Found this also:
The Gemora in Gittin says you cannot go to sleep or wake up to music, and the Halachah is so. However, what we do nowadays by using a CD player for an alarm clock or a way to put us to sleep by distracting our minds off tomorrow’s global final, is not the type of going to sleep or waking up to music that the Gemora is talking about. So if your music has any therapeutic (for lack of a better term) or utility (such as an alarm clock) value to you, you can do it.
hopefully someone with some actual knowledge will post here.