Many years ago there used to be a consumer product that gave a video display of music being played over a stereo system. It looked similar to a stereo speaker but with a Plexiglas front. There was an electronic bridge inside that converted and sent the audio frequencies to various lights - bass was red/orange - midrange was yellow/green and high was blue/purple. The intensity of the lights was directly related to the loudness of the audio frequencies. Does anyone make a simple to use Mac program that will do the same thing by displaying on the computer screen? Not just a random display - but something were audio frequency/volume is directly related to color/brightness.