But now I need some help with a specific problem.
I work at a multimedia design firm. Most of our voice-over work is done at local (professional) studios, but we occasionally want to record a few things in-house.
We've been using a large storage closet that had some sound treatment, but now we're moving the office around and I have been asked to set up our small conference room for recording short client interviews and so on.
THE BIG PROBLEM: 4½ foot tall windows, that run from one end to the other, and a truckload of bounce. (We're on the 5th floor, so I don't have much noise coming through the glass; it's less than the noise from the HVAC, which is very minimal.)
So, I'm trying to figure out how to tame this room.
The windows (bottom at 3½ feet and top at 8 feet) and the door (8½ feet tall) severly limit what I can do with corner traps. One end has bookshelves that have a variety of books and objects. The long wall has nothing on it.
Here's the a rendering of one end of the room, and the floor layout:

What would you do? Traps and diffusers on the long wall? Set up Max Wall around the mic whenever we need to record? (Remember: we have to keep it "asthetic" for client meetings.)
Any thoughts or ideas will be appreciated... even if you tell me that it won't work.