From Tristan Perich (the author) website:

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 circuit—programmed by the artist and assembled by hand—plays the music through a headphone jack mounted into the case itself.

1-Bit Symphony

Official website here. Author’s website here.