Many of you are probably familiar with the process, a process I discovered by accident and found quite useful. You want to record a guitar track with a stereo image, and to save time you simply record one guitar track, copy it to another track, pan the two hard left and hard right, then bump one slightly ahead of the other. The result is a good stereo image in headphones, but occasionally I noticed that I lose the stereo image and it jumps to the center. I noticed this affect only happens in headphones, and different sets of headphones exhibit the effect differently. My uneducated guess is that this is Phase cancellation taking place. Has anybody else encountered this?