- Claudia Muzio, Gladys Swarthout, Lorenzo Molajoli, Marcel Journet, Studio Chorus, G. Tarragó, Dorothy Maynor, Rosario Bourdon, Renata Tarragó, Hulda Lashanska, Clarence Dickinson, Studio Orchestra, Armand Bernard, Richard Crooks, John Charles Thomas, Rosa Ponselle, Lawrence Tibbett, RCA Victor Symphony Orchestra, Richard Tauber, Henry Geehl, Mogens Woldike, Margarete Matzenauer, Trinity Church Choir, New York, Georges Thill, Stewart Wille, Carroll Hollister, Edwin Schneider, Ernestine Schumann-Heink, Victoria de los Ángeles, Aksel Schiøtz, Elisabeth Schumann, Ladies' Chorus, Giovanni Martinelli, Milton Katims, Paul Reimers, John McCormack
