µVCF Manual

Overview

The µVCF state variable filter features 3 simultaneous filter outputs: a 2-pole 12 dB/octave low pass, a 2-pole 12 dB/octave high pass, and a 1-pole bandpass. It tracks 1 V/octave pitch input over a wide range and can be used as a low-distortion sine VCO when self-resonating.

Installation

See the Module Installation Guide for instructions on installing the module in your Eurorack modular system.

Front Panel

 

Controls

  1. FREQ
    Sets the cutoff frequency of the filter. The knob position is combined with the FM1 and FM2 inputs.
  2. Q
    Sets the resonance of the filter.
  3. FM2
    Controls the amount and polarity of the FM2 input. The input passes unmodified when the knob is fully clockwise, inverted when fully counter-clockwise, and has no effect when at the 12 o’clock position.
  4. Input Attenuator
    Attenuated the level of the filter input signal. The signal is unattenuated when the knob is fully clockwise.
  5. FM1 Attenuator
    Attenuates the control voltage of the FM1 input. When fully clockwise the input is unattenuated and tracks 1V / octave.

Inputs & Outputs

  1. INPUT
    Audio input to the filter.
  2. FM1
    CV input for the cutoff frequency. Attenuation is controlled by the FM1 Attenuator.
  3. LPF
    2-pole (12 dB / octave) lowpass filter output.
  4. FM2
    Another CV input for the cutoff frequency. Attenuation / inversion is controlled by the FM2 knob.
  5. BPF
    1-pole (12 dB / oct) bandpass filter output.
  6. HPF
    2-pole (12 dB / oct) highpass filter output.