Semi-Modular Sound Generator + Effects Unit

Quad Creek is a semi-modular analog sound generator and effects unit featuring four voltage-controlled band-pass filters and a variety of CV circuitry. The multi-purpose nature of the band passes allows for a variety of functions, including melodic drones, plucky percussion, wah-like audio effects, and more. Combined with a white noise module and dedicated CV circuitry, you can craft complex polyrhythmic percussive and melodic structures

The Quad Creek also features a 5 channel mixer, three stereo audio outputs, and two stereo audio inputs.

It is available as a full unit, DIY kit, and PCB. Quad Creek is free hardware, with gerbers and schematics available under the GNU GPLv3.

https://loess-labs.net/inst/creek/#man