The music generated at the site Listen to Wikipedia may sound random at first, but what you're hearing is real data.
Using the data provided by Wikipedia's recent changes feed, bells are used to convey additions, while string noises represent subtractions from articles. Higher pitched noises are for smaller edits, while larger edits are translated into lower pitched tones. Deep swells of sound accompany new users joining the service. All of the various noises work together in surprising harmony, creating a zen-like mood to go along with the furious edits being made to Wikipedia's database.
At the same time, you can see what's happening onscreen. It may be soothing music, but you might also be sucked into the thrill of watching the encyclopedia of the internet being built in real time.
Link to story. Link to website. -via mental_floss