Can this approach be used to generate "missing parts" in unfinished song? If composer has few good parts but is too lazy to finish the whole piece, for example? Or to "extend" Moonlight for example?
There are special approaches to generating music. The best for ratio of quality/complexity that I know of are Markov constraints https://www.youtube.com/watch?v=buXqNqBFd6E and WaveNet. I don't think WFC offers something useful and new for generation of music.
