Room dimensions-Acoustics Forum-Acoustic Fields Forum

hello all.
I presently try to mix and master in a small dining room. The room is no longer contained but knocked through into the lounge. A large arched opening is all that separates the two areas. When calculating room dimensions does this fact (that they are as one) come into the overall volume? Or does this room still class as one small room? Does this have any advantage (seeing as technically it’s one large room) or does this hinder the controlling of the sound? I have tried to treat the room with hand built panels but analysis shows a hollow around the 100Hz and a peak around 50Hz (they are the worst ones).
Should I move the speakers to fire down the length of the lounge/dinner?
the mixing area is aprox
floor to ceiling 98.5 inches
front wall to back wall 126 inches
Side wall to arch 138 inches

Behind me is a paneled wall that covers the stair case and probably resonates like a large drum! I can open the under stairs cupboard and see the exposed brick of the party wall. This would add a further 31inches to the front wall to back wall measurement.

I use a room correctional software package that may or may not be snake oil. It shows the nasties and does it’s best to correct the faults but I’m still not satisfied (am I sick?). I notice that I am able to mix more comfortably when it is enabled. With it off my right ear gets a real hammering from the low end.

I have sent in a form but I was unable to submit enough photos to build an image.