The Pulitzer-winning composer David Lang wasnt always a revered figure of the citys new-music scene. He started off like every other musician, unknown and rejected, and that prepared him for his latest role: writing the music for the film (Untitled). Adam Goldberg plays a tortured composer named Adrian, whose compositions (some beautiful, some ridiculous) are written by Lang. A founder of the now-iconic Bang on a Can collective, Lang drew on his scrappy early years to channel Adrians passion an....

