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Midwest Modular
Minneapolis, MN, United States
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About This Listing

Intoducing the WMD Triple Bipolar VCA! Featuring 3 bipolar VCAs, a MIX out, and more,this module provides dedicated inverting/polarizing/bipolar amplitude modulating inputs normaled to the Phase Modulation inputs on the PDO and can connect to it as an expander but is fully functional on it's own!

A bipolar VCA is like a normal VCA when operated with positive control voltage. But when using a negative control voltage, the output will swing back through zero amplitude and the output will be inverted. This produces deeper modulation than a normal VCA and can be used to great effect on VCOs and LFOs.

The Triple Bipolar VCA also has a special feature-dedicated inputs on each channel allow for replacing the inverted signal with a seperate input! When the VCA goes negative, rather than outputing the inverted +input it will alternate to the -input if patched, sort of like a crossfader only instead of the sum in the middle, it will be silence.

The Triple Bipolar VCA is also designed to be used as a standalone module, it does not require the PDO to operate.


  • Three Bipolar VCAs

  • Excellent for Bipolar modulation or AM synthesis

  • Essential expander for the PDO mkII

  • Linear Response VCAs

  • Bipolar Attenuators for CV control

  • Mix Output Sums All Three VCAs

  • Bi-color Signal LEDs

  • "-" Input for Mix Through Zero, converts a bipolar vca channel to a dual vca

  • Skiffable PCB Design


80 mA +12V
75 mA -12V
0 mA 5V
28 mm deep

Product Specs

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more

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