Using nothing more than a special case and an app, the AUUG Motion Synth is a project that uses an iPhone or iPod Touch to turn its owner's body into a musical instrument. The idea is a very simple and, for any Theremin virtuosos reading, normal way of making music simply by waving a hand or changing a position. However, unlike rocking the Theremin, which is all about moving hands to manipulate magnetic fields, the AUUG uses a handset's array of sensors to detect movement and to bend the pitch or sound to suit. And to make sure that musicians don't get carried away and end up launching their phones across the room while trying to perform a rather complex solo, the AUUG's case features a much-needed elasticated strap that slips over the hand.