She is especially remembered for her singing of the music of Mozart and Richard Strauss, but she also sang in other composers' operas; the title role in Puccini's "Madama Butterfly", Marie in Alban Berg's "Wozzeck", Eva in "Der Meistersinger von Nürnberg", Blanche in Poulenc's "Dialogues des Carmélites", and the title role in Janáček's "Káťa Kabanová". She was a great "lieder" singer and several of her Salzburg Festival recitals were recorded. She left many recordings of oratorio and sacred music by Bach, Mozart, Haydn (including at least four different performances of the Angel Gabriel in "Die Schöpfung"), Brahms, Fauré, Beethoven, Dvořák, and Stravinsky.