Don,
I have noticed in the past but have never posted anything that if you just leave the game running or you are playing and you don't happen to land on a action that has sound that the background songs will stop after about two or three songs have been played. Then as soon as you land on an action that involves playing a tune when you go back to the game the background songs start playing again.
I am not sure exactly how long it plays or how many because we are usually playing the game and not really paying attention to the music but when it stops you realize it isn't there.
Any ideas or maybe something I can change to get the music to continue?