Check the listing for details. MX-61 Production Synthesizer Black. Condition: Open box. Listed at 815.78 USD. For keyboardists needing great sounds, computer connectivity and integration along with full-sized keys in an ultra-portable package, the MX61BK is a lightweight synthesizer featuring the legendary MOTIF sound engine and computer integration. Unlike dedicated keyboard controllers with no internal sounds or hardware synths that require a separate audio interface, MX61BK features a powerful synthesizer engine, deep computer DAW and iOS APP control and an integrated, class-compliant USB Audio/MIDI interface.A Complete Suite of Music Production Software IncludedThe MX BK/BU series is the only hardware synth in its price range to come with a complete suite of music production software tools. The included Steinberg Cubase AI features 48 audio tracks and 64 MIDI tracks, notation, built-in VST.