Liquidus

filter 4 pole lowpass

Liquidus is a warm, compact 4hp 4-pole lowpass filter featuring new stock of the SSM2044 chip, made famous in the Korg Polysix, Mono/Poly, Crumar Bit 01, Emu Emulator, Emu SP12, and PPG Wave, amongst others. It features CV over resonance and filter frequency. It is a great sounding, creamy, fat little filter with good range and well behaved resonance. Its small form factor means it will fit in the coziest of systems including skiffs. The frequency CV is volt per octave so you can do a tracking filter or create pinged filter percussion effects, or go into self-oscillation to act as an experimental oscillator. The filter also has a separate EXP control input with attenuator to allow fun stuff like FM patches. It excels at filter FM, creating very smooth audio rate modulations. Add true fat vintage warmth to your system in just 4hp!

http://www.circuitabbey.com/Liquidus.html