His first breakthrough came when he began to rethink how human beings compose. His software had been starting its work from scratch, but it occurred to Cope that human composers draw on a huge amount of data when they sit down to write a piece of music. "We don't start with a blank slate," he said. "In fact, what we do in our brains is take all the music we've heard in our life, segregate out what we don't like, and try to replicate [the music we like] while making it our own." What separates great composers from the rest of us, he says, is the ability to accurately compile that database, remember it, and manipulate it into new patterns.
... In other words, great melodies (to our Western ears) are products of evolution, not creationism.
Interesting stuff. The music's not bad.