lights and sound

[djkym]

i think i heard of it before, but has anyone ever tried hooking up a cold cathode to their sound system so that it lights up to the bass? if so, is there an easy way of doing it?

 

[bwass24]

On ebay I've seen many cold cathodes with a circuit specially designed to react to sound. They're around the same price as the normal ones. For example

Or, you can make one using a tiny microphone and one of these..