The PX-870’s award-winning AiR Sound Source includes a new four-layer stereo grand piano which comes alive with realistic damper resonance, simulating the entire body of the instrument, not just the strings. The piano also includes key action sounds, key off simulation, adjustable hammer response, and a lid simulator with four positions. The PX-870 also includes string resonance, which exposes the sympathetic harmonic relationships between vibrating strings. Along with adding to the subtle beauty of the sound, this adds authenticity when playing works by Debussy, Ravel, and other composers who wrote with string resonance in mind. The PX-870 features a variety of 19 instrument Tones, with the ability to layer and split them as needed. With a generous 256 notes of polyphony, you can rest assured that even the most complex performances will sound perfectly natural. The PX-870’s innovative new Sound Projection system fills the room with rich, detailed sound. This powerful 40-watt, 4-speaker system is designed to envelop the listener and audience with sound emanating from various places on the instrument, just as it would on a traditional grand piano. The Volume Sync EQ ensures that you hear a balanced, clear sound across the entire frequency range, at any listening volume. 60 songs are included in the built-in Music Library, with room for ten additional songs of your choice. You can also record your performances using the PX-870’s two-track MIDI recorder. Concert Play allows you to play along with ten recordings of well-known orchestral pieces, with the ability to either listen to the piano part or silence it so you can play it yourself. To facilitate practice, you can even slow down these recordings without affecting their pitch. Designed to complement any décor, the PX-870 is available in either a black or white finish. Its compact, elegant cabinet with sliding key cover adds to the beauty of any room. The easy controls are located to the left of the keys, allowing you to play without distraction. The PX-870 connects via class-compliant USB to any PC, Mac, iOS, or Android device, with no drivers or installations needed.