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