What are these two lights for?

My computer won't accept facebook links.

Can you upload it as an attachment so everyone can see it?

Play a Rig with a stereo delay in that slot and watch the lights.

I've never looked at them but would assume that they'd indicate activity. I'm guessing that a stereo delay would have each channel reflected by one of the lights.

Did you try it?

I've been scouring the manual and no luck so far...