Hearken the "hauntingly beautiful" music of Gheorghe Zamfir, master of the panflute, viral once again in 2018 due to the retro 90s' charms of his cable TV ads. It strikes me that Zamfir's extraordinarily formulaic magnificence, which is not sold in stores, is something that machine learning might mimic convincingly. Then we could have every song made and all possible songs yet to be made performed for us by Zamfir; an infinity of Zamfir spread from man's darkest hour to the brightest vaults of heaven.
Zamfir is often sampled by contemporary musicians. Here's "Graze" by Animal Collective, which gets lit about 3 minutes in.