Hi there..
I'm new on these forums, but figured I'd post a few of my projects aswell.. (even though these aren't the most complex of projects compared to what I see a lot of others do in here)..
This is my Arduino UNO R3 playing "I am a Viking" by Yngwie Malmsteen.
In simple terms this is just a program uploaded to the arduino that converts midi-sounds into stepper-motor-frequencies. A software on the computer-side playing the midi-files . And some wiering..
I used 8x floppy-drives in this project.. Started out with two, but found that I was missing a lot of channels when only having those..
http://youtu.be/dnCiJrnM_fg?hd=1