There are a lot of hardware music projects out there: Big Ideas (Don’t get any) (the Radiohead Nude remix), Playing the Building, Absolut Machines, Harddisko, …
So here’s a floppy drive playing the Emperors March.
found at nerdcore
An other one is the ‘BeggingBot’ by Alexander Gurko, it plays music just by floppy and hard drive mechanics. A 3,75 and 2,5 inch floppy drive and a very old hard disk represent different instruments playing a nice tune by just moving their heads and motors. When the tune is finished the CD drive opens asking for money. Just pay some cents and the bot plays again.
found at Aram Bartholl’s Blog