- amelita Galli-Curci, Giuseppe De Luca, Tito Schipa, Josef Pasternack & Rosario Bourdon
- Beniamino Gigli
- Alessandro Bonci, Giuseppe Anselmi, Lina Cavalieri, John McCormack, Rosa Ponselle, Giovanni Zentella, Maria Sammarca, Ferdinand Ansseaau, Mattia Battistini, Claudia Muzio, Enrico Caruso, Elisabeth Rethberg, Richard Tauber, Rosa Raisa, Aureliano Pertile, Emmy Destinn, Alfred Piccaver, Florence Easton, Antonio Cortis, Dmitri Smirnov, Anne Roselle & Giovanni Martinelli
- NBC Symphony Orchestra, Robert Merrill, Arturo Toscanini, Arthur Newman, Johanne Morland, Maxine Stellman, John Garris, Paul Dennis, Licia Albanese, George Cehanovsky & Jan Peerce
- Studio Chorus, Lawrence Tibbett, Studio Orchestra, Studio Pianist, Alexander Smallens, Stewart Wille, Wilfrid Pelletier, The Metropolitan Opera Orchestra, Richard Crooks, Mark Andrews, Kirsten Flagstad, Lauritz Melchior, Karin Branzell, Eugene Goosens, George Cehanovsky, John Engelman, Giovanni Paltrinieri, Gennaro Papi, Nicholas Massue, Ettore Panizza, Artur Bodanzky, Susanne Clemens, Gabor, Wolfe, Alfred Newman, Earl Covert & Zaruhi Elmassion