Some of you might remember that in my new house the HT is going up in a "loft" running about 1/2 the length of the house. The floor of the loft is roughly 23' wide and 25' long, made up of 2x6 T&G pine over timber framing. The side walls angle in at 45 degrees so the peak of the ceiling is about 11-1/2 feet up. I gave the acoustics a "quick think" and (wrongly) concluded that modes wouldn't be a problem.
For some reason I was thinking that the distance from floor to angled wall to the other angled wall back to the floor would be different depending on where you measured, ie I would not have to deal with modes because there was no "constant distance between the walls".
Hey, guess what. I screwed up... whether I measure at the bottom of the wall, the middle of the wall or the top of the wall that path is the same distance, roughly 23 feet. From a room mode point of view, I think the effect will be the same as having a room 23 feet wide and 23 feet high. Dang !!
So, my wonderful "no modes" room just turned into something like 23x23x39 feet. Could be worse, I guess.
I think I'm out of my depth here, thinking about going to one of the good acoustics consultants for advice. Has anyone here dealt with Rives or someone similar ? Rives seems to have designed some very cool rooms for quite a reasonable price...
http://www.rivesaudio.com/examples/mrd/finish.html 
