- New Friends of Music Orchestra, John Wummer, Rudolf Kolisch, Amsterdam Strings, John Meisner, Edith Weiss Mann, Otto Klemperer, Dorothy Chester
- Marcel Mule, Lucien Thevet, Marcel Tabuteau, Maurice Allard, Fernando Valenti, Alexander Schneider, Gilbert Coursier, Leila Storch, Pau Casals, Paul Tortelier, Prades Festival Orchestra, John Wummer, Isaac Stern, John Mack
