Make Noise - Optomix (Rev.2)


The Optomix is a direct coupled, two channel low pass gate utilizing 4 vactrols to provide simultaneous voltage control over amplitude and frequency content of a signal. It is in essence, a VCFA.

Additionally Optomix offers a summing stage complete with an AUXiliary IN allowing for the chaining of multiple units to create larger mixes.



The DAMP parameter, unique to the Optomix, allows the artist to program the way the low pass gate responds to a decaying control transient, such as envelope signal generated by MATHS or a Gate applied to the STRIKE INput (see below). DAMP is continuously variable from long, slow and ringing to short, fast and muted.

The STRIKE INput, also unique to the Optomix, allows the artist to use a typical 8V Gate signal to trigger the Low Pass Gate circuit by plucking or striking the vactrol, thus allowing it to impart its magically slow response time upon the amplitude of the signal being processed. Combined with the DAMP parameter, STRIKE allows for the programming of percussive sounds (sharp Attack with voltage controlled decay) without the need for a voltage controlled envelope generator.

The benefit of direct coupling is that a channel of the Optomix could be used to process control signals. If you apply a fixed voltage at the input and strike the hannel you can use the output as a organic envelope!


Since 2016 the Optomix is available in Revision 2, which adds the ability to use the Optomix as an envelope generator or audio compressor.

  • envelope: just patch a gate into the Strike input and the OUT will emit the envelope CV.
  • compressor: Patch audio to SIGNAL IN. The DAMP IN acts as side chain input, CONTROL determines ratio. Nice for creating ducking effects.


per LPG: signal input, signal output, STRIKE input, CV inputs for DAMP and CONTROL.

one AUX input, one summing output


3U Eurorack module, 8HP wide, 29mm deep
Current draw: 25mA @+12V and 25mA @-12V

0.086 kg
Article Number
availability ? coming soon
€ 19% VAT excl. €189.08 € 19% VAT incl. €225.00
Excl. 19% VAT, Excl. shippingLieferzeit 1