The documentary’s catchy title, Keep On Keepin’ On, comes from the legendary trumpeter Clark Terry, now 94, a line he uses to inspire young musicians: Justin Kauflin, a blind pianist composer he’s nurtured, could not attend the special Summerdocs screening at Guild Hall in East Hampton on Friday night. Now in Los Angeles recording an album with Quincy Jones, Kauflin’s one of Terry’s successful students in jazz, but so is the Australian drummer and surfer who made this debut documentary, winner of the Audience Award at this year’s Tribeca Film Festival; the filmmaker Alan Hicks also took home the award for Best New Documentary Director. At a pre-screening cocktail party at The Maidstone, I had the opportunity to ask him how an Australian came to this landmark American music, and how he made his first film on a jazz legend’s story.