The Xaoc Devices Praga II is a 20HP 4-channel voltage-controlled stereo mixer which can be added to a Eurorack modular synthesizer system. The Praga II includes a stereo mixing bus, dual auxiliary sends (with stereo returns), click-less muting, DC-coupling, a pristine signal path and dedicated unipolar and bipolar voltage control of volume. The advanced control circuit found in the Praga II combines the internal voltages generated by the panel potentiometers with external CV over volume and pan, minimising distortion whilst attenuating response and constraining VCA gain.