User Manual

INSTRUCTIONS 
4 Independent VCAs 
The simplest way to use the Quad VCA is to ignore any of the cascading CV and mixing
functionality and just use it as four independent VCAs:
1. Connect the output signal from the source to IN 1 . The source can be anything, any oscillator,
LFO, envelope, or any other audio or CV generator.
2. Connect OUT 1 to the input of the destination.
3. Connect a modulating signal to CV 1 . The modulating signal can also be anything but is typically
the output of an envelope generator or LFO. Interesting effects can be had when using
audio-rate sources like oscillators.
4. Turn LEVEL 1 fully counterclockwise to remove any CV bias.
5. Adjust the CV input attenuator and Linear / Exponential Response control to taste.
You can repeat the above instructions for channels 2, 3, and 4 to get four totally separate VCAs.
Level Bias 
The LEVEL control of each channel can be used bias the channel’s response. In this way you can
set the “default” amount of signal passing through the VCA, and then adjust it using external CV.
One situation where this is useful is when controlling amounts of modulation. For example when the
output of one oscillator is being connected to the FM input of another the Quad VCA can be used to
vary the FM amount:
1. Connect the sine output of oscillator 1 (the modulator) to IN 1 of the Quad VCA.
2. Connect OUT 1 of the Quad VCA to the FM input of oscillator 2 (the carrier).
3. Use LEVEL 1 to set the FM amount (index).
4. Connect an envelope to CV 1 and adjust the attenuator. The envelope can now be used to vary
the FM index during each note played.
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Quad VCA Manual 8