1ON1 Piano sends piano-to-piano data between users in an upgraded, high resolution MIDI format. Combining this data with a piano, the exact finger movements of the sending piano are precisely replicated by the receiving piano. MIDI data describes the mechanical movement of your fingers (what note you play, how hard you play it, and how long you play it). In 1ON1 Piano, your instrument reproduces the sound using this high resolution MIDI data, the sound quality is extremely high.