The first fully-automated performance of the 1924 Futurist/Dadaist/Cubist composition “Ballet mécanique” by George Antheil takes place this weekend in the East Wing of the National Gallery of Art, on the Mall in Washington, DC–in conjunction with the larges exhibit in history on Dadaist art. Programmed by composer/author/music technologist Paul Lehrman, and using robots built by…