You can, however, record a snippet of your own playing, open it in the audio edit window and precisely trim it to an even number of measures, then copy and paste it multiple times back to back for a no-flubs rhythm section. Not as flexible as a Real Track, but useful in cases where the background instruments are highly repetitive

Peter could probably tell us how to make REAL TRACKS, but then he'd have to kill us. Given that constraint, I'm kind of hoping he never tells.

;-)