John Sayers' Recording Studio Design Forum Archive

HI i am kinda new to this acoustic treatment of rooms and such so bare with me... i have a room that is 4 meters long 3,5 meter wide and 2 meters from roof to floor.... sorry i use the term of meters but i'm swedish...anyway i put some glass fiber on the walls in front of the mixing table and on the sides, but behind me i have a wood wall and are planning to cover it with some kind of fabric...but when i try out my speakers the sound is to strong in the middle range. what kind of material should i use to get the middle frequences to shut up!! ?

sorry about the oversized pic hehe

He, Perra, and welcome to the board -

I resized your pic; doing that also forces everyone to scroll sideways to read the text. If you're on a Windows machine, a simple trip to the Paint program can fix that; we need you to keep pix down to 800 pixels wide, preferably a bit smaller, and white space only makes the pic harder to manage without any extra info...

Now, is that a REALISTIC view of your room? Are your speakers really flush-mounted into FLAT walls instead of the angled portions, etc? And, what KIND of fiberglass did you use, was it spaced off the walls or not, framed or not, density, covering, any other DETAILS that may help with the discussion -

Also, please edit your profile to include a location; it's much easier when suggesting things NOT to have to scroll back to the beginning post to see what area of the world you live in. Thanks... Steve

ok i will keep that in mind.. the speakers are not done like that they are facing me from the sides in head level ,and the fiberglass has a layer of some kind of paper thin fiber material... and it is approximatly 7 cm thick and are nailed to the wall not framed, the roof has no kind of acoustic fixup just painted...the problem is i don't want the room to dead silent..but i fear that it will be that if i put fiberglass up there too.the thing is that when i clap my hands i hear a fast reflection sound followed by a kind of tone and i would guess the sound is reflecting on the roof and corners.and it makes the acoustic very bad...the back wall has no fiberglass on it just wood..

Can you do a more accurate drawing of what's really there, showing locations of speakers, your head, and all acoustic treatments so far?

Remember, what you would LIKE it to be isn't what affects your sound, it's what it REALLY is... Steve

BTW, if you have flutter echo then you need to kill it. ANY pair of parallel surfaces will cause flutter, so this needs to be "broken up", either through adding non-parallel surfaces on ONE of the two parallel surfaces, or by absorption, or a combination.