Volume and modulation shifts can spell the difference between a ho-hum musical passage and an emotive one. The FCV100 gives you two mono or one stereo instrument inputs. In Norm mode, you can control the volume of two individual instruments. In CV mode, you control volume and modulation levels, and input/output 1 can still be used for controlling the volume of another instrument! Take control of musical nuances with the Behringer Foot Controller FCV100.