I think this is important, so I put this one into the FAQ, with some more comments of my own.
Re-editing the original question it for the FAQ, I noticed this line:
, in the case of the vocal it goes strong left, and as it moves to center it fades to inaudibility and at some point as it moves to left it returns to full volume.
That should have tipped me off right away. I can't believe I missed that. (/me kicks self in head again.)
I've gotta read posts more carefully before I spout off.
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Tony Fabris