LSDJ, Little Sound Disk Jockey, is a homebrewed cartridge for the Game Boy, programmed by Johan Kotlinski (known to the chiptune world as Role Model), that enables the user to sequence and program music on a Game Boy. The LSDJ is primarily used by chiptune artists, however it's also popular with many other musicians for writing songs featuring Game Boy sounds. The official cartridges were clear purple or blue and had the trademark LSDJ logo on the top-front. The sequencer of LSDJ has a very op… (More on Lsdj)