Other extended chords follow similar rules, so that for example maj9, maj11,

and maj13 contain major seventh chords rather than dominant seventh chords,

while min9, min11, andmin13 contain minor seventh chords.

Altered chords[edit]

Main article: Altered chord

Altered chord on C with flat 5th, 7th, and 9th.   Play (help·info)

Although the third and seventh of the chord are always determined by the symbols shown

above, the fifth, ninth, eleventh and thirteenth may all be chromatically altered by accidentals

(the root cannot be so altered without changing the name of the chord, while the third cannot

be altered without altering the chord's quality). These are noted alongside the altered element.

Accidentals are most often used with dominant seventh chords. Altered dominant seventh

chords (C7alt) may have a flat ninth, a sharp ninth, a diminished fifth or an augmented fifth (see

Levine's Jazz Theory). Some write this as C7+9, which assumes also the flat ninth, diminished

fifth and augmented fifth (see Aebersold'sScale Syllabus). The augmented ninth is often

referred to in blues and jazz as a blue note, being enharmonically equivalent to the flat third or

tenth. When superscripted numerals are used the different numbers may be listed horizontally

(as shown) or else vertically.

Components

Chord

symbolNotes Audio

Chord Interval(s)

Seventh augmented

fifth

dominant

seventhaugmented fifth C7+5, C7♯5

 Play (help·inf

o)

Seventh flat ninthdominant

seventhminor ninth C7-9, C7♭9

 Play (help·inf

o)

Seventh sharp ninthdominant

seventh

augmented

ninthC7+9, C7♯9

 Play (help·inf

o)

Seventh augmented

eleventh

dominant

seventh

augmented

eleventhC7+11, C7♯11

 Play (help·inf

o)

Seventh flat

thirteenth

dominant

seventhminor thirteenth C7-13, C7♭13

 Play (help·inf

o)

Half-diminished

seventh

minor

seventhdiminished fifth Cø, Cm7♭5

 Play (help·inf

o)

Added tone chords[edit]

Main article: Added tone chord

Suspended chord (sus2) and added tone chord (add9) both with D (ninth=second), distinguished by the

absence or presence of the third (E♭).[34]

An added tone chord is a triad chord with an added, non-tertian note, such as the commonly

added sixth as well as chords with an added second (ninth) or fourth (eleventh) or a

combination of the three. These chords do not include "intervening" thirds as in an extended

chord. Added chords can also have variations. Thus madd9, m4 and m6 are minor triads with

extended notes.

Sixth chords can belong to either of two groups. One is first inversion chords and added sixth

chords that contain a sixth from the root.[35] The other group is inverted chords in which the

interval of a sixth appears above a bass note that is not the root.[36]

The major sixth chord (also called, sixth or added sixth with the chord notation 6, e.g., "C6") is

by far the most common type of sixth chord of the first group. It comprises a major triad with

the added major sixth above the root, common in popular music.[7] For example, the chord C6

contains the notes C-E-G-A. The minor sixth chord (min6 or m6, e.g., "Cm6") is a minor triad

with the same added note. For example, the chord Cmin6 contains the notes C-E♭-G-A. In

chord notation, the sixth of either chord is always assumed a major sixth rather than a minor

sixth, however a minor sixth interval may be indicated in the notation as, for example,

"Cm(m6)",