A-100 Filters

Module Description Controls Inputs/Outputs
VCF 1 (24 dB Lowpass)

Voltage controlled 24 dB lowpass with transistor cascade (like Moog). The transistors are carefully selected for best sound. Resonance adjustable, 3 voltage inputs for filter frequency, 2 of them with attenuators.
  • Audio level
  • Frequency
  • CV 2
  • CV 3

  • Audio in
  • CV 1
  • CV 2
  • CV 3
  • Audio out
    • VCF 2 (12 dB Multimode filter)

    Voltage controlled 12 dB multimode with 4 simultaneous outputs. Lowpass, highpass, bandpass and notch. Resonance function, manual control and modulation inputs for filter frequency and resonance. Built with Doug Curtis CEM 3320.
  • Audio level
  • Frequency
  • FCV 2
  • Resonance
  • QCV 2

  • Audio in
  • FCV 1
  • FCV 2
  • QCV 1
  • QCV 2
  • Lowpass
  • Bandpass
  • Highpass
  • Notch
    • VCF 3 (24 dB Lowpass)

    Voltage controlled 24 dB lowpass with different sound compared to A-120. Built with CEM 3320 (standard lowpass principle like Oberheim) Resonance function, manual control and modulation inputs for filter frequency and resonance.
  • Audio level
  • Frequency
  • CV 2
  • QCV

  • Audio in
  • CV 1
  • CV 2
  • QCV
  • Audio out
    • VCF 4 (24 dB Highpass)

    Voltage controlled 24 dB highpass, built with CEM 3320. Resonance function, manual control and modulation inputs for filter frequency and resonance.
  • Audio level
  • Frequency
  • CV 2
  • QCV

  • Audio in
  • CV 1
  • CV 2
  • QCV
  • Audio out

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