Orchestra and Choir of the Metropolitan Opera House, Erich Leinsdorf, Walter Olitzki, Friedrich Schorr, Emanuel List, Max Altglass, Louis D'Angelo, Herbert Janssen, George Chehanovsky, Nicholas Massue, Ludovico Oliviero, Giovanni Paltrinieri, James Wolfe, John Gurney & Chorus

Orchestra and Choirs of the Metropolitan Opera House, San Francisco Opera House, Vienna Philharmonic, Erich Leinsdorf, Bruno Walter, Arturo Toscanini, Cesare Sodero, Sir Thomas Beecham, Gaetano Merola, Italo Montemezzi, Hans Hermann Nissen, Lotte Lehmann, Charles Kullman, Heinrich Schorr, Irene Jess