Milton Babbitt - Ensembles for Synthesizer (1964)

I just learned that Milton Byron Babbitt passed away last Saturday, January 29, 2011 at the age of 94. This is one of my favorite pieces of electronic music. This work actually took two years to complete; he had started developing it in 1962, and it was finally realized at the Columbia University Electronic Music Center in 1964.
In this video, I included some biographical information concerning Babbitt and this piece.