The MST Unity Gain Mixer adds input signals together and combines them for a summed output. For example, if you put in a 1V source and a 3V source, the output will be 4V. It’s mainly used for CV, but it can also be used to combine audio signals together.


A unity gain mixer is handy in several ways:

  • Combining gates and triggers. Plug a few sequencer steps into the unity gain inputs, then run the output to a drum synth, VCA, envelope, etc.
  • Re-shaping two CV sources with a single envelope.
  • Combining different wave shapes or LFOs to make crazy sounds.
  • Controlling the CV of one source with the CV of another source. Just plug the CV out of a sequencer into and an expression pedal/touchable CV out into the unity gain inputs.



  • Two 5:1 Unity Gain Mixers
  • 5 inputs per channel
  • Mixes both AC signals (audio) and DC signals (gates, triggers, CV)
  • Channel A output normalled to first input of channel B
  • Input signals are not boosted or cut
  • Sum of inputs is the total output
  • Polarity protected



  • Current draw:
    • +12V: 9mA
    • -12V: 9mA
  • Module Depth: 22mm
  • Width: 6HP