“Suno’s training data includes essentially all music files of reasonable quality that are accessible on the open internet.”
“Rather than trying to argue that Suno was not trained on copyrighted songs, the company is instead making a Fair Use argument to say that the law should allow for AI training on copyrighted works without permission or compensation.”
Archived (also bypass paywall): https://archive.ph/ivTGs
That’s covered by section 107 of the US copyright law, and is actually fine and protected as free use in most cases. As long as the work isn’t a direct copy and instead changes the result to be something different.
All parody type music is protected in this way, whether it’s new lyrics to a song, or even something less “creative” like performing the lyrics of song A to the melody and style of song B.