Edit: nevermind. The music works if I run the game as admin. Go figure.
It's surprising how many people seem not to know that in Win7 you should run run *every single program you run* in Admin mode...;) It's part of the basic security of Win7. Some programs will run OK with reduced privileges, some will only seem to run OK and then crash later, and some won't run at all unless they are run in Admin mode.
Easiest way to do it is to right-click on the executable of every program you have, open the "compatibility tab" and at the bottom *check* the box that says "Run as Administrator" (or something like that), and then click "OK" to save the change. From then on, just double-clicking the file will run the program in Admin mode automatically.
If you don't want to do that, then right-click every program icon you are about to run and select "Run as Admin" to actually run the program in admin mode.
It's really *spooky* how many people don't know this simple yet very, very important fact about Win7. But that's why I wrote this post! Happy gaming!