Bastl Instruments Clutch is an attenuator module for modular synthesizers in Eurorack format. However, the simply constructed quadruple attenuator has the special feature that it can be operated with the foot. The individual channels can be connected via a stereo cable to a volume or expression pedal, which then serves as a voltage source. The output of the pedal is a CV output.
Bastl Instruments Clutch Volume Pedal to CV Interface