The definitive portrait of the German synth-rockers whose inimitable sound defined 80s cinema – and inspired the music of Stranger Things.

For almost 50 years, Edgar Froese, the mastermind behind Tangerine Dream, made music fit for the space age. A master of the Moog synthesiser (and a whole lot more besides), Froese and a rotating cast of sonic adventurers created a dizzying sequence of albums and film soundtracks that serve as one of the great surveys of the history of electronic music. From Risky Business to Sorcerer to Grand Theft Auto V, Tangerine Dream charted a course through the outer limits of recorded audio, and in doing so changed the face of popular music forever.

Filled with never-before-seen archival footage – including remarkable glimpses of their 1970s Australian tour – Revolution of Sound is filmmaker Margarete Kreuzer's tripped-out tribute to Froese, who died in 2015, and the incredible music he created. Told through interviews with Tangerine Dream's many, many band members and collaborators such as Jean-Michael Jarre, Michael Mann and Paul Brickman, Revolution of Sound is the definitive document of one of the least heralded, most important bands of the 20th century.