Color music is a new comprehensive art. It was developed by integrating music, optics, electronics, mechanical engineering, laser and other disciplines. In the early days of the birth of color music instruments, they were electronic control devices. When the melodious music signal passes through the electronic device, part of it controls the brightness of the light source, and the other part is divided into three channels of high frequency, medium frequency, and low frequency through a frequency divider. These three channels are connected to three groups of red, green and blue lights respectively. As the cadence of the music changes, the colors also change.