PD Composition Structure Slow section, faster section Slow section, faster section GEMS GEMS A Practical Guide to Composition A Practical Guide to Composition Climax at 2.5 min Climax at 2.5 min Final slow section Final slow section

Pentatonic Scale Inspired by Composition Based on Pentatonic Scales: A Computer Aided Approach Inspired by Composition Based on Pentatonic Scales: A Computer Aided Approach Complexity of PD Patches Complexity of PD Patches E Flat, D, C, B Flat, G E Flat, D, C, B Flat, G Several Melodies Several Melodies Random Melody Generator Random Melody Generator Key changes possible Key changes possible

Pure Data One start bang, and a series of delays One start bang, and a series of delays Twenty-three subpatches. Twenty-three subpatches. Modular use of send and receive Modular use of send and receive One counter to keep track of current time One counter to keep track of current time Check boxes to see which pd patches are currently playing Check boxes to see which pd patches are currently playing

Instrument Patch Five instruments plus percussion Five instruments plus percussion Receive pitch, volume (velocity), and duration Receive pitch, volume (velocity), and duration Have channel to indicate voice: synth voice, electric guitar, piano, synth brass, helicopter Have channel to indicate voice: synth voice, electric guitar, piano, synth brass, helicopter Percussion instrument receives a variety of voices in the pitch number box Percussion instrument receives a variety of voices in the pitch number box

Percussion Motifs Repetitive motifs Repetitive motifs Use a variety of percussion instruments Use a variety of percussion instruments Metronome and counter create measure beats Metronome and counter create measure beats Selects used so instruments only play on certain beats. Selects used so instruments only play on certain beats.

Melody and Tune Two selects Two selects Note length Note length Pitch Pitch Key change possibilities Key change possibilities One metro to keep beat in measure One metro to keep beat in measure Repetitive 1 or 2 measure phrases Repetitive 1 or 2 measure phrases Harmonize used with fifths and octaves Harmonize used with fifths and octaves

Melody Generator Markov chain used to randomly generate pentatonic melody Markov chain used to randomly generate pentatonic melody