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