I used this for a personal project [1] a couple of years ago to shorten audio files without making them sound like they were cut. This is done by removing repeated sections like replacing two choruses with one. I initially wanted this to "resize" background music to match video footage I had, but it is kind of fun to just mess around with songs too (like those content aware scale picture memes, but to create the shortest possible audio).
I think for my use case specifically, the library was kind of overkill though and something like librosa [2] would have been enough for feature extraction.