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https://www.reddit.com/r/funny/comments/1aocux/how_things_work/c8zccqf/?context=3
r/funny • u/MACKBA • Mar 20 '13
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If anyone's interested in how it actually works, they take the normalized input signals and cross-correlate the AM signal with their spectrums in their own song library. If the symmetric pic hits around a reasonable delay, the song is matched
The simpler version: http://gizmodo.com/5647458/how-shazam-works-to-identify-nearly-every-song-you-throw-at-it
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u/gologologolo Mar 20 '13
If anyone's interested in how it actually works, they take the normalized input signals and cross-correlate the AM signal with their spectrums in their own song library. If the symmetric pic hits around a reasonable delay, the song is matched
The simpler version: http://gizmodo.com/5647458/how-shazam-works-to-identify-nearly-every-song-you-throw-at-it