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Pure Data Composition

Pure Data Composition. By: Zainab Raza CSC 354 Music Seminar Judy Franklin May 1 st , 2007. History of Digital Music. Goes back to the 1950’s Experimentation with computer generated sound was started by Lejaren Hiller Illiac Suite for String Quartet

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Pure Data Composition

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  1. Pure Data Composition By: Zainab Raza CSC 354 Music Seminar Judy Franklin May 1st, 2007

  2. History of Digital Music • Goes back to the 1950’s • Experimentation with computer generated sound was started by Lejaren Hiller • Illiac Suite for String Quartet • not entirely successful, but led the way for further research on Artificial intelligence • Today, computer’s have the ability to participate in live performances

  3. Influences in my composition • Belkin • Foreground vs background • When too many sounds, we prioritize our perceptions • put the sounds I wanted to prioritize at given times in the foreground • Different ways to make certain sounds stand out • Volume • Pitch • Tempo

  4. Break • There are 2 points in my composition when none of the instruments are playing • This creates suspense, climax and buildup • Progression • Composition starts off with one voice playing, others get added in • At end, the voices slowly fade out

  5. GEMS Article • Dramatic Shape • Start the composition asssertively • Having one main climax • 60% of the way through the composition

  6. Outline • 3 minute composition • Used 5 different Voices (instruments) • Synth Voice • Voice Aah’s • Celesta • Steel Drums • Open Triangle - percussion

  7. Pure Data • Composition created using Pure Data • Pure data is a real-time graphical programming environment used for audio and graphics processing • Free and open-source • Objects used to create composition • Bang • Delay • Random • Makenote • noteout

  8. Used algorithms for the creation of music • Harmonize • MidiNotes2 • Playing of instruments controlled by complex system of delays • Volume control

  9. MidiNotes2

  10. Instrument 1 – Synth Voice • Works with harmonize algorithm • Length of note varies between 300 and 800 • Played on channel 1 and 2

  11. Harmonize subpatch • One note played at 55 • One at either 55+5 or 55+7

  12. Instrument 2 – Voice Aah’s • Works with nextpitch3 subpatch, calculates next pitch to be played • Note played on channel 3 • Volume for this instrument by the volume control loop

  13. NextPitch3 subpatch • Next note to be played is calculated in this loop • Loops between note values of 50, 53, 57, 63, 50, 58, 65 and lastly 75.

  14. Volume Control • A loop that controls the volumes of instrument 1 and 2 • The loop is initiated with the start bang • The volume goes from 40 to 100 in increments of 5

  15. Instrument 3 – Open Triangle • Percussion instrument • always played on channel 10 • Pitch controls voice for percussion • Volume for this instrument by the volume control loop

  16. Instrument 4 – Steel Drums • Steel drums are my personal favorite instrument • Love the sound • plays a random pitch between 35 and 85 • Notes are played every 0.05 seconds • Played on channel 5

  17. Instrument 5 – Celesta • Uses newpitch subpatch • In contrast to the steel drums which play lower notes, the celesta plays higher notes • Volume is also higher to go with higher pitches

  18. Newpitch subpatch • Note loops between 75, 79, 84, 76, 93, 78, 75, 82, 94, 78, 90 and 100

  19. Controlling the composition • Composition is started by a single bang and stops automatically after three minutes • Within the composition, different instruments are started and stopped according to complex system of delays

  20. Delays

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