I found another thread that asked about looping PSFs indefinitely and the answer was something about modifying the the tags using a tool.

Is there a way to do that with all different file types? I've tried Googling but have found nothing definitive.

Right now AO will play a file through a couple times then fade it out and move on to the next one in the playlist, but I would like to get files to loop without stopping (SPCs as well as files for Genesis and other systems)