Don - Thanks, yeah, its comming along. I'm at the point now where as long as something - anything happens everyday, I'm happy. Oh, and BTW, I did all the framing myself.
ausrock - I thought about doing a half moon, or half round window above the door. It would be in keeping with the architecture of the main house, but I just think it would blow the STC rating.
kristian - I agree, ambient, natural light is a huge plus. Outside of my own projects, I'm targeting the studio for unsigned bands and demo's. Most working musicians I know have the proverbal "day job" and work until around 7:00 or 9:00pm. I expect the busiest times to be from 8:00 to midnight or later. Not much daylight during those hours.
The control room doors lead to the patio outside, and those are a double set of double glazed sliding doors. So natural light will flood the control room, and drum room, with some filtering into the live room via the control room windows, so it wont completely feel like a cave.
Outside of the home project studio, I haven't seen too many studios with windows, and those that do have them look for ways to block them up.
I purposely left exterior windows out because I didn't want to sacrifice STC ratings, particularly in the live room.
Bruce - The ceilings will be a big plus, and aid in the draw to the studio; I hope. They're higher than I imagined. It feels like a cathedral in there.
Thanks everyone, I'll keep you posted with updates as construction progresses.