The Commodordion

Swedish musician and programmer Linus Åkesson built a musical instrument he calls the Commodordion. With a name like that, you might think it's an accordion built out of a commode, but no. It's built out of a Commodore 64! Two of them, in fact.  

In the first five minutes, Åkesson explains what it is and plays some music for us, if that's all you want to watch. Then we have a montage of the bellows-building process, then he explains how he wired up and programmed the electronics. If that's not enough, you can read about the project in detail at his blog. (via Metafilter)