Sibelius, Beethoven, Satie, Debussy
And one of the characters is, allegedly, an obvious reference to Marin Alsop; she is not best pleased. The director has denied that Tar is based on anyone.One of the characters in the film is an obvious reference to Gilbert Kaplan, which Mahlerites might find amusing.
Only just released here (10 days ago). I think I don't need to see it on the big screen.