Simple. Train a deep neural network to be a critical listener that can evaluate music for uniqueness and creativity. Train it with hundreds of sessions with music critics, until its output matches theirs almost exactly. (You will never get to 100% of course, just as two music critics will never agree 100%.)But the Beatles put their own Unique Beatles Sound into the earlier styles. How would you program in a "Unique Sound" into the Program.
Then train a second deep network to create music, using the first network to provide training feedback. Seed the second network with initial random weights. Then let it go and run millions of trials. Eventually the second network will create music that human critics will judge to be unique and creative.
Nope. No one would have programmed this.And if the Programmers did put a Unique Sound into their Programs, who is it that Created the Unique Sound? Of course it was the Programmers and not the Computer itself.