I just recored a vocal on track 4 and input B. When I recorded the track I could hear it in both my left and right ears of the headphones. On play back I am only getting it in the right ear. I checked the pan and it is centered. When I try changing the pan setting nothing happens. The track continues to playback in the right ear only. All other tracks are playing back in both ears. Has anyone had this problem or have a possible solution? Thanks! Billy