Granular Synthesis on Audio Files
The goal is to create a patch that loads an audio file from which are taken tiny grains from random positions. The controllable parameters should be:
- Grain density: how many grains per second we expect to listen.
- Grain starting time: position of the loaded file that the grain starts.
- Grain length: how long the grains will be.
- Playback speed: how quickly will the grain be played, affecting the pitch of the grain as well.
Simple grain Generator
In the following example you can see a grain being generated in its simplest form. The source audio isn’t coming yet from an audio file, but from an oscillator that generates a sine wave at 100 Hz. The audio segment on the left side is then modulated by the envelope and generates a single grain that has a duration of 100 ms. (Kaliakatsos-Papakostas, 2016)