Once more a request of help about this topic.
I have:
PX5s linked with MIDI expander
zone 1 MIDI channel 1 to play Piano
zone 2 MIDI channel 2 to play Organ
using the same slider I want select zone 1 or zone 2
to play or Piano or Organ.
How to do it?
I found a stage setting (midi-4-channel-master)that explain how to switch on\off a zone with a slider but I need to switch 2 zones in the same time with a unique slider