Yamaha Music Synthesizer MX BK/BU series features over 1000 Voices from the legendary Motif series plus deep computer and iOS integration in a compact, lightweight keyboard and a new blue color! That powerful sonic palette is packed into sleek packages (available in 49- and 61-note versions) that fit today's on-the-go life style. But the MX BK/BU Series aren't just synthesizers; they are designed to bridge the gap between hardware and software. By adding extensive audio and MIDI USB connectivity, advanced DAW and VST controller features and a suite of powerful music production software, the MX BK/BU integrate hardware reliability with controller flexibility to give you the best of both worlds at a ground breaking level of affordability. • Class Compliant USB Audio/MIDI for true "plug and play" connectivity without installing any drivers • Motif Sound Engine: layer, zone, switch, cycle, randomize and control up to 8 elements within a single voice • Virtual Circuit Modeling re-creates the sound and behavior of vintage effects and signal processors • 128 notes of polyphony ensures dropout-free performance playing live or with full 16-track sequences • Record/playback stereo audio and 16 channels of MIDI data via a single USB cable without any external devices