The overture is also interesting because it is an early example of one note music -- which is a major modern phemenonInteresting you should say that. The recommendation Das Rheingold received that the others didn't wasn't for the full opera, but specifically for, "Act II, Entry of the Gods into Valhalla". I should perhaps have annotated the entry in the listing.
Hold a single note or chord for a whole hour, and call it music. (good-music-guide.com)