Okay, I need to simulate the guitar effect at the beginning of Comfortably Numb. I figured I would use the Whammy effect in the Poly mode, but since I don't use the whammy effect any other time I do not want to dedicate an expression pedal to that effect. Is there any way that I could use a time based controller that would basically perform the function based on when I kick the effect on? I.e. I would play the chord, and then kick in the whammy effect and it would automatically do the pitch transpose (Whammy) at the rate established by the time based controller. Can anybody help me with this?