sleepy:
believe it or not, I actually spent a couple of years studying acoustics (on my own time, aside from work).
What you see is actually an "almost done" true box-in-a-box soundproof design. It has 2 layers of 5/8" drywall on each side, with the inside decoupled (using "channels") from the studs/framework.
The "box" stands on isolating rubber feets (12" spacing).
The stuff is HARDCORE cool!!!
... they could do a show on THAT one day
THE THING IS
I am SO busy (work + being a dad), I never got around to finish the (reflective) floors and treat the room...
Not mentioning the lack of air circulation gear (there's just a "hole" at the moment - works okay).
So time was the issue really... I told the guys when they filmed, but you can't always plan things correctly.
Another bad timing issue was the fact that my mixer (Tascam DM24) is in the repair shop... Hence the tiny backup mixer you see (crappy $50 behringer).
I think I'll try to get the floor and treatment this year... It's a time issue more than anything.