small two story studio build (Germany)

[mikahanau]

looks like i can drink my Öttinger in your studio soon ;-)
cheers
Mika

[zijon]

Originally Posted by mikahanau

looks like i can drink my Öttinger in your studio soon ;-)
cheers
Mika

shuddup about the beer already :D
when you announce you are coming for a visit better ad a list of preferred breweries

[Yeah, right...]

Originally Posted by mikahanau

looks like i can drink my Öttinger in your studio soon ;-)
cheers
Mika

Öttinger?

Yes, I tried it ONCE!

Funnily enough, on a recent trip to Australia I was surprised to see Öttinger marketed as "Germany's No 1 selling brand" (See HERE) but then again, I guess to get it all in perspective, you must first try a few Australian beers...?

Prost! Mike

[zijon]

insulation work almost done! tomorrow I meet up with the concrete guy. let's hope I didn't screw up anything yet

Stupidly I had to run one cable straight across the live room. Maxed out the length of USB the way it is. There it goes into a signal repeater and then to the control room. I built a little tool to cut the right amount of styrofoam to fit the cable.

[zijon]

insulation is done, tomorrow i'll put in the dividers between the rooms, the styrofoam strips around the walls and level out some areas. next thursday concrete man is coming to do the final measurements and saturday we pump it in! 9 tons plus water
before that i still have to put down the final layer of insulation and the heating. hope all goes well

[zijon]

yup, did what i said i would

[erikdrink]

Super!

[MidasHatesGold]

looks great...but I would suggest using a foil....otherwise water will run down the cavities and steep your insulation underneath...make sure to ventilate the room after pouring because the gypsum will absorb humidity...

hopefully till end of this week....

[zijon]

Originally Posted by MidasHatesGold

looks great...but I would suggest using a foil....otherwise water will run down the cavities and steep your insulation underneath...make sure to ventilate the room after pouring because the gypsum will absorb humidity...

hopefully till end of this week....

I am still going to ad another layer of insulation. 20mm with a layer of foil. this will be taped to the sides and sealed off completely.
also i am going to install two dehumidifiers in the room during the drying process. humidity is the reason i still haven't caulked the last layer of gypsum.
hope to hear from you!

[zijon]

had a telephone marathon today. everything is ordered and set for the final prepwork thursday and friday.
never thought the flooring would be so expensive. cost me about 6000 in materials. and that's pretty much only for cement, insulation and pipes

[tallpaul]

Originally Posted by zijon

had a telephone marathon today. everything is ordered and set for the final prepwork thursday and friday.
never thought the flooring would be so expensive. cost me about 6000 in materials. and that's pretty much only for cement, insulation and pipes

whats hidden is expensive. always the way. not the place to be cutting corners, though.

[MidasHatesGold]

Originally Posted by zijon

had a telephone marathon today. everything is ordered and set for the final prepwork thursday and friday.
never thought the flooring would be so expensive. cost me about 6000 in materials. and that's pretty much only for cement, insulation and pipes

wow ...I had like 6 tons cement....and 70 sqm 50mm insulation + foils and paid around 2000...

expensive south that is

[zijon]

Originally Posted by MidasHatesGold

wow ...I had like 6 tons cement....and 70 sqm 50mm insulation + foils and paid around 2000...

expensive south that is

I've got 11 tons of pourable cement (Fließestrich),
60m² of
40mm Rockwool, 80mm Polystyrene, 20mm foilcovered polystyrene
and 450m of heating pipes for the floor heating, plus all the paraphernalia.
I think i'm off okay. (sorry folks for all that metric-system-info, but get used to it, it really DOES work )
just got my quote for the machinery and the workers...another 600$ for the day.
i'm approaching "burnt out" status...

[zijon]

Insulation finished, installed the heating pipes (4 seperate circuits) and poured the concrete. the supplier that did the calculations must have made a few mistakes, i am now stuck with 5+ tons of cement. financially speaking that is a great thing though. 800€ saved

sadly i left the camera at the studio. pix will follow next week.

[zijon]

So here are the pix i promised last week!

[zijon]

this weekend I installed the temporary heating system to dry the cement, so when i actually start using the floor heating it doesn't crack. The floor is solid enough to walk around on it already, but for the next weeks its gonna be around 35°C in there with 90% humidity. The dehumidifiers are extracting a good deal of water already but there is still plenty left
So all I can do is order the wood for the second story flooring and the first ceiling clouds. With the cement in there reverb time is insane!

[zijon]

not much happening right now as the floor is drying. I started getting in to the math of qrd's.


I did find a paper named bbc research department report from way back in 1990. It seems to approach the math from a slightly different angle then in the book I am currently using, but does not answer the following.
I wish to construct a 2-dimensional QRD (like a Skyline), although not with the same number of colums as rows. One way that these are (or at least were back then) constructed is by taking two modulo series as vectors (one a column and one a row) and multiplying the elements to get a p1 x p2 matrix with p being the respective prime number. Another (mostly used for primitive root diffusers) is to take p-1 and dividing it into two numbers that give the dimension of the matrix. the elements are then set starting with the first diagonal and working from there.
I wish to create a diffuser in the neighborhood of p1=71 horizontally and p2=11 vertically. This is generally possible with both construction methods.

here's a question to the more experienced acousticians out there:
i am aware that this construction provides me with a far better dffusion in one direction than the other. This is less of interest to me than the fact that I would reduce repetition of patterns on the horizontal level, providing a smoother diffusion. I don't know if this makes more sense than to just create square diffusers and rotate them by 90° compared to their neighbors.
Can you think of any flaws in my thinking? Does my strategy make more sense? Or should I go for p1=p2 and rotate them?

I really really hope my post makes sense to you guys

[MidasHatesGold]

Merry x-mas

[zijon]

Originally Posted by MidasHatesGold

Merry x-mas

to you too!

[zijon]

Happy new year!
I just found a few old pix showing how I mounted the ceilings in the drumroom and vocal booth on hangers. The best ones I found are manufactured by "Schwingmetall". Great specs, have a secure bolt in case the rubber wears and a resonant frequency of 12hz or so (I can't remember the exact numbers, it's been a while).