ADDAC System ADDAC816 Percussion VCA

The module has been named "Percussion VCA" because most percussion instruments have sharp attacks with variable decays just as its AD Envelope. However, this can be used for any purpose where a VCA is needed including for CV signals due to its DC coupled signal path.

While deep in the Percussion VCA's soul there exists a standard VCA with exponential response that can be used as such, in its heart pulses an AD envelope with a sharp attack and a variable decay internally connected to the VCA control input.
  On the Percussion VCA, the AD envelope has a fixed short attack, just enough to avoid the typical “click” that happens when using a gate signal to control a VCA. Meanwhile, the envelope decay can be controlled via its knob or voltage-controlled using the CV input and attenuverter, lending an enormous degree of sonic versatility.
  Finally, the Percussion VCA can also be driven from a simple gate signal while controlling its decay, making it easy to plug a noise source, VCO, or any audio signal and turn that source into a percussive element.

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