This project is implemented in such a way that the lights glow according the music. This music operated running lights circuit uses IC's. The music (sound) signals are sensed by a condenser microphone which is then amplified by an IC. The outputs of the IC are fed to the transistors to drive bulbs LED's those dance as per the music played. One variable resistor is required for microphone sensitivity and another for maximum performance.
For complete information about this project, visit http://www.edgefxkits.com/rhythm-following-flashing-lights