We talk to Jessica Wolfson and Paul Lovelace, directors and producers of the 2012 documentary Radio Unnameable - "a visual and aural collage" that tells the story of legendary NYC disc jockey Bob Fass, who pioneered free expression on the airwaves with his long-running FM program 'Radio Unnameable'. They discuss the challenges of creating a visual document about a radio show; the process of listening to thousands of radio archives; and the significance of Fass' work, today.