Control Room Surface

That's awesome...this is a combination letter of appeciation and suicide note.... thanx FU*%! But as you look at the damn drawing of just the resonator it goes from left to right and we all know that corresponds to front and back respectively... One thing about building a studio is.....it's not worth anything if you don't do it twice... Cheers.. TIK

Hey so also I am thinking two panel traps on the ceiling and hangers...whadya thinK? Thanx again TIK

And Bro one final question... Does it really make a difference? Look at the fact that the forty-five degree corner resonators are at the same angle of attack!!! Huh Huh Hmm?? LOL Thanx man for your time... TIK

Panel traps would be fine around the edges of the room, but overhead (mix room and often live rooms too) you'd want broadband absorption - the so-called "cloud" of rigid fiberglass or rockwool - As to the "same angle" corner traps - if you mean the rear pair, they would end up probably far enough away from the mix position so as to return a diffused enough sound field to maintain a more live sound field but at the same time redirect enough of the speaker sound field NOT to cause problems with early reflections - Keep in mind that ANY square corner will return sound exactly parallel to the incident path - this makes for a pretty short sound path from your head to the rear and back, and can cause smearing of the stereo sound field if it's shorter than about 20 feet round trip - using slat resonators in those rear corners would cut down a lot of the reflections back to the mix position without deadening the room too much - also, if the slots are not too narrow between slats, you would get a certain amount of diffusion off the interruptions between slats. For this reason I wouldn't make those rear units with too small a gaps (slots), even though it will raise the operating frequency. The side wall slats are much closer to the mix posiition, and are there to redirect early reflections AWAY from the mix position while solving flutter echo problems caused by parallel walls - you want them to redirect sound to the REAR of the room, where it will mainly be absorbed by the rear wall trap and NOT be bouncing around in the front area where you're trying for a coherent sound field. Sorry 'bout the suicide thing - I usually prefer "Death by Chocolate" - (It's an un-beLIEVably chocolaty Ice Cream, if you've not tried it) the stuff can almost make ya forget you just hit your barre chord finger with a hammer... Steve

Keep in mind that ANY square corner will return sound exactly parallel to the incident path

I thought you had to have a tri-corner to guarantee that -- like those little radar reflectors on sail boats.

Shoulda specified perpendicularity to both walls of the corner, sorry... Naturally if you fire from the floor, into a corner 3' off the floor, the sound will hit a few more (dozen) surfaces before returning :?

So, Just thought I would post the corrected resonator/er and a poly frame that I stuck on the ceiling....hmm any thougths? also the sofa stage showing my airvents and cable trough...also put the fabric up in the front and back. The front has acoustