Computer Music: Musc 216
LFO (Low Frequency Oscillator)
Low Frequency Oscillator. An oscillator used for modulation whose
frequency is below the audible range of human hearing (20 Hz). Example:
Varying pitch (frequency) with an LFO produces VIBRATO.
Varying volume (amplitude) with an LFO produces TREMOLO.
[From EMU Ensoniq's Glossary of Electronic Music Terms]