Good idea ... I agree. Ideally you could record or export audio and/or midi (as a performance or a loop).
Brilliant and seriously useful music app! Thanks.
If you export the pattern to e.g. Thumbjam you can let it play in the background. But I´m sure you know this.
However, how can you exactly position the file of a solo without an exact zero?
Being able to playback your recorded loops (and adjust tempo) in DrumJam is the first item on the TODO list. You are correct about background playback in ThumbJam, there is no foolproof way to sync it up, since TJ doesn't support midi clock yet, the best you can do is trigger the start manually in DJ by ear.
Using MoDrum or Loopy in the background to playback the loop is another option, and they do support midi clock sync.