Granular synthesis
Granular synthesis builds sound from many short grains. Each grain is a brief, windowed slice of an audio buffer played at a chosen time and pitch.
A granular engine can play grains at different times and pitches to produce changing textures. Serum 2 has a granular oscillator. A wavetable oscillator loops a single-cycle frame, while a granular oscillator plays brief windowed slices that may span multiple cycles.