Overheard projectors were never the most glamorous educational technology—that first Smart Board was some Star Trek-type shit!—but they could be found in pretty much every classroom growing up. I wish they all would've played music like this one.
Blair Neal from New York said, "Oh yeah, Dirty Projectors? I see you and raise you five units of LITERAL," putting together this awesome hack that uses a camera and a laptop to convert a humdrum overhead projector into a neat music-making machine.
Notes are made by making dry erase marks on a regular old transparency, with different colors covering different octaves and a blue Expo triggering 808 drum samples. Let's see your Smart Board do that! [Make]