This is a double CV-source, from 0 to 10 V, controlled by stereo fader. This controller makes possible to perform sweeps, which widely used in modern electronic music. The effect is similar to “wobble” or scratching. CV1 and CV2 generates 0 volts in middle position of the fader, 10 volts at the top and bottom position. DEPTH1 and DEPTH2 controls depth of CV1 CV2.