Dot matrix printer music

 Images Printer Buttons2Paul Slocum converts 19850 Epson dot matrix printers into musical instruments by reprogramming the firmware so that the mechanical noises are emitted in specific sequences. The click-and-whirr rhythms are reminiscent of minimal glitch music or industrial. You might call it mechatronica.
Link (via MAKE: Blog, where other similar projects are mentioned in the comments)