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HeliphonThe goal of Ensemble Robot is to bring together the "often-independent" artist and engineer communities to make a new generation of music.
One of their creations is the Heliphon, a double-helix shaped robotic metallophone, built in 2004 by Leila Hasan, Alexandra Andriessen and Giles Hall. It uses solenoids to hammer metal keys, and each key lights up as it plays. Here's a photo gallery from the group's Jan. 25 concert at the Boston Museum of Science.
The Blobot is a dancing and pipe-playing robotic tetrahedron made of air cylinders, designed and built by Andy Cavatorta in 2005-'06.