I'm having issues as well... with childcare and the MPE on a Prophet 6 desktop. :lol: The scaling is way off and it doesn't seem to be per note. In other words, if I slide my finger up a note on my right hand at the same time I'm holding down a chord with my left, I hear the entire chord also move up in pitch, like it was just regular pitch bend.
I also seem to be experiencing this both with pitchbend and Aftertouch/Pressure acting as global, instead of per channel/voice. I'm watching the midi data in MidiPipe, so i'm certain it's transmitting on Channels 2-7 appropriately. I also have the MIDI Channel set to MPE.
A simple test is to set the aftertouch to amp and make it fully negative. Aftertouch should then choke out notes, but it should be per note I believe. On mine with 1.6.3 it chokes all the notes with the last pressure used.
Similarly, if you change the global pitchbend it affects the amount of pitchbend applied from channels 2-7, but the voice pitchbend does not change anything that i can tell. You can hear all voice's pitch changing from pitchbend sent on channels 2-7.
CC74 seems to work appropriately, which you can test clearly by using a square oscillator and setting the destination to PW12/PWA. In that case a max y value will choke out the note (because of a max pulse width, which is silent). If you hold two separate notes, you'll see that you can choke them independently as intended.