Декодер (1984)

F.M., a sound engineer, discovers that sound frequencies powerfully affect people. Working in his studio, he experiments with audio waves and observes their emotional and mental impact. His curiosity takes him to a local restaurant, where he notices something strange: the background music seems to dull customers' emotions, making them almost robotic. The film follows F.M. as he explores this world of sound, examining how it connects to human psychology and behavior.