Akai Professional MPC 5000 Music Production Center 64-voice drum/phrase sampler with 64MB memory built-in. Expandable up to 192MB RAM Three-oscillator virtual analog synth engine with built-in arpeggiator Over 300 Virtual Analog synth presets included Over 40 all new effects available within a modular 4-bus effects processor Built-in hard disk drive with an optional CD-R/DVD drive available