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.
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).
Dynamic percussion made easy
A typical application of Skis is to take two signals (noises, for example) and generate percussive sounds with adjustable DECAY from them with a TRIGGER signal.
Skis II is a complete makeover of the original Skis module. It has a more robust and cleaner VCA architecture, a new dynamic voltage controlled decay envelope, and a few more little tweaks.