PX-5S: Sending Program Changes to External Gear
How to do program changes on an external device.
It is the Stage Setting that determines the zone assignments as well as knob/slider functions. So press the EDIT button and choose Stage Settings. You’ll see a screen that looks like this:
Select Zone Edit.
Then on the next screen choose MIDI edit.
Scroll down and you’ll find many things.
On page two you’ll find a screen that lets you turn off the internal tone generator and choose if you’re controlling an external device over MIDI or USB MIDI
Scroll down further and you find the setup for Program Change for this zone.