Once a week or so, after I have used one full session of a Paraliminal I fall asleep with the sleep track on continuous. Unfortunately, I do not thing there is a playing device which allows a person to program the number of repeats. As advised through the Paraliminal booklets, as soon as I wake up, to turn the MP3 player off.
I agree that the night is meant to give rest to the brain, so I think playing the sleept track 2-3 times at most should be enough.
I agree that Alex has been a wonderful moderator over the years and provided great advise to everybody.