The Rack Extensions "Set Audio Out" allows you to route the signal from the In to the 8 Out. The program is selected with the “Switch Up Down Prg”, while the relative 8 Out is enabled with the “Switch Up Down Set”. When the “In Cv” (mode slave) is connected, the program change takes place through this connection, while the “Switch Up Down Prg” is disabled. The same signal as applied to the “Cv In” comes out of the “CV Thru”.