This is how I did it, the "to voice module" is only there to keep the solo or 1 voice ST-gate at the same volume when switching from polyphonic mode. If a note is held down when switching the router it latches on and hangs. I can't think of any mod to this circuit that will stop or turn off the note in the STgate before the router switches to the normal gate. Tried sending in a zero event by inserting a multiplier on the gate out and switching it to 0 but the note stayed on. It would be nice if they had a kill switch on the gate but not on this one. Any ideas? A different method perhaps.