Decoder (1984)

Plot

F.M. stumbles upon an intriguing phenomenon: various sonic frequencies can manipulate listeners' behaviors. Initially, he experiments in his studio, but soon his curiosity leads him to the local H-Burger restaurant. There, the seemingly innocuous muzak oddly suppresses patrons' emotions, raising concerns about the impact of sound on feelings and social interactions. As F.M. delves deeper into this auditory mystery, he uncovers unsettling truths about the power of music and its potential to control minds, setting the stage for a thrilling exploration of sound's influence in everyday life.