Hi. I was hoping i can get your professional opinion on this. I have this vocal booth that is about 8x6 with a ceiling thats about 8feet high. I have a window on one of the 8ft walls. I was wondering if I would benefit from having diffusers in this booth and if so, what wall/walls or ceiling would be best to put them on. All the walls are going to be covered with 3 inch roxul from top to bottom covered in breathable fabric. I attached a diagram with the walls labeled A B and C. C has a a door in the corner as you can see. Thanks in advanced!
That's not a way too small of a booth so as long as you really do need the isolation; you could do worse. For example, I don't need a booth for vocals (or anything) I just record in the main (only) room, I just can do it when the rest of the house is quiet. Your situation is most likely different.
As far as dims go, if you can adjust your 8' length to get a better ratio, that will help your modal problems.
My opinion is record as dead as possible and add reverb etc. later and forget about diffusion. I would go with thicker roxul (4" or more) and space off the walls and ceiling the same as the thickness. If you can't afford giving up all that extra space, use the thickest roxul you can monetarily afford and space the roxul as much as you can spatially afford.
This is not to say that you can't use diffusion, but IMHO, trying to get a "natural" sound out of a booth is a fool's errand...I could be wrong.
Thanks for the info! Well that answers that. The booth is what it is already so i can only build in and not out to change the dimensions. I don’t want to shrink the size of the room too much so i was planning on putting 1 inch pieces of wood spaced out across the current wall to put 1 inch space between the wall and the roxul i plan on putting in and then the fabric. Any other suggestions I should try instead? Thanks again!
I'm used to using "small" spaces so I'm a big advocate of dead rooms. I won't try to make spaces bigger than they are (because either I don't know how to OR it just cant be done:) More absorption is better (thicker and % area of coverage) so try to lean in that direction.
Thanks for moving this here Merc. I see Rock has already answered, so thanks to Rock too.
I agree that thick absorption is the way to go. Slats could be useful, but not at the cost of having too little thick absorption. The problem with most diffusers is they diffuse mid and high frequencies but reflect bass. And a nearly cube room like this needs as much thick bass trapping as possible.
Thanks alot guys. So i will go ahead and just do the roxul. Currently there is a monitor in the corner where the wall with the window and the wall “A” meets. So the artist is usually facing that corner. Should I move that monitor to the top middle of wall “A” so the mic is always facing wall A rather than the wall with the window? Sorry for so many questions!
The microphone direction probably doesn't matter a lot because the person speaking or singing is always facing the microphone, and assuming a cardioid mic it will reject what comes from behind. But you're probably correct pointing it at the absorbing wall anyway, just to be sure.
Will you record mainly voices only in that room? That's not the smallest booth I've seen, so good space you have for a booth! I would definitely put some slats on there, on top of that I would (personally) definitely try out some real diffusion.