If you're in California before August 31, you might want to visit the Ojai Valley Museum, to see the Conloninpurple, 60 aluminium trumpets with midi-controlled solenoids whacking wooden blocks at the end of each. MT reader and supergeek Albert Behar helped set the thing up and recorded this mp3 of the thing in action. If you don't know Trimpin, then don't let his pretentious mono-name put you off. He an artist/musician who has invented many cool things, including "a gamelan whose iron bells are suspended in air by electronic magnets; a photo sensor prevents them from rising past a certain point, and since they don't touch anything, once rung they will sound with a phenomenally long decay."