Been looking for syncing availability on the PX5S for quiet a while now. Oscillator sync, LFO sync you name it some sync of any at least. Any trick would help to make a sync with lfo or osc for following another osc , lfo  or Fx type on clock tempo etc.   So far I can only make an unspecified sync with the arpeggio from the pedal. I've been looking with doing it with applying external clock from midi to a specific channel. And or NRPN, RPN would provide some me