As soon as I heard a couple of the songs on the Being Flynn Soundtrack, it brought back memories of having to practice Bach's Goldberg variations on the piano, especially on "Asleep At The Wheel" & "Jonathan Goes to Work" with the characteristic Bach counterpoint melodies. Both are lovely piano and cello duets.
As it turns out, the producers gave composer Damon Gough the direction to create "Bache-esque" compositions for De Niro's character. "Priest" has a foreboding feel you can imagine Yo-Yo ma performing.
In the meantime, the producers temped the movie to some of Damon's previous songs especially the ones for Paul Dano's character, so he was in the unusual position of having to replace some of his own songs with new original music which according to Damon "was a new experience for me, and felt quite weird initially, but I’m really happy with the result."
Director Paul Weitz was thrilled to work again with Damon Gough noting that "Scoring a movie with an orchestra is magical, but knowing that one of your favorite songwriters has written songs inspired by work that you’ve done is uniquely meaningful.” Weitz was probably referring, in part, to some of the original songs with lyrics that Gough wrote including "It's Too Late" with its modern 3/4 waltz stutter and the mellow songs "Another Day, Another Night" and "Let It Rain" which musically underscore the movie's themes.
Source: Focus Features & Lakeshore Records Press Release