This is the ultimate in geek: The famous John Williams "Imperial March" from Star Wars... played on two floppy disk drives. It's been done before, but this is perhaps the best rendition I've ever heard. And for those who are curious, the sound comes from a magnetic head moved by a stepper motor. To make a specific sound, the head must be moved with appropriate frequency.
The sound is not a music file; it's created on the hardware itself. Brilliant!
UPDATE: Here's the original "Imperial March" composition for comparison.