ट्रिविया

French visa # 154093.

The four actors playing the four musicians are all actual musicians, although not at a professional level (except Daniel Garlitsky, who plays Peter, the blind violinist). Even Frédéric Pierrot, who plays Charlie, the composer, plays the flute and the clarinet (which he learned to play on his own).

In the movie, Astrid has just lost her father. In real life, Valérie Donzelli, who plays Astrid, lost her father not long before shooting, which, while being a tragedy, fed her performance.