Kinda new to complicated amps and need some help. I have my guitar plugged into main inlet and a mic plugged in. When i press record and play a song on my guitar  while singing and when I am finished i push stop. And then push play to play back my recording. I get good loud lyrics but the guitar is very faint in the back ground.I have checked evrything I can any Ideas. Amp is Line 6 Spider Jam. Thanks in advance.