Just spotted this:
“Tristan Perich’s 1-Bit Symphony is an electronic composition in five movements on a single microchip. Though housed in a CD jewel case, 1-Bit Symphony is not a recording in the traditional sense; it literally “performs” its music live when turned on. A complete electronic circuitâ€”programmed by the artist and assembled by handâ€”plays the music through a headphone jack mounted into the case itself. The project is set to be released on Cantaloupe on August 24, 2010.”
Wow, great idea, beautiful execution.