The Roland MC-303 Groove Box is a self-contained, retro-styled sequencer and integrated sound module with some very high-tech features. Techno, rap, jungle, hip-hop, acid and other dance styles can now be approached easily and creatively by dance music producers and other groove enthusiasts with little or no musical training. Just lay down some cool beats and fat bass lines from the MC-303's huge selection of sounds and rhythms and let there be groove!
See a shockwave demo of the MC-303 Groove Box
448 dedicated dance sounds, 40 synth basses (TB-303, etc.), 35 synth leads, 33 synth pads
12 rhythm kits, including TR-808, TR-909, techno, jungle and house sets
Built-in vintage synth sounds and arpeggios; preset and user dance patterns with 300 variations
16-part multitimbral with an 8-track sequencer containing multiple quantize functions: Grid, Shuffle and Groove
Resonant filter, LFO, envelope control and built-in effects: delay, reverb, flanger and chorus
Realtime Phrase Sequencer (RPS) for instant recall of musical phrases
Low Boost feature
hope this helps... i also have roland on speed dial if anyone needs that number!