MST Expressor PCB/Panel
MST Expressor PCB/Panel

MST Expressor PCB/Panel

Your Price:$27.99
In Stock
Part Number:PCB-M-MST-EXP

Please note: this product only includes the PCB and Panel.  You will need to source your own parts.  Please see the Bill of Materials to find out which parts you will need.

The MST Expressor allows you to use expression pedals with your modular, taking a “hands-off” approach to expand your control and creativity. It has two identical powered expression pedal processing units in one handy module, allowing you to do things such as:

  • Control volume with your foot
  • Attenuate CV or audio if no expression pedal is plugged in
  • Add positive or negative voltage with the flick of an ankle:
    • Sweep a filter cutoff
    • Transpose CV
    • Pitch bend
    • Direct audio volume control
    • Attenuate and expand external CV
    • LFO rate adjustment
    • Modulation amount control
    • And more…


  • Processes audio and DC signals
  • Two discreet expression pedal input channels (1/4" TRS jacks)
  • External signal (audio or CV) input per channel
  • Precise output adjustment: attenuator/scale control per channel
  • 3-position switch select of +5V, -5V or 0V (mute) per channel
  • External input bypasses the switch voltage (the switch voltage and external input are not active at the same time, i.e. the voltage will not offset your input signal.)
  • Red/green LED per channel (red = positive voltage, green = negative voltage)
  • Compatible with passive TRS 1/4" expression pedals, such as the M-Audio EX-P


  • Current draw: 28mA on +12V; 28mA on -12V
  • Width: 8HP
  • Module depth: 24mm

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