Just got mine last weekend. Finally had a chance to fiddle with it. Trying to play a song from the music library to jam along. From what I can tell when I put the phones on the music is there but not the guitar. Tried the large dial button in red mode and white mode. I have the back switch in amp position(depressed). I may just be doing something wrong. At first I thought the music would be coming out of my amp with the guitar mixed...adjusted by white mode on large dial. Somebody steer me right?