I used a CLICK with a 4-20 ma input clamped around the cnter channel of my sound system. Not the best but i did split it up to cycle 8 Strings of LED xmas lights if the system is on. Otherwise it uses a drum to cycle them. I was wanting to prodcast the music but well, I left the side door of my utility box open then tried to drive out of he garage. I made it, but the garage took a good shot. Like the whole SW corner. Bah humbug.