- Richard Tucker, NBC Symphony Orchestra, Arturo Toscanini, Giuseppe Valdengo, Herva Nelli, Eva Gustavson
- Norman Scott, Marie Janger, Robert Nagy, Carlo Bergonzi, Zinka Milanov, The Metropolitan Opera Orchestra, Giorgio Tozzi, Frank Guarrera, Ezio Flagello, Dimitri Mitropoulos
- Ruzena Horakova, Victorio Bacciato, Chorus of Teatro Colon, Richard Tucker, Mario Verazzi, Mignon Dunn, Gré Brouwenstijn, Norman Scott, Giulio Viamonte, Virgilio Tavini, Fernando Previtali, Orchestra of the Teatro Cólon, Aldo Protti, Guerrino Boschetti
- Antonio Spruzzola-Zola, Orchestra del Teatro La Fenice di Venezia, Gertrud Grob-Prandl, Norman Scott, Renata Ferrari-Ongara, Franco Capuana
- Fausto Cleva, Madelaine Chambers, The Metropolitan Opera Orchestra, Margaret Roggero, George Cehanovsky, Mildred Allen, Louis Sgarro, Calvin Marsh, Leonard Warren, William Wilderman, Roberta Peters, Eugenio Fernandi, Norman Scott, Thelma Votipka, Gabor Carelli
- Flaviano Labò, Mignon Dunn, Luisa Bartoletti, Italo Pasini, Norman Scott, Carlo Felice Cillario, Tullio Gagliardo, Aldo Protti, Lucille Udovich
- Marko Rothmüller, Leonie Rysanek, Hermann Prey, Irene Dalis, Georg Solti, Norman Scott, Hans Hopf, Robert Nagy, Paul Franke, The Metropolitan Opera Orchestra, Mildred Allen