When physicist John Smith spent the night in his garden with the score to Götterdämmerung, the final opera in Richard Wagner’s four-part, 15-hour epic, Der Ring des Nibelungen, he wasn’t interested in its account of the apocalyptic struggle of Norse gods for control of the world. Smith was concerned with a struggle of a different sort—one between the opera’s words and music that might elucidate the controversial German composer’s peculiar vision for the future of art.