The QCVG (Quad Control Voltage Generator) is a hardware and software package designed, built, and developed by Reuben Son for implementing computerized control of an analogue modular synthesizer. On the hardware side, the QCVG is comprised of an Arduino Nano microcontroller interfaced to a pair of dual-DAC chips, which provide four channels of 0-4V CV (control voltage), and four trigger outputs (for triggering envelope generators in the synthesizer). Each CV output may be patched into an oscillator to control its pitch, and the trigger outputs are to be patched into envelope generators to control the articulation of notes through a voltage-controlled amplifier (VCA). The C++ library for the QCVG is still under development and a small production run of the hardware may be produced in the future.

The following demo was recorded in a single unedited take using the sample sketch provided on GitHub.

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