I have been unsuccessful in finding a way of turning off the irritating themed background music that starts when my Windows 7 Home screensaver cuts in.
I've tried muting the System Sounds option on the Volume Mixer in the system tray. Didn't work.
I set the Sounds dialog of the Personalization window to 'No Sounds'. Didn't work.
Other than muting the Device speakers, which I don't really want to do, I can't seem to isolate the screensaver music for disabling. I'm happy with the Windows theme itself, it's just that infernal music.