Beginning in the late 1970s she began to tackle soprano roles, including Selika in "L'Africaine", Judith in Bartók's "Bluebeard's Castle", Lady Macbeth "Macbeth", Madame Lidoine in Poulenc's "Dialogues of the Carmelites" (Met1977), Tosca, Norma (from Boston 1976 till Messina 1989), Aida (Boston 1980 and 1989), Desdemona ("Otello") (1981), Leonore ("Fidelio") (Met 1983), Iphigénie (1984–85), Alceste (1985), Médée (Cherubini) (1986). Her Tosca was televised by PBS on "Live from the Met" in December 1978, just six days before Christmas. She sang the role opposite the Cavaradossi of Luciano Pavarotti and the Scarpia of Cornell MacNeil.