Korg Pa800 61-Key Professional Arranger with Speakers RX (Real experience) technology includes Defined Nuance Control and EDS Synthesis for great sound Style engine follows your voice-leading, chording and timing for instant, on-the-fly arrangements XDS Dual Song Player with crossfade; Multi-track, Backing, and Step sequencing; Pad Sequencing 950+ Sounds; 64 Drum kits; 400+ Styles; 4 Stereo Multi-effects; 320 Performances, SongBook database Color Touch View display - easy/expert modes, contextual help screens; robust internal sound system