By “backing track” do you simply want the Aeros to import a track and play it once? Or do you want that plus the ability to play loops over that?
You can do the former today if you record it in real time. There is no way to import via sd card or otherwise. If you press Stop with EOL setting anytime while playing, then the backing track will play once and stop.
The latter is not what I’d call a common or fundamental looper feature. It seems like this is a few more features beyond the just shipped “lock tracks” feature:
- Ability to load in the track via sd card
- Backing track is essentially a locked track that doesn’t restart when changing parts
- Adjust display so that backing track location is displayed properly
- Record length logic to ignore length of baking track (loops are not multiple/fractions of backing track)
- Optionally end song when backing track ends