So Dispatcher working on Ch2-7 would send the first note received to ch2,
the 2nd to ch3 and so on.
It then handles the note_off messages sensibly.
Note, however, that this applies only to the notes. I can’t see off hand how one would keep the aftertouch “attached” to a particular note as it were…
(indeed, see this from the designer)
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never gone looking for documentation on Dispatcher; it was a pipe where I could see how it worked, but only much later saw the point of using it!