I always wanted a "demo engine" whereby one feeds in the melody and chord name, and then a style(s). The AI would then use pattern matching to make a fuller sco

I always wanted a "demo engine" whereby one feeds in the melody and chord name, and then a style(s). The AI would then use pattern matching to make a fuller score in the chosen style(s). The output could be midi and/or an audio file (such as .WAV). Bonus points for vocals if given lyrics. I could make Elvis diet parodies: "Ain't nothing but a round dog..." Band-in-a-Box software sort of does this, but lacks realism in my opinion.