About golden ratios...

[Glenn Kuras]

First, when we refer to "Golden Ratios", am I right to presume that we are referring to the internal dimensions of a room BEFORE any acoustic treatment?

Yes

Secondly, chances are that the ceiling height will ceiling height will be somewhat fixed. However, within certain parameters, I'll have some flexibility as to length and width. So, working from one known measurement, might I be able to get some help on here to calculate the optimum size for the other two axis?

Yes but generally speaking you want to make the room as large as possible. What area do you have to work with?

[boggy]

so called "golden" ratios (there are many of them through history!) have some sense if you build your studio from scratch. If you adapt existing (small) room for audio production, it is better (cheaper, more effective) to use space for absorptive acoustic treatment than for decreasing existing dimensions which must be done with something heavy, (bricks, concrete, etc...) gypsum boards, OSB, etc... are transparent for low frequencies, so they cannot change existing room modes.

[Dayo]

Thanks for the reply both.

In a sense I am building from scratch since the plan is to use a garden shed.

Well, not a shed as such, but a prefabricated outdoor building. Quite a number of companies supply them in the UK.

They come in bespoke sizes up to 7m square, can be made pretty soundproof too. The only measurement that is fixed is the height.

It's early stages yet, but I'm hoping to get some help on here when things get moving next year.

Lovely website Boggy BTW

[Dange]

Originally Posted by Dayo

They come in bespoke sizes up to 7m square

Is this meaning 7m x 7m? Not 7m sq floor area, that would be tiny?

Also for the theory on Golden Ratios to work don't you have to have your loudspeakers in a place that drives ALL modes equally?

[jinksdingo]

If it is clad in sheet metal, it'll take some works to get it sound proof.

Or if you have neighbours not too close you could treat it acoustically only and let the bass roll on thru and in essence not be plagued with internal nodes in the sub region.

To soundproof you essentially are containing the bass and then will need to absorb it.

Much easier to just treat the internals with 2' rockwool lined with isolated plasterboard then some mid and high absorbers on the walls and ceiling and a diffuser or two.
Otherwise it'll be 4' or more rockwool lined with thick ply, glue and plaster.
And then bass traps and diffusers.

[Dayo]

Hi all

OP here.

The garden shed has been kicked into touch. We're about to buy a house with a double garage and the aim now is to convert that. We've got about 26 sq metres to play with and the biggest dilemma is going to be booth vs no booth.