This all seems like a great deal of overkill.
Some years ago, Korg produced a keyboard synthesizer with what was known as the KARMA system. As I remember it, the idea behind this was that you'd play some or all of a song on the keyboard, and the KARMA system would either take it from there and continue playing or function as a "backing" band while you continued to play.
I also think it's worth mentioning the Fake Music Generator web site: https://www.fakemusicgenerator.com/ . It bases on something known as cgMusic and produces interesting if rather repetitive songs.