The Rome Symphony Orchestra, Wolfgang Windgassen, Magda Gabory, Elsa Cavelti, Wilhelm Furtwängler, Ferdinand Frantz, Hilde Rӧssel-Majdan, Martha Mödl, Hilde Konetzni, Olga Bennings, Gottlob Frick, Gerda Scheyrer, Ira Malaniuk, Judith Hellwig and Dagmar Schmedes