I think that's the joke. It literally takes the exact same song unaltered but it says it's "using machine learning", "fair use" etc. to give the pretense of it being legitimate.

This is most likely a commentary on GitHub co-pilot and how the authors of this joke think that GitHub co-pilot is violating copyright and does not fall under fair-use.

I just confirmed the "processed" file has the same SHA256 sum as the original.

EDIT: I incorrectly labelled at Google co-pilot instead of GitHub co-pilot. Fixed.