Angled Walls - Not Parallel

Hi there. Can anyone explain why the walls of the different rooms are not paralell in John`s studio plans? For example in John`s Corner Control Room Layout: the distance CR - Studio B in the rear of the CR is greater than in the front. Isn`t it a waste of space? I see no disadvantage if the wall in Studio B would be as angled as in the CR. :?: Cheers, chris

Hi Chris, and welcome to the forum! :) John wrote the Recording Manual many, many years ago. The science of acoustics is not stationary, and understanding of sound has changed and improved over the years. Some things that John used to do, he no longer does for that very reason: what used to be "understood" has now turned out to not be necessary. When someone else asked the same question a few years ago, here's what John himself replied: viewtopic.php?f=1&t=14215&start=4 So those doors (and the walls they are int) don't need to be angled: they can be parallel if you want them to be. The only issue is that the gap needs to be large enough to provide the level of isolation that you want, but there's no acoustical need to angle them. The same applies to tilting glass in windows: there's no acoustical need to do that either. - Stuart -

Hi Stuart, thanks a lot :) John's idea with the plasterboard and the glued insulation on the backside of the studs is great! But how are these walls mounted? Is it right that the walls are completely assembled before the installation? I'm thinking about the weight... aren't these wall`s to heavy to move? Chris

I guess you are asking about "inside-out walls"? Yes, those are built lying flat on the floor, then lifted into place with a wall jack, or a lot of strong arms. You also need to have several braces in place to prevent the wall from falling back again, if something goes wrong. And yes, they are REALLY heavy! But you don't have to raise the entire wall at once: You can build it in shorter sections, raise them one at a time, then caulk the joint carefully and bolt/screw/nail them together. - Stuart -

Yeah, "Inside out Walls" was the right headword :idea: THX :) Chris