This is the PCB and Panel to build the #1163 Mini Mixer, A module designed to mix 6 seperate inputs be it CV, Audio, Brainwaves whatever! into 1 output. Each channel has a level control and an on/off switch.
The info on this project is over here :-
It is in KOSMO format and does require self assembly and component sourcing, Please check the product page for more info.