I just bought a sound activated neon light, well it actaully came with my new case. There is a switch on the light that makes it always be on when the computer on or it can be switched so it is only on while it hears a sound. sooo.... If I have music on it will pulse with the sound and volume. It also will be activated if I clap my hands near the light. So it just turns on from ANY sound basically. computer based or not.