This is a virtual Orff instrument that can be used in the classroom with a projector to show students how to play songs on their Orff xylophones / metallophones. This app can also be used to put together an Orff ensemble using iPads. As with the real Orff xylophones, you can remove keys as necessary to set up specific modes and scales. Additionally, you can transpose the instrument to any key and you can also record your performance to later play it back for you teacher.