Chomul

A switching, or chopper, multiplier for the modular, after Harald Bode's paper on multiplier-type ring modulators, which held such multipliers fit only to drive AC motors. Two on one panel: the upper one's inputs, swapped, feed the lower one's, and both outputs feed the inputs of a 'passive aggressive XOR'. One input (SW) usually takes a pulse, the other (MOD) anything; they shape CVs and envelopes well, with gaps and steps where the diodes' and FETs' on-voltage shows.

Key features

• Multipliers 1 and 2: SW and MOD in, OUT, each output with its LED
• Passive aggressive XOR: two IN, OUT
• 4 HP; Nonlinearcircuits publishes no current draw, depth or assembled price (it sells the DIY PCB and panel), and ModularGrid lists none