How Shazam works
Slate’s Farhad Manjoo explains how Shazam works. If you’ve never seen Shazam, check it out, you’ll be amazed. Its incarnation as an iPhone app is its most famous — I had no idea it started out as a dial-in service. Shazam fingerprints songs and then compares the fingerprints of submitted samples to their database. The service fingerprints “important” notes in a song, not sequences of notes. I wonder how long note sequences would need to be to constitute a unique fingerprint? It’s probably less than you think.
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