"Once a full palette of vocal fonts is available (or once Yamaha allows users to create their own), the possibilities become mind-boggling: a chorus of Billie Holiday, Louis Armstrong and Frank Sinatra; Marilyn Manson singing show tunes and Barbra Streisand covering Iron Maiden."
This is another story, however:
"Start with any number of existing programs that randomly generate music. Run those files through Hit Song Science, the software that has analyzed 3.5 million songs to determine mathematic patterns in hit music. (Major labels are already taking suggestions from it — "Slower tempo, please, and a little more melody at the bridge.")"