Em Esta entrevista com Gael García Bernal, ele fala sobre o quão difícil era para os atores fingir que eles estão tocando instrumentos, dizendo:
I think for all of us there's two who have had the most difficult job, which is Joel [Bernstein] and Saffron [Burrows]. Joel playing the violin and Saffron playing the cello. Because the cello is pretty big. You know, it's very graphic. You see the bow. You have to follow it the way everybody else is doing it. And if you look at somebody's face you see where their hand is standing. So, you can really tell how they're grabbing the strings here and the bow.
Mas depois, quando o entrevistador pergunta sobre uma "jam session" com alguns dos atores, ele diz:
A implicação, penso eu, é que os personagens principais são apenas atores, mas quanto aos outros na orquestra, músicos reais foram contratados para manter a ilusão de uma orquestra real.I mean the thing is, sometimes we can play the music that we're playing because there's real musicians in the orchestra. So, sometimes it's like, "Okay. Should we go for it?"