However, in my experience no system ever managed to find genuinely similar songs, in terms of style, feeling, structure (notes, rhythm etc.), voice (pitch, strength ratio when compared to the accompanying instrumentation, ), and genre. One could find some of these, but very far from enough to satisfy my need. I appreciate though that some songs are so unique in this sense that finding similar ones will be a serious effort.
Let's take, for example, Evidence by Faith No More: https://maroofy.com/songs/1271787478
The suggested songs appear to share a similar structure sometimes, a similar genre and even a feeling at times. But none are coming within the range of the cue song.
What I'm looking for is a combination of multiple details that make this song unique: bassline, rhythm, feeling and voice.
Still, it must be said that in some cases, where the song follows a popular or fairly strict rhythm, like in some blues styles, the algo works a lot better:
For example, Heather Nova - That's All That I Need: https://maroofy.com/songs/275983279
Many of the suggestions fit the rhythm and, since the feeling of these songs is heavily based on the rhythm, we have multiple winners.