Simple Six Channel Signal Mixer

ABC is a simple 6 channel signal mixer. It has 6 inputs - A, B, C, D, E, and F - and two outputs - A+B+C - which is mixed into the D+E+F output if nothing is inserted in the A+B+C jack. ABC is designed to mix audio signals but can be modified to mix CV signals instead. There are 6 solder jumpers on the backside, which can be connected to turn the ABC mix into a CV mixer.

Simple yet versatile:
ABC mixes mono, stereo, or CV signals

There are also 3 jumpers on the backside which can be used to normalize inputs A to D, B to E, and C to F. This is useful if you would like to use the ABC mix as a 3 channel stereo mixer (using both outputs and having separate volume control for left and right channel).