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