Pittsburgh Modular’s State Variable VCF is an analog filter module with a smooth, classic sound that is also surprisingly unique. The module offers a beautiful frequency range, especially in terms of filter sweeps and low- high- and bandpass filtering. Additionally, there is a fourth (variable) response that shifts between low-pass, notch, and high-pass.
Q Pot: Adjusts the resonance (Q) of the filter.
FREQ Pot: Adjusts the Frequency of the filter.
L-H Pot: Sweeps between lowpass, notch, and highpass filters.
QCV Pot and Jack: Resonance (Q) control voltage input and attenuverter.
FCV Pot and Jack: Frequency control voltage input and attenuverter.
1-Q Switch: Switch between Gain to 1 (VCA Mode) and Gain of Q (Standard Mode)
F-O Switch: Switch between Filter and Oscillator Modes