Wilhelm Grüning, Maria Farneti, Sibyl Seligman, Studio Orchestra, Victoria Theodorides, John McCormack, Eugenia Burzio, Elena Theodorides, Clohilde Bressler-Gianoli, Giuseppe Bellantoni, Studio Pianist, Elvino Ventura, Studio Conductor, Lucy Malata, Fausta Labia, Luisa Bianco-Tamagno, Alfred Galand, Marie Therese de Segur, Rosina Storchio, Aino Ackté, Jeanne Bourdon, Emilio Perea, Riccardo Stracciari, Georgette Brejean-Silver, Michael Vlachopoulos, Malka Bobkova