- Algerd Brazis, Hertha Glaz, Lorenzo Alvary, Mack Harrell, Thomas Hayward, Emery Darcy, Osie Hawkins, Josef Greindl, Clifford Harvuot, Joseph Folmer, Paul Schöffler, Victoria de los Ángeles, Lawrence Davidson, Alessio De Paolis, The Metropolitan Opera Orchestra, Hans Hopf, Gerhard Pechner, Richard Holm
- Hans Clemens, Kirsten Flagstad, Eleanor Steber, Friedrich Schorr, Raoul Jobin, Lorenzo Alvary, Lotte Lehmann, Charlotte Boerner, Mack Harrell, Giovanni Martinelli, Charles Kullman, Beniamino Gigli, Licia Albanese, Risë Stevens, Francesco Valentino, Nadine Conner, Elisabeth Rethberg