In this song by Joe Satriani (
) he has a absolutely great lead tone, but I'm not talking about the distortion or the wah... After listening in headphones I heard that while the 'dry' guitar signal is punching in the middle, you've got a sub-octave panned left and a higher octave right. Sounds very, very tasty!

At first I believed he recorded multiple tracks but I'm not so sure about that because they sound almost to tight you know. So I guess he's using some kind of effect... Could it be the POG? I'm not sure if the POG does panning though...?
Of course, he might just have addded this stuff in the studio as well... But I don't know, anyone got any ideas?