Virtual dimmer for LED's on H2

Hi guys!

I heard a rumor that someone had figured out a way to get a "virtual dimmer" when using LED fixtures on the Hog II. Does anyone know how to do this? What I'm looking for is the ability to attach an extra dimmer channel to an LED so that if I mix a color and then just want to dim that color down I don't have to mess with the color mixing to do so. Any ideas?
Thanks!
Seth
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