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Pittsburgh Modular Filter State Variable VCF

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Pittsburgh Modular Filter

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.

Filter Features

  • 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
  • LOW Jack: Lowpass Output
  • L-H Jack: Output based off of the L-H Pot
  • HI Jack: Highpass Output


  • Size: 12hp
  • Depth: 35mm
  • Power Usage: 31mA
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