About a week ago just as I went to lay down for bed I heard music. It wasn't music as in the kind that would be on a radio. It was more like native american drums and wind instruments. I got up to see if a tv was left on, or if my kids were up at 3am. No one was. It was quite beautiful music. I went to my window to see if it was wind, turned off my fan to see if it would stop. It didn't. I thought it was a fluke, and went to bed listening to the beautiful noise.

Does this happen to anyone else? It hasn't stopped. Every now and then since this happened I catch a little tune of it, and move on about my day.

I am mentally stable, not prone to the "voices", and my hearing is just fine. What could be causing this?