I really don't think music is going to affect how pretty a game looks, but if you're sure.
Actually good music changes your whole mind about what you see and what you don't. It's an essential part, if not the most essential part of 3D graphics. I could just do a black screen with music playing, and people would start to imagine 3D graphics if they assume they can move around in the darkness. Have you ever read a book? You can sure vision the things what the book describes.