I have been trying to dub better sound by using the line input and a hand held mic. Problem is no matter what I do, set the switch to line instead of mic, use the line 1 & 2 instead of auto on the side panel, and used the power to the mic for whatever line input I want to make hot, I still cannot get sound over dubs using the line 1 or line 2 input. I've done all the manual requires, or at least I think I have. Any advice would be greatly appreciated.