OK, ya got #1 - unfortunately, I'm still lookin' for the other 5 on the list, so LOL...
Whatcha gonna put in the sound booth, and how good does it need to be? In other words, please lay out your WHOLE scene - what's above the basement, what's around it, what kind of music, how loud, is the booth for drums/amps or just vocals, how good a carpenter are you, what's your budget, where do you live, can I borrow your car (ok, just kidding about the car)
Anyway, as much info as you can think of will make things easier - just pretend I'm a blind dude and you want ME to build this thing, and explain it from there... Steve