies

In addition new technological achievements in quadraphonic integrated circuitry have recently made their appearance Which now m e a n s better performance al a lower pr icemdash and an Incroaso in the market potential Add lo il the fact that quadrashyphonic software re leases continue to emerge quadrashyphonic hardware s a l e s continue to grow and many touring rock groups and motion picture theatres have now converted to quadraphonic sound systems It simply m e a n s that 4-channoi sound is very much alive and its growth rate may surprise us al) very pleasantly

Whon will the battle ot Ihe systems bo over and who will bo tho winner

In the tape format there are no competing systems With Ihe disc however there is on the

surface al least a battle between two matrix systems and one discrete d isc system Our advice to tho consumer is simply IfiHl he shouldnt worry about any battle Just buy the program material he wants rogardiess of the format Nearly al l new a-channol recoivors provide circuitry lo reproduce both matrix and discrete formats s o tho consumer really wont have 10 make any choice at all From our point of view the battle ol the 4-channel d isc is a l s o over There is only one real 4-channol discmdashthe CD-4 Compatible Discreio Disc As we sou tfio luiure ot the quadrashyphonic d isc the discrete catalog will grow rapidly and ovoniually tho matrix sys tems will bo relegated to their primary r o l e -enhancement of stereo product

Are rclai l dealers responding favorably to 4-channel in both hardware and software markets

As dealers and sa lesmen on Iho tetail level gain greater ox-porionce in the 4-channel medium their response is beshycoming increasingly more enthusiastic Software dea lers are now asking for larger s locks ot Ouadradiscs Audio hardwaro dealors are devoting more display and demonstration s p a c e to 4-channet equipment In lact those dealers who have mndo a lull commitment to 4-channel are finding that it is representing a larger and larger portion of ihelr overall business The key to quadraphonic growth however is knowledge and the dissomination ot accurate understandable information about it Wo hope this publ icashytion will help toward thai end

Is 4-chnnnel software gelling easier lo l ind

The prime (actor a record retailer h a s to consider is product movement He h a s to give the most room to tho product that moves through his store the quickest There is no question that currently stereo records are that product However with more and bolter 4-channel records becoming available and a more positive attitude about the future o tho 4-channel d isc s a l e s of quadrashyphonic product are moving closer to those of stereo product accounting tor a moro significant share of the retai ler s profit For thai reason alone Ihe availability of 4-channol software has Increased dramatically in the past year Add to that the tact that record producers now see the potential of iho 4-channel disc and are recording more and more of their artists In this medium A bigger quadroshyphonic catalog means groator consumer interest and n correspondingly great avai lashybility of 4-channel soltwnie at the retail level

laclurers can bring out throe or four models of electronics Add to that the material shortage caused by such an unpredictshyable thing a s a petroleum shortage A s 1974 progressed however there was a significant re laxashytion ol the compound shortage and quadraphonic re loasos aro back on schedule Right now the total availability ol CO-4 product in the US gts about 200 and the hopes aro to at leasl double that number by the end ol 1975

Is a 4-channol sound syslom a lot more expensive than a stereo s y s l e m

How last is the 4-channel software catalog growing and how fast will it grow in Ihe lu iure

Il is difficult to view ihe giowfh ol the catalog apart from tho worlds economic developments There is a lways a shortago of product during tho initial introduction of any soltwaro medium because it is simply impossible to c r e a t e a catalog of 1500 or s o items in a s short a time a s hardware manu-

What do 4-channel records c o s l

CD-4 records cost only slightly more than stereo recordsmdash about 20 on tho averagemdashyet doiiver twice a s much informashytion and an exciting new musical dimension to the listener

What Is Ihe playing lime of n 4-channel d i s c

Essential ly the s a m e a s a stereo d isc

Will a 4-channel d isc sys lem still play my slereo r e c o r d s

Absolutely Any system designed to play CD-4 records will a lso play any standard stereo recordmdashbul with a now degree of depth possible only with a 4-channel playback s y s shytem

Since additional circuitry and additional speakers a re needed for 4-channel reproduction a quadraphonic system is initially more expensive than an equishyvalent slereo system However with new developments in ICs and 4-channel technology oxcellenl quadraphonic systems can now bo a s s e m b l e d lor about tho s a m e outlay a s a modlum-pneed stereo system Qui whatever ihe additional cost any truly involved music lovor who h a s already mado tho 4-channel Invesiment will loll you thai iho new experience in lotal sound it provides Is well worth itmdashand more

