What about using a cloud over the mix position and front 38% of the room?
It needs to be on your first reflection point, which is somewhere in that range. Normally hanging it over the desk/console is about right, but making it big to cover a larger area is very good.
I was planning to have a cloud from the beginning. I just want to know if having a cloud replaces the need for an angled ceiling since the cloud will be absorbing or at least deadening reflections from above. Or is there a middle ground?
You can do a "hard backed cloud", which sort of has the same general effect as an angled ceiling. The concept is simple: put a thick, hard, solid, rigid piece of wood on top of the frame that holds the cloud in place, then tilt the whole cloud: lower over the speakers, higher over your head.
Would it help to put a layer of drywall up on the inside of the exterior walls to add mass and a better seal the inside of the building off from the outside world before framing the inner wall of the booth?,
Yes! Definitely! That's called "beefing up" and is indeed a very good idea for increasing isolation.
Outside world-plank siding-1/2'ply-2x6 studs/insulated cavity- 1 layer 5/8"drywall- 2" air gap between framings-2x4 stud/insulation-hat channel on clips-2 layers 5/8" drywall(minimum)- Inner Booth
Welll, no, not like that. That would, as you say, be a 3-leaf situation. The way to do it is to beef up BETWEEN the studs on that wall, from inside the building. In other words, it would be: "Outside world-plank siding-1/2'ply - 1 layer 5/8"drywall - 2x6 studs/insulated cavity- 1" air gap between framings - 2x4 stud/insulation - 2 layers 5/8" drywall(minimum)- Inner Booth". Also note that I reduced the gap between framing to 1", and dropped the clips and channel... if the inner-leaf wall is already decoupled, then you don't need to decouple it again. You'd only need the clips and channel if the inner-leaf framing was not fully decoupled. Trying to recall if that's the case with your build, but I don't remember off hand... And I'm too lazy to go back over the thread right now, as it is 02:30 AM! I gotta get some sleep---...
- Stuart -