But it is great if you find the right midi file which <a href="http://www.kunstderfuge.com">http://www.kunstderfuge.com</a> does often supply if you want to play classical pieces. because it has two tracks for left and right hand, also many of their midi files are live performances which then means that if you have something like e.g. Akoustik Piano you can hear how the piece is played properly or get a slight idea of the interpretation.