Symphonium offer 3 modes : listen, practice and play.Listen doesn't require a MIDI keyboard and show the note played in a MIDI recording.Practice will wait for you to play on a MIDI device the note displayed before going on.Play will show the notes to play and play the complementary hand if you are currently learning a single hand.For all those modes, it's possible to set a desired speed, to select the hands to play and to restrict to specific parts of the song.