I think this performance of Gotterdammerung is a revelation and Grob-Prandl obviously amongst the greatest of Brunnhildes. A real discovery for a Wagnerian who thought he knew everything about post war performances of The Ring.

I used to have this recording on CD. Gertrud Grob-Prandl is (IMHO) substantially better than any other Brunhilde I've heard, including, better than Birgit Nilsson. GGP has more depth than Nilsson; also more volume (!), tighter vibrato, better pitch, better musicality and attention to nuance, better German pronunciation, and a unique burnished-steel tone,Ludwig Weber is one of the great Hagens. Not as distinctive as Gottlob Frick nor as subtle as Josef Greindl nor as big as Matti Salminen, but fierce and evil-sounding.The principle weakness is Gunther Treptow, who, as usual, sounds hoarse, shouty, and even whiny. Even when he's singing well, he sounds as if he were about to crack. Another less-important but still offensive flaw is Adolf Vogel's Alberich. He sings with no line, no legato, no music, a sequence of disconnected barked syllables. Before the age of Gustav Neidlinger (PeaceBeUponHim) Alberich was often sung this way. Vogel also acts with no sympathy or pathos. This is, I suppose, a legitimate approach to Wagner's villains, but the RING is always more interesting if you can feel sorry for them. LOHENGRIN, too.