Roland GA-FC Foot Controller for GA-112 and GA-212 Switch instantly between four channels and two routes of loops, reverbs, boost settings, etc. Simultaneously connect two expression pedals* for realtime control of volume and drive Simultaneously control stacked amps via Link In/Out port *EV-5, FV-500L, and FV-500H are available as optional expression pedals for the GA-FC. If you want to keep your hands on your axe at all times, the GA-FC foot controller lets you drive the GA-212 or GA-112 from the floor