Generating Music
At Playing the Market (via /.), music is generated based upon some physical phenomenon (e.g. the stock market) that need not result in classic musical styling, but rather, conform to the physical phenomenon. The goal is not to mimic, but to be artistic. Take a listen to Fibonacci's Random Walk (part 1) which is based on the Fibonacci sequence [ F(n) = F(n-1) + F(n-2) ] augmented with deterministically generated noise for an example of this approach. The result is eminently listenable, but other works on the album lack that quality.
Veering away from data inspired music, we look at music generated by the approach in Grammar Based Music Composition (see the example above). Jon McCormack transforms "string rewriting grammars based on L-Systems into a system for music composition" that seeks to aid in the composition of works. While not using the L-System approach, a sample of work generated from human speech offers a taste of his music.
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On the topic of computer generated music, you should check out David Cope's EMI - Experiments in Musical Intelligence. It got Doug Hofstadter worked up, who said "the day when music is finally and irrevocably reduced to syntactic pattern and pattern alone will be, to my old-fashioned way of looking at things, a very dark day indeed."
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