The Atari Video Music, released in 1977 for $169.95, is a pioneering electronic music visualizer that creates animated visual displays in response to music. It connects to an audio source and features a switch box that can be attached to a television display. The system translates musical intensity and mellowness into colors and shapes, with the left audio channel represented by the outer part of a diamond and the right channel represented by the inner part. The Video Music system was praised for its construction and described as relaxing, stimulating, or therapeutic to watch psychedelic displays. Its production was discontinued after one year on the market. The product made appearances in popular culture, such as in music videos and movies.
https://en.wikipedia.org/wiki/Atari_Video_Music