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Homework #5: "Radio Play" (employs dynamical systems)

The assignment is to create a short radio play with a recorded text, stereo audio effects and sound effects. Shoot for a duration of around 120 secs (plus or minus 30). This is a demo to introduce several techniques which will be described below. Though it won't be strictly-speaking a binaural recording, it is intended for headphones. Techniques include localization with interaural intensity difference (IID), interaural time difference (ITD), Schroeder-style reverb, and phasevocoder processing for time warping and pitch transposition.

Tools at your disposal

  • your homebrew microphone
  • something to record into (e.g., laptop/desktop)
  • Pd patch ~cc/220a/pd/pwrAndDelPan.pd
  • Pd patch ~cc/220a/pd/phaselockedvoc.pd
  • optional: ChucK (for creating sound effects)
  • optional: TAPESTREA (for creating sound effects)
  • Freeverb & other Schroeder-style reverberator plugins available in Audacity, Ardour, ChucK
  • Audacity/Ardour (for intermediate + final recording/assembly)


What to do:

Pd lab4/hw5 instructions are here: [1]


As usual, turn in all files by putting them in your Library/Web/220a/ directory.

  • 1) your radio play, hw5.wav, should go into the 220a directory
  • 2) a short README text (readme.txt) file that:
    • describes your process/adventure, and perhaps the ideas (technical/aesthetic) behind the composition
    • gives credit, if needed, for the sounds you are using
    • describe any difficulties you encountered in the process
  • 3) if you used ChucK, your .ck files