I work with a lot of external synths via MIDI, and I quite often get stuck notes on them (Studio One's MIDI handling is still on the rough side to be perfectly honest with you).
I know of the "All notes off" button in the MIDI monitor window, but AFAIK, all it does is sending "notes off" messages for any "note on" it had previously sent. But that doesn't seem to work really: all of external synths with stuck notes don't react to it, and notes remain sounding. I'm forced to go to all of the External Devices windows and manually send a MIDI CC#123 (standard for all notes off, a.k.a MIDI Panic) one synth at a time. Since stuck notes tend to happen several times an hour on synth-heavy songs, this is a bit of a time killer.
Could you not improve the "All notes off" button in the MIDI monitor so it also sends MIDI CC#123 to all external devices? It'll mean the world to me.
