Harps are also part of the music in "Das Rheingold."

"Therefore, nothing of music's primacy. As every other resources involved in the work, it was also subjected to a superior dramatic finality -- of which served it as motivation and justification. Wagner didn't want to 'simply' compose music, but he aspired producing the synthesis of all artistic manifestations: in one word, Gesamtkunstwerk." (Perpetuo)