Well, maybe it's only a matter of my comfort level, or maybe the interconnects affect it, even optical digital? All I can say is:

First, my channels do NOT balance at the same levels when using the Avia tones that they do when using my receiver's internal test tones.

Second, I tend to trust the Avia tones more. For one theing, because they are coming from the same DVD player that will be sending my movie signals. For another, because I think Avia might have placed just a bit more emphasis on producing accurate tones: after all, it's their job, not just "another circuit we have to include in the receiver at the lowest cost possible."

I would think that if the Avia tones were inaccurate in any way, someone would have caught on by now.

-Bruce