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It analyses the text in the body of the supplied URL and follows an algorithm to render that site into a musical composition. It chooses a drum pattern, synth style and key based on the contents of the page, and plays back the associated music via the "Play this website" button.
After analyzing your URL, you have the option of sharing your results on Facebook and Twitter. The creators, UK-based ad agency DLKW, also report being busy working on an embeddable version of CodeOrgan as well.
Mashable is sounding downright jazzy, according to CodeOrgan. What do your favorite sites sound like?