 Her other roles includes Adalgisa in "Norma", the title role in "Carmen", Erda in "Siegfried" and "Das Rheingold", Brangäne in "Tristan und Isolde" and Orpheus in Gluck's "Orfeo ed Euridice", the latter being a role with which she became particularly associated.She has also performed with many of the world's premiere orchestras, including the New York Philharmonic, Los Angeles Philharmonic, Cincinnati Symphony, Chicago Symphony Orchestra, Philadelphia Orchestra, Cleveland Orchestra, San Francisco Symphony, Toronto Symphony, Orchestre de Paris, Berlin Philharmonic, London Philharmonic, Montreal Symphony and the BBC Symphony Orchestra to name just a few.Quivar has taken on the task of rescuing the works of forgotten composers, concentrating on those of African-American composers of the 19th and 20th centuries.