Dual VCA

Type: Module

Category: Utility

Updated: Jun 30, 2021

Manufacturer: Adroit Synthesis

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This relatively simple module provides two Voltage Controlled Amplifiers, a CV inverter and a mixer configured with normalized connections to provide maximum functionality and convenience in a fairly compact space.

Depending on how you connect it and the setting of the INV (invert) toggle button it can serve as any of the following…

  • Two independent VCAs
  • A stereo VCA
  • A voltage controlled cross-fader
  • A voltage controlled panner
  • A voltage controlled two-channel mixer

The four sockets at the top are inputs, the three at the bottom are outputs.

Hopefully, it is fairly obvious from the schematic legend how things work.

If only one of the input sockets at the very top are connected then the horizontal line between them indicates that the other VCA will receive a copy of the signal.

The two sockets in the middle of the upper half of the module are the CV inputs. The top one will control the gain of both VCAs if the lower CV input socket is not connected to anything.

If the INV button is engaged then the CV for the right-hand VCA is inverted. In other words a CV of 5 volts will result in zero gain and a CV of 0 volts will result in maximum gain.

This module is also available as part of the Adroit Toolkit bundle https://store.cherryaudio.com/bundles/adroit-toolkit