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I just want to say, it's remarkable how intuitive this is, and just how well it matches our own recognition process.

It's more-or-less identifying melody fragments*, and then just trying to match those up in a sequence. The same way we'll recognize something after 5 or 7 or 10 notes.

I'm pretty sure I've read about other methods for song fingerprinting that rely on things like loudness peaks, where it might work equally well, but that doesn't match how our own brains do it at all. It's pretty cool that this isn't relying on "artifacts" but basically works the same way we do.

* Technically not always melody, but probably is most of the time




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