Beniamino Gigli, Charles Kullman, Charlotte Boerner, Eleanor Steber, Elisabeth Rethberg, Francesco Valentino, Friedrich Schorr, Giovanni Martinelli, Hans Clemens, Kirsten Flagstad, Licia Albanese, Lorenzo Alvary, Lotte Lehmann, Mack Harrell, Nadine Conner, Raoul Jobin & Risë Stevens