Quad

4-channel crossfader, scanner. 4-channel VCA. Waveshaper and Additive Synth Generator

Quad is a fully analog four channel crossfader, scanner and four channel
VCA. At audio rates it works as a waveshaper, while combining audio rate
signals and control voltage signals creates additive synth tones. With DC
coupled inputs, it is capable of crossfading between control voltages. All of
the functions work in stereo or mono for unique crossfading effects and
complex stereo cross modulations.

4-channel crossfader / scanner

4 channel VCA

100% analog, audio rate wave shaping

Additive synth generator

Stereo or mono outputs

DC coupled inputs

Mixer, panner

Voltage controlled channel selector

Basic voltage controlled mixer

Controls for amount of cross fade (spread)

Control for how long each channel stays on (depth)

http://www.blindmonkmodular.com/quad.html