Control Room Ceiling Treatment

Hello all, My studio construction just finished and I am in the process of putting acoustic treatment on the walls. The question I had was about ceiling treatment. My ceiling height is 7'9", I have Pergo flooring in the room. Currently, I have some custom made OC703 (3") panels in all four corners and front and back walls. You can see te pictures here: http://www.johnlsayers.com/phpBB2/viewt ... 2&start=30 With these panels, when I clap in the room I hear a slight ringing sound that seems to be coming from the ceiling. I am hoping that when I put all my equipment, a couch and a rug in the room this ringing sound will go away. Do you think I should go ahead and put some treatment on the ceiling? If so what would be better considering the ceiling height and the flooring? Do I need absorbtion or diffusion? I was thinking about putting a mix of auralex diffusers and absorbers right above the mix area, since they are not so thick. I would really prefer to treat the ceiling before I move all my equipment in there. Thanks in advance for your help.

I seem to remember reading some time back that if you have low ceilings, it's good to put some type of absorption up there. :D

Oh Yeah and avoid the rug in the room. Just trap that ceiling. I ended up using 3" Rock wool in my ceiling and it really mad the mids gel even beyond what I had acheived with all the other construction :)

Hey Giles- I noticed that you're in the Motor City. I'm about 40 miles west of you. Got a project/home studio thingy going on here. Might I ask where you obtained the rockwool mentioned in this thread? I finally got some 703-- but it took many phone calls to get it. My low ceiling needs attention and maybe the product you've used is the ticket. Let me know, if you will. And--thanks to all of you guys for the input in this forum. It's appreciated.

Oh Yeah and avoid the rug in the room. Just trap that ceiling. I ended up using 3" Rock wool in my ceiling and it really mad the mids gel even beyond what I had acheived with all the other construction

Giles, Was it in your ceiling or did you do clouds? If clouds how did you do it? I have 11 4x8 sheets of 3" rock wool left and I want to use themfor clouds above the mix position. Thanks, Dave