Mellodrama, a documentary by Dianna Dilworth, explores the rising and falling fortunes of the Mellotron – the first musical keyboard to "sample" the sounds of other instruments – from its birth in a California garage in the 1950s, through its dominance on concert stages in the 1970s, through its almost religious cult of followers in the 2000s. From the Beatles' "Strawberry Fields" to Black Sabbath to Opeth and Maroon 5, Mellodrama is a 70-year odyssey of musical invention, revolution, betrayal, and rediscovery.

Watch the film here.