That requires identifying the melody, which is certainly not something all humans can do, and was probably not generally doable by a machine in 1975. It also throws away a huge amount of information, and requires starting from the beginning of the melody.
Re:How does Shazam work? (2022)
by huhtenberg on Wednesday December 06, 2023 @05:51AM
(#38542365)
I'd guess that this won't work well for EDM (electronic dance music) tracks.
[1]: https://en.wikipedia.org/wiki/Parsons_code