Well, I'll tell you what I've been able to do.
When I plug my mic (or guitar) into line 1, I only hear sound on the left side of my headphones. When I plug it into line 2, I only hear sound in the right side of my Headphones. The Line levels, Trim, and Master volume all work. The VU Meters only work when the switch is on "PGM". And no matter what "Rec Function" I have it set to (1,safe,3,2,4) Only meters 1 and 2 work. The First meter shows only what i have in Input 1 and the second only show whats in input 2. And no mater what i do, It will not record for me.