reseting counter with signals

Dear friends. I am trying to built a traditional delay which
transposes. I am using the delay tutorial plus gizmo, the only thing I
need now is to reset counter to 0 each time the actual sound comes in,
so that it always starts from the lower transposition and builds up.
FOr that I need to reset it, but I do not seem to find the connection
within the patcher that gives me the bang.
Cheers
Adina