Optomix (black panel)

Dual LPG

A two channel Low Pass Gate with side-chain compression, providing simultaneous voltage control over amplitude and frequency content of a signal. It is in essence, a Voltage Controlled Filter Amplifier (VCFA) that has an extremely organic response to control signals. The Low Pass Gate is a classic West Coast synthesis circuit.

  • Damp circuit accepts audio as well as CV - allows for patching side-chain compression.
  • STRIKE INput allows use of Gate signal to trigger Low Pass Gate circuit, "plucking" or "striking" the vactrol
  • DAMP and STRIKE parameters combine to allow for percussive sounds (sharp Attack w/ Voltage Controlled Decay)
  • Normalization of a positive offset to the Channel inputs allows for level-shifting of CV, Envelope Generator and even subtle non-symmetrical clipping of signals
  • Summing stage with an AUXiliary IN allows for chaining of multiple units creating larger mixes
  • Direct coupled, process audio or control signals
  • Utilizes 4 vactrols (photoresistive opto-isolators)


  • 25 mA +12V
  • 25 mA -12V
  • ? mA 5V
  • 24 mm deep
  • Ø 4.00 (9 Votes) Average Rating

This Module is currently available.

$215 Price in € submitted Apr 30th 2015, 16:25 by qu0ne | last Change Mar 3rd 2019, 02:37 by h2g2guy

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