David Cope has written a computer program that can analyze composers’ music and compose new music that sounds like them. “Some classical music geeks enjoy listening for a composer’s signature tendencies and picking out the flaws in Emmy’s fakes. Others see the algorithms as an insult to the composer and the music. Once, at a conference in Germany where Cope presented some virtual Bach, a professor seated beside him bellowed his disapproval, declared music dead, and jabbed an accusatory finger in Cope’s face.”