In 1975, BBC spelled out how MUZAK — and musical power – worked, maybe

It’s a master class in Western “common practice” music and its power. It decodes complex music theory and its impact on the mind. It’s also got some deeply entertaining action with a bearded psychiatrist operating a reel-to-reel machine and filters. Let’s watch this 1975 episode of BBC’s Horizon on the science of music and MUZAK.