Doesn't he just use that pad as a MIDI controller for a Digitech Whammy pedal?
I'm sure I remember reading somewhere that the pad on his guitar is somehow wired so that when he drags his finger across the pad in a certain direction, it's like he's moving the treadle pedal on a Whammy pedal up and down (moving the pitch up and down).
I could be wrong on this, but this is what I recall :lol: