Computers can already generate convincing telephone calls and news articles. Yet people haven't stopped answering the phone or believing the news. /s
Actually, I have stopped answering the phone.
In my view there's already a sufficient quantity of perfect classical music, that for most people, they could listen endlessly, and it would always seem new to them. Especially if hearing some familiar material once in a while is part of the enjoyment.
Yet musicians and audiences got violently sick of perfect classical music, and started creating "bad" music, just for the experience of trying something new. And this has happened over and over in music and other art forms.
I won't say computers won't ever be able to do that, but it suggests a level of AI beyond simply curve fitting the existing sequences of notes in recorded or written tunes. At the same time, what music evolves into with the use of AI may open up new areas for exploration of new human music.
As a kid, I played music that my mom didn't recognize as music. Eventually the AI will be motivated to create music that humans don't like, but that the computers prefer. That will be the singularity. ;-)