[emadb]

I totally agree with you. Sometimes you love a song from the first listen, it bites you even if came from an artist that you don't know. My dream is a suggestion engine that "examine" the melody, the harmony, the frequencies that make the song and finds songs that are similar based on that parameters. Probably a signal analysis could help in finding why you like that songs.

[visarga]

But this article does exactly that: signal analysis with neural nets on song spectrograms. It just doesn't generate the kind of matches you want.