Mutable Instruments Ripples (used)

Analog, resonant and voltage controllable multi mode filter with four outputs, one of them with an integrated VCA. Mutable Instruments call the filter as undquot;liquid filterundquot; and that describes the sound pretty well.
Mutltimode filter with a 4-pole lowpass, a 2-pole lowpass and a 2-pole bandpass, all available simultaneously at individual outputs. Additionally thereundacute;s a 4-pole low pass output with an integtrated VCA (GAIN input and LP4undgt;VCA output) that makes creating a compact subtractive voice very easy. Self-oscillation is available for all modes and produces a clean sine-wave on the LP4 output. Unlike many classic 4-pole designs, this filter does not suffer from “loudness drop” when resonance is increased. The resonance loudness compensation circuit brings a slight tone coloration reminiscent of the Roland SH/Jupiter filters, with a very round and “liquid” resonance.

There are two CV inputs for the cutoff frequency – one with fixed 1V/octave and one (FM input) with polarizer. The resonance is voltage controllable as well.