Robert Barnard is amazing in the way he takes social commentary, disguises it as page-turning fiction, then adds a murder mystery to give it a little extra zing. He's done it in every one of his books that I've read.
Death on the High C's is a sly look at the workings of a provincial opera company preparing to stage Rigoletto while a murder investigation takes place in their midst, but you don't have to be an opera buff to enjoy the shenanigans.
Familiarity with the subject of any story will, of course, enhance your enjoyment of it, but Death on the High C's works, as is usual with Barnard, as flavorful social commentary spiced with murder mystery.