Input expansion for the PDO & standalone VCA
Intoducing the WMD Triple Bipolar VCA, the input side expansion for our Phase Displacement Oscillator. This module provides dedicated inverting/polarizing/bipolar amplitude modulating inputs normaled to the Phase Modulation inputs on the PDO.
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.
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
Normaling to PDO
Bipolar Attenuator for CV
Mix Output Sums All Three VCAs
Bi-color Signal LEDs
"-" Input for Mix Through Zero
Skiffable PCB Design
Controls and I/O
+ In - This is the normal input for each VCA channel. It drives the inverting side of the Bipolar VCA. These inputs are normaled from outputs on the PDO.
CV - This input jack drives the CV knob. It can handle unipolar or bipolar signals.
Out - This is the output of each VCA channel. They are normaled to the Phase Modulation inputs on the PDO.
Bias Knob - Sets the manual gain for the VCA. Centered will have a zero output (with 0V control voltage).
CV Knob - This knob is a bipolar attenuator for the signal applied to the CV jack. Spin clockwise from center for positive CV interactions, counterclockwise to invert the CV.
Mix Out - This output jack mixes the signals from each VCA.
This Module is currently available.$229 Price in € submitted Aug 26th, 22:54 by WMD | last Change Sep 1st, 20:26 by WMD
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