Basement studio build in a new construction home

After looking at the cost of double paned insulated glass sliders I figured it might be a little more economical to just use regular $300 6' sliding glass doors that I can get at home depot but do them in an "airlock" style, so the sound will have to go through 2 sets of doors before it leaves the room. I have angled the inner set at 12 degrees so the glass is not parallel, is this enough of an angle? or is the angle even necessary? I'm also including a diagram of the inner wall/ceiling structure. It seems like this wall structure and door layout idea should be effective, what are your thoughts? I will deal with the live room modes by treating with slat resonators as advised. does anyone know of where I can get a digram of how to construct the slat resonators? I'm not really sure what they are made of. -Jim

Ah yes, I knew there was one more question that I forgot to throw in there. I'm going to have one Duct in and one Returning from the Live Room, how do I go about making sure that sound isnt going to escape to the rest of the house through the ducts? I'm looking for a pretty heavy duty solution, one that would give me the most sound reduction possible as I am spending a small fortune on this room and I want to make sure that all if that expense isnt compromised by the AC.

pop over to the construction forum - quite a lot of info on HVAC and ducting... slat resonators - check on John's SAE site and his wall unit page.

sticking to the ratios and what I can fit in my space, my live room should be 8'4" (H) X 11'6 X 15'8. I could fit about 16' X13', is it worth it to sacrifice the extra room I can fit in order to met the proper mode ratios? or is it better to have the extra space and then use treatment to deal with the modes?

close enough is usually good enough - especially if there little or nothing you can do about it... so if more space is better for you, then go with more space and if the mode difference isn't great then just use other treatments. the only time this doesn't work well is if you create a room where the treatments would occupy as much (or more) space as doing the other way...

noted. thank you. would this be an appropriate way to incorporate useful angles into the correct modes? creating non-parallel walls (12 degrees off) but keeping close to the square ratio recommendations?

just a few updates

I know I dont have the ideal dimensions for a live room but are there any suggestions on how to treat it (slat resonators, absorders, clouds, etc...)? the live room is going to be used mostly for tracking drums so I do want the room to be somewhat "live" I'm dreaming of huge drum sounds. The other question was how I should layout my control room, not sure if I should do it long ways and have a long narrow room with the monitors pointing to the out side door, or if I should have a wide room with the monitors pointing towards the live room. also any treatment ideas here would be great as well. -Jim. oh, other important info. I'm going to have engineered hardwood for flooring in both areas.

You don't have the ideal dimensions for you pics too :roll:

for a drum room, i'd opt for slats and diffusers to keep the space lively, then add in porous absorption as needed to change the room character. maybe some reversible treatments?