The problem is, copyright law wasn't written for machines. It was written for humans who create things.
In the case of songs (or books, paintings, etc), only humans and companies can legally own copyright, a machine can't. If an AI-powered tool generates a song, there’s no author in the legal sense, unless the person using the tool claims authorship by saying they operated the tool.
So we're stuck in a grey zone: the input is human, the output is AI generated, and the law doesn't know what to do with that.
For me the real debate is: Do we need new rules for non-human creation?