- Titta Ruffo, Francesco Tamagno, Helge Roswange, Mattia Battistini, Pasquale Amato, Giuseppe Anselmi, Alfred Piccaver, Jose Mardones, Leon Escalais, Aureliano Pertile, Fernando de Lucia, Claudia Muzio, Giovanni Zenatello, Hipolito Lazaro, Celestina Boninsegna, Enrico Caruso, Rosa Ponselle, Lawrence Tibbett, Rolando Panerai
- Wilfred Engelmann, Lawrence Tibbett, Vina Bovy, Norman Cordon, Louis D'Angelo, Maurice Abravanel, George Rasely, The Metropolitan Opera Orchestra, The Metropolitan Opera Chorus, Angelo Bada, René Maison, Irra Petina, Arnlod Gabor
- Giuseppe de Luca, Anne Roselle, Richard Crooks, Studio Pianist, Studio Orchestra, Jan Peerce, Alberto Erede, Lionel Barrymore, Charles Hackett, Lawrence Tibbett, Dino Borgioli, Studio Conductor, Tino Pattiera, Studio ensemble, Lauritz Melchior, Anna Case, Margherita Grandi
