'ghetto' VCA

The module relies on the properties of a photo-transistor to generally dirty up any signal coming passing through it; think of it as kind-of like a low-pass gate with built in distortion and a few other properties too.

In the beginning there was the OptoThing - it was an interesting piece of kit in that it sometimes behaved a bit like a VCA, or maybe a filter, or maybe somewhere in between. It was a classic example (I think) of how something with a relatively low parts count could do weird and wacky things to your sound.

This is the OptoThing's little brother - same functionality, but only a single channel and it fits in half the space so you can fill that annoying gap in your case as well.

Use it as a 'ghetto' VCA with an envelope-type waveform or use swept voltages to create bizarre, filter-like effects. Whilst the opportunities aren't quite endless, there are still quite a few of 'em.

Panels are made from 1.6mm FR4 (PCB material)- also provided are suitable mounting screws (M3x6). There's no power cable as this is a fully passive module

https://www.yorkmodular.co.uk/collections/eurorack-modules/products/single-channel-passive-optocoupler-vca-filter-low-pass-gate-2hp-fr4-panel