A low pass gate (LPG) is a module in modular synthesis that combines the functions of a low pass filter and a voltage-controlled amplifier (VCA). It allows audio signals to pass through while attenuating higher frequencies and controlling the amplitude of the signal. When a gate or control voltage is applied to an LPG, it opens, allowing both the amplitude and the harmonic content of the signal to be shaped simultaneously. This results in a sound that has a natural, percussive quality, often described as “plucky” or “woody,” as it mimics the behavior of acoustic instruments where the loudness and timbre change together.
Synonyms:
lpg, low pass gates
