Hey there,
- If you send an undo command it will undo the current recording, yes!
- Same thing with BB fills.
- Not just yet, because Aeros still does not have a CC that controls Start and Stop but this is coming in the 4.1.x MIDI expansion. Stay tuned! You would just need to send the CC commands specific to the units for start and stop.
You can find all Singular Sound commands here.