I am new to this home theater thing and have discovered an irritating problem.
I have the Onkyo SR705 receiver and have found that my HD broadcasts thru my
cable box deliver a substantial increas in the volume levels of sound during the commercials. Is there something in my receiver that I can set to equalize the sound
volumes between the regular shows and the commercials?

If not on the receiver, is there anything that can be added to my system that would do this?

I really appreciate this forum as a resource, you folks have been a great source of advice.