The AP-270's award-winning AiR Sound Source includes two beautiful new stereo grand piano tones which comes alive with realistic damper resonance, simulating the entire body of the instrument, not just the strings. The AP-270 also features a stunning New York grand piano Tone, with a wide dynamic range suitable for many genres. In addition to pianos, the AP-270 features a variety of 19 instrument Tones, with the ability to layer and split them as needed. With a generous 192 notes of polyphony, even the most complex performances will sound perfectly natural. The AP-270 connects via class-compliant USB to any PC, Mac, iOS, or Android device, with no drivers or installations needed. The free Chordana Play for Piano app, available for iOS and Android devices, gives you complete control over every function in your piano. It also displays PDF scores, lets you play downloadable MIDI songs using your piano's internal sounds and speaker system, and learn to play MIDI songs with an interactive scoring system. The free Chordana Play for Piano app, available for iOS and Android devices, gives you complete control over every function in your piano. It also displays PDF scores, lets you play downloadable MIDI songs using your piano's internal sounds and speaker system, and learn to play MIDI songs with an interactive scoring system. The free Chordana Play for Piano app, available for iOS and Android devices, gives you complete control over every function in your piano. It also displays PDF scores, lets you play downloadable MIDI songs using your piano's internal sounds and speaker system, and learn to play MIDI songs with an interactive scoring system.