Version 0.1 from November 2020
VCA that I built for my drum machine project. It’s very simple and actually passive by its original design. I just added some illumination, so it requires power supply.
The design is based on “1 transistor passive VCA-ish thingy” by shiftr via muffwiggler.com.
It doesn’t seem to be 100%ly mature: First I can hear a high tones leaking through and second, it’ll only work with positive voltages. But still enough for my requirements to synthesize a bass drum, a snare and a hi-hat 👍
Also see the comments on Instagram and Reddit.