I'm surprised that no one has mentioned Paulette Jiles's "Simon the Fiddler" (2020). A folk-music novel if there ever was one, set in Texas after the Civil War. Jiles wrote "News of the World" (which has its own folk references), made into an excellent film starring Tom Hanks. "Simon" takes a minor character from "News" and puts him at center stage. Traditional music is so omnipresent that it's almost a character on its own.