PD Composition StructurePD Composition Structure

Slow section, faster Slow section, faster sectionsection

GEMSGEMS A Practical Guide to A Practical Guide to

CompositionComposition Climax at 2.5 minClimax at 2.5 min Final slow sectionFinal slow section

Pentatonic ScalePentatonic Scale

Inspired by Composition Based on Pentatonic Inspired by Composition Based on Pentatonic Scales: A Computer Aided ApproachScales: A Computer Aided Approach

Complexity of PD PatchesComplexity of PD Patches E Flat, D, C, B Flat, GE Flat, D, C, B Flat, G Several MelodiesSeveral Melodies Random Melody GeneratorRandom Melody Generator Key changes possibleKey changes possible

Pure DataPure Data

One start bang, and a series One start bang, and a series of delaysof delays

Twenty-three subpatches.Twenty-three subpatches. Modular use of send and Modular use of send and

receivereceive One counter to keep track of One counter to keep track of

current timecurrent time Check boxes to see which Check boxes to see which

pd patches are currently pd patches are currently playingplaying

Instrument PatchInstrument Patch

Five instruments plus Five instruments plus percussionpercussion

Receive pitch, volume Receive pitch, volume (velocity), and duration(velocity), and duration

Have channel to indicate Have channel to indicate voice: synth voice, electric voice: synth voice, electric guitar, piano, synth brass, guitar, piano, synth brass, helicopterhelicopter

Percussion instrument Percussion instrument receives a variety of voices receives a variety of voices in the pitch number boxin the pitch number box

Percussion Motifs Percussion Motifs

Repetitive motifsRepetitive motifs Use a variety of Use a variety of

percussion instrumentspercussion instruments Metronome and counter Metronome and counter

create measure beatscreate measure beats Selects used so Selects used so

instruments only play instruments only play on certain beats.on certain beats.

Melody and TuneMelody and Tune

Two selectsTwo selects Note lengthNote length PitchPitch

Key change possibilitiesKey change possibilities One metro to keep beat One metro to keep beat

in measurein measure Repetitive 1 or 2 Repetitive 1 or 2

measure phrasesmeasure phrases Harmonize used with Harmonize used with

fifths and octavesfifths and octaves

Melody GeneratorMelody Generator

Markov chain used to randomly generate pentatonic melodyMarkov chain used to randomly generate pentatonic melody