LSDJ / Little Sound DJ
The basic idea is to transform a plain Game Boy/Game Boy Color into a full-fledged music workstation.
The Gameboy sound chip offers four channels with 4-bit sound. Custom waveforms can be created by free-hand drawing, or by using a subtractive synthesizer with resonant filters. For extra versatility, Little Sound Dj also contains a quite powerful arpeggiator, which possibilities go far beyond the classic C64-style chords.
The sequencer of Little Sound Dj has a very open structure. It was designed to leave all the musical possibilities of the Gameboy in the hands of the user. The system can be said to be both simple and complex; it has a slight learning curve, but when learned, it is possible to transcribe a complete Bach piece to it on less than one hour.
Sample-wise, Little Sound Dj boasts a set of 59 phonems for programmable speech. Besides that, it also features drum kits sampled from machines TR-606, TR-707, TR-727, TR-808, TR-909, CR-78, CR-8000, KR-55, DR-55, DR-110, DMX, Drumulator, RhythmAce, TOM and LinnDrum.
The Gameboy Camera has a hidden "DJ game" that is essentially two 16-step mono synths and a 16-step XOX noise drum machine. Its operation is comparable to ReBirth or TB-303's and a TR-808/909.
You can find the auction here.