Between 1947 and 1954, she sang the leading soprano roles in four of
conductor Arturo Toscanini's concert performances of complete operas
broadcast live on NBC Radio. All were released on LP and later on CD.
One of them, Verdi's "Aida", was the only complete Toscanini-conducted
opera ever simulcast on television and radio. Her appearances in
Toscanini-conducted operas also marked the last time that Toscanini
conducted these works in his extremely long career.