Don Letts is an unsung hero of British music. “Superstonic Sound: The Rebel Dread” is a documentary about the Letts family legacy that mirrors the history of BASS in the UK from Dub, Reggae and Punk to 80s pop, Hip Hop and Dubstep; a musical, cultural and personal link between past and present. Don’s father was amongst the first Jamaican immigrants to Britain and he brought his sound system with him