CGS29 Wave Multipliers

The CGS 29 Wave Multipliers module is really 2 modules: a "grinder" and a Wave Folder. Both work in a manner that is sort of opposite to a filter; they add harmonics to an input waveform. The "grinder" has only static controls, whereas the Wave Folder takes 2 control voltages for dynamically changing the harmonic content. The Wave Folder also has a Pulse output with Pulse Width Modulation. If I had to pick one module as my favorite, this would be it.