A playful an physical way of composing and modifying music patterns was shown by So Kanno from IAMAS Ubiquitous Interaction Research Group. Its main components are gear-wheels that can be stuck on a soundmaking playback device. Driven by a central motor and control device several of these gear-wheel items can be combined. Very simply one turn of the wheel represents one loop of its sound.
Absorbing is the idea of modifying the looptime by the number of cogs and with it the posibility of free exploring feasible combination of sounds and melodies. What was interesting is that changing sounds and regulating volume is realised over switches in a very ordinary way. (why not by using other gear metaphors?) What leads to the question if that is lack of consequence in design or if this is the best-known way of organising these functions? (thinking of other music projects like the reactable or block jam)