Available as an assembled Module and as a DIY project.
This Module is currently available.
World first Class-D VCA (silver panel)
cDVCA or class-D VCA is a new kind of VCA based on an entirely novel concept that is inspired from class-D amplification technology.
Concept: The input signal is turned into an ultrasonic PWM signal. The PWM is scaled to the desired amplitude and then filtered back down to the original signal.
The twist: The PWM frequency can be lowered down into the audio spectrum and the frequency can be controlled via its 1V/oct input allowing for crazy waveshaping that tracks your melodies.
The first VCA that tracks 1V/oct
The drive controls an innovative clipping method that does not rely on overdriving any circuitry and therefore results in distortions with a very defined character.
The signal then goes into a 1 pole VCF/tone circuit that allows to keep things under some amount of control as the harmonics produced by this module can be aggressive.
With no input, the module generates a simple square wave and therefore can be used a simple synth voice (VCO->VCA-VCF)
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These merchants probably sell this module. Huh?