There could be a "CELL" in the track deck where you could simply drag an existing loop into while you are playing live.... it would have it's own Key and Volume control... or if the Blue Lock is selected will be locked to the default track.
The feature above could be done with a single button or mouse drag... Then if you want to load another track in the deck.. the above loop will continue to play and you could adjust the key to match the new track.
It would free up a deck...where you have a loop going... plus it's a good way to loop a track on itself...
