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