Are 4-chann-l records any more difficult to handle than o s lereo r e c o r d

No Simply c lean them frequently a s you would a standard stereo rocord uso Ihe proper stylus pressure and youi CD-4 disc should deliver the same amount or even more performance lite than tho samo stereo d isc

As a recording engineer 1 have always fell that any quad disc system must offer the listener true concert hall realism and spatial integrity To achieve this result it must have the same degree of separation which is inherent in a 4-channel master tape In the long run the conshysumer will be satisfied with nothing less CD-4 has evolved rapidly over the last two and one half years and represents the only practical disc system embodying discrete performance

It takes someone with a special kind of artistic apshypreciation to comprehend the aural magnitude of quadraphonic sound Someshyone who wants to hear more than sound listen to more than music Someone who is totally involved in the music a s well as the medium If youve taken tho time to read this entire booklet youre that someone And if youd like someone who feels the same a s you do to keep you informed about the latest developments in quadraphony simply send your name and address to

JME Associates 6363 Sunset Boulevard Hollywood California 90026

A free copy of our informative newsletter CD-4 Forum will be sent to you each time its publishedmdashour way of saying thanks for being someone specia l

John Eargle Is ono of Americas foremost aulhorltles In the field of sound recording His present company JME Associates is a consultant to the CD-4 advocates Panasonic JVC RCA Records and tho WEA Record group in areas relatad to four-channel technology He holds the Degrees of Bachelor ol Music Bachelor of Science Master of Music and Master of Engineering Mr Eargle has written and lectured extensively In areas of recording technology He is a member of the Acoustical Society ot Amorlca a senior member of tho Institute of Electrical and Electronic Engineers and currently president of tho Audio Engineering Society

We gratefully acknowledge the mutual cooperation of JVC America Panasonic Technics by Panasonic RCA Records and WarnerElektra Atlantic Records in the publication of this booklet

Matsushi ta Electr ic Corp of Amer ica 1 Panasonic Way Secaucus New Jersey 07094

JVC Amer ica Inc 50-35 56th Road Maspeth N Y 11378

RCA Records 1133 Avenue of the Americas Now York N Y 10036

Warner Communicat ions Inc 75 Rockefeller Plaza New York N Y 10019

John Eargle

As a recording engineer 1 have always fell that any quad disc system must offer the listener true concert hall realism and spatial integrity To achieve this result it must have the same degree of separation which is inherent in a 4-channel master tape In the long run the conshysumer will be satisfied with nothing less CD-4 has evolved rapidly over the last two and one half years and represents the only practical disc system embodying discrete performance

It takes someone with a special kind of artistic apshypreciation to comprehend the aural magnitude of quadraphonic sound Someshyone who wants to hear more than sound listen to more than music Someone who is totally involved in the music a s well as the medium If youve taken tho time to read this entire booklet youre that someone And if youd like someone who feels the same a s you do to keep you informed about the latest developments in quadraphony simply send your name and address to

JME Associates 6363 Sunset Boulevard Hollywood California 90026

A free copy of our informative newsletter CD-4 Forum will be sent to you each time its publishedmdashour way of saying thanks for being someone specia l

John Eargle Is ono of Americas foremost aulhorltles In the field of sound recording His present company JME Associates is a consultant to the CD-4 advocates Panasonic JVC RCA Records and tho WEA Record group in areas relatad to four-channel technology He holds the Degrees of Bachelor ol Music Bachelor of Science Master of Music and Master of Engineering Mr Eargle has written and lectured extensively In areas of recording technology He is a member of the Acoustical Society ot Amorlca a senior member of tho Institute of Electrical and Electronic Engineers and currently president of tho Audio Engineering Society

We gratefully acknowledge the mutual cooperation of JVC America Panasonic Technics by Panasonic RCA Records and WarnerElektra Atlantic Records in the publication of this booklet

Matsushi ta Electr ic Corp of Amer ica 1 Panasonic Way Secaucus New Jersey 07094

JVC Amer ica Inc 50-35 56th Road Maspeth N Y 11378

RCA Records 1133 Avenue of the Americas Now York N Y 10036

Warner Communicat ions Inc 75 Rockefeller Plaza New York N Y 10019

John Eargle