Dr. Ahmed G. Abo-Khalil

Electrical Engineering Department

Low-freq. oscillat

Low-frequency oscillation (LFO) is an electronic signal, which is usually below 20 Hz and creates a rhythmic pulse or sweep. This pulse or sweep is often used to modulate synthesizers, delay lines and other audio equipment in order to create effects used in the production of electronic music. Audio effects such as vibrato, tremolo and phasing are examples. The abbreviation is also very often used to refer to low-frequency oscillators themselves.

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