I've found probably the most egregious example of what knaik94's comment is talking about: https://maroofy.com/songs/214977681 ("Being Alive" from Company)

All the AI model seems to understand is the opening 5 seconds piano. Listen to the actual song it just opens like that because it's from a play.

I think this will struggle with any song that has build up, it's very promising, though you need a sample of entire songs not the sample Itunes gives you.