2nd story "acoustic" studio

Hello, First off, I must say that I am grateful to have found this site, it is a wonderful resource and I have learned a lot by visiting over the last couple of years! I am currently in the process of putting together a small home studio in an oddly shaped 2nd story space. My eventual goal is to create a decent room for recording and mixing acoustic music (bluegrass/newgrass type of stuff) and I have a couple of initial questions for any experts out there. [Hopefully a SketchUp image with dimensions of the space will be visible in this post]: 1. First off, I'm trying to determine where the best mix position in this room would be. I'm familiar with the 38% rule, but as you can see in the image, there is a walk-in closet and stair case that takes up a portion of the width of the room. If I were to place my monitors facing down the length of the room (toward the closet/stairs) would I want my mix position to be 38% from the front wall relative to the closet (~18') or the far back wall (29' 1/2")? 2. I'm a bit concerned about the angles of the walls/ceiling and the potential build up of bass frequencies. I currently have some 4" thick 2x4' "bass traps" (OC703) in four corners of the room, as well as a couple 2" thick 2x4' clouds hanging over my current mix position. If I were to put up more 2" or 4" thick 2x4' OC703 panels, do you have any suggestions of what corners/angles to straddle or any other absorption suggestions? Also, do you think I need to treat the alcove in any way? Other info about room Ceiling = Cardboard tiles Angled walls = Wood/particle board Vertical Walls = Wood paneling over studs (I think) Floors = Carpet (will be pulling it up where I mix and track) Thanks in advance for any insights you can provide! -Tony

put the desk facing the window on the end. add broadband trapping wherever you can. don't kill off the space entirely - use absorption sparingly - start with traps and first reflection points.