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Published byFay Carpenter Modified over 8 years ago
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Granular Synthesis
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Pre-Class Music Jon Nelson Scatter
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Granular Synthesis Overview Any sound can be thought of as containing discrete particles. (Mosaic or Pointillism) A grain of sound typically lasts from 1 to 100 ms. Each grain shaped by an amplitude envelope. very short envelopes, and envelopes with sharp curves, produce added frequencies in the spectrum. Sound parameters (pitch, panning, duration, envelope, location in sound file, wave type, etc) change on a grain- by-grain basis. Parameters are static within each grain.
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High-Level Organization (1) Synchronous and Asynchronous. quality of synchronicity refers to how parameters are controlled relative to each other, usually grain duration, panning, amplitude, density of grains, and transposition. Pitch-Synchronous Overlapping Streams Tone Machine in Kontakt. Pre-Analysis needed. The result is something like a pulse-train, or buzz generator (think vocal cords), with changing formants. Works best on soundfiles with changing spectra, and often turns up in electronica as a rhythmic ostinato.
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High-Level Organization (2) Quasi-Synchronous Streams Grain length modified, but grains generally follow at regular intervals (related to AM). Can be used to time- stretch/compress and transpose sounds. The number of overlapping streams, along with the grain length of each, can enhance or diminish the AM/tremelo effect. Asynchronous “Clouds” all parameters independently controlled. Roads refers to a precisely controllable water jet-spray nozzle.
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Reading Roads, pp. 168 - 184 Kontakt manual, description of Tone Machine and Time Machine.
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