Riccardo Del Fra wrote a piece for jazz quartet and strings titled "Silent Call". The project was presented a.o. at the Paris Jazz festival. The conductor was Georges-Elie Octors. Michel Herr (piano), François Jeanneau (soprano saxophone/F), Riccardo Del Fra (double bass/composer/I), Joël Allouche (drums/F) + strings conducted by Georges-Elie Octors (B). Théâtre de la Ville, Paris (F), October 30, 1992.