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ADDAC SystemADDAC702 Dual VC Filter


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The ADDAC702 Dual VC Filter is a two-channel filter module inspired by the original Korg MS-20 but with an ADDAC twist perfect for filtering and adding distortion to a patch. It features two independent filters, one highpass, one lowpass. Both have cutoff and resonance controls with CV inputs and attenuators. A truly unique feature is the addition of CV slewing, which approximates the behavior of a vactrol to add slew to incoming CV. This can be turned on or off with a switch and the slew time can be adjusted using a trimmer. The filters both have selectable resonance clipping paths: off, diode, and LED-based clipping for adding crunch to the incoming signal. The resonance goes into self-oscillation even at low settings and can be altered by the clipping settings. There is also a distortion/fuzz circuit in each of the filters for additional fuzz and grit.

The filters can be seperate or coupled and linked together in parallel or in series. A mix control fades between the highpass and lowpass outputs and features a CV input with controls to invert the signal to allow for modulation of the mix in either direction. Each of the outputs has a phase switch to allow for additive or subtractive mixing. The NP|BP and BP|NP outputs allows the filter to output notch and bandpass effects based on the cutoff frequencies of the two filters. While this filter is inspired by the MS-20’s filter, it’s a wholly new beast.

ADDAC702 Features

  • Dual filter based on original MS-20 filter design
  • Diode or LED clipping
  • Distortion circuit in each filter
  • Optional CV slew that acts like a vactrol
  • Mix output with CV control over mix
  • Filters can be linked and can either be parallel or in series
  • Bandpass and notch filter types also available
  • Switch for the phase of each of the outputs
  • Eurorack module
  • Width: 16hp
  • Depth: 40mm
  • Current draw: 80mA @ +12V, 80mA @ -12V
ADDAC System ADDAC702 Dual VC Filter Reviews