This is a modules based on a famous mixer. As feedback modules tells us: Sound design channel strip based on a famous late eighties small mixer used mostly for the well known TB303 distortion sound. Well indeed it does. It can overdrive your sound but still makes it sound awesome. I believe this was the one where you need to match you transistors.
Difficulty to build: Medium. Has a great build manual. Has multiple pcb’s, need transistor matching