[Wayne A. Pflughaupt]

brucek wrote:

I suspect I could find a suitable example of REW removing a modal resonances, but I don't think that would convince you.

Try me. After all, I became a skeptic by examining the graphs. I fully recognize that my own room is all I have to work with, and that things could be different in another room – or even every other room! (Probably should have mentioned that sooner - sorry... )

I do take exception to the level adjusting in your example though. If I had a signal that was at +20dB and I reduced it by some means by -20dB to eliminate its effect, you can't raise the result by +20dB and say, "see, it's still there".

It’s valid comparison because we don’t keep our systems at a static level. We turn them up and down. It’s well known that signal decay times are directly related to signal level. Level matching simply takes that factor out of the equation for examining the signal decay effects of modal filters. Otherwise a cutting filter has an unfair advantage merely by the effect of reducing amplitude: “See, it reduced the ringing!” Um no, it didn’t...

Regards,
Wayne