If you have an Arduino or equivalent kicking around, it's also pretty easy to rig up an LED to flash at the same frequency as the beats. Mine looks a little rid

If you have an Arduino or equivalent kicking around, it's also pretty easy to rig up an LED to flash at the same frequency as the beats. Mine looks a little ridiculous though. http://burkelibbey.org/brainwave.jpg http://burkelibbey.org/brainwave.jpg