MIDI TRACK 1 -> OUTPUT MIDI TRACK 2 -> MONITOR AUTO
MIDI TRACK 2 -> OUTPUT MIDI TRACK 1 -> MONITOR ON
IF NOTE DETECTED = CRASH
This was accidental but it crashed 8.4.9b
I do not get a MIDI FEEDBACK LOOP DETECTED notification that would prevent me from making this arrangement.
We should get a NOTIFICATION if we want to proceed with MIDI FEEDBACK process

