A fascinating read on the magic behind Shazam
Launched in 2002—before apps were even a thing—Shazam felt like pure science fiction: dial a number, hold your phone to the speaker, and get a text naming the song.
Shazam’s core: transforming sound into spectrograms, then into constellation maps, then into compact audio hashes—each one matching frequency pairs and time deltas.
#SignalProcessing #AudioTech #MachineListening
https://towardsdatascience.com/the-five-second-fingerprint-inside-shazams-instant-song-id/
