I was just making a MIDI panic-button abstraction, and realized:
If Pd has multiple MIDI output ports open, how does [noteout] address the other ports?
This does not appear to be covered in midi-help.pd, and there is no reference to MIDI anywhere in the HTML manual.
I would guess channels 1-16 are device 1, 17-32 are device 2 etc. But why should one have to guess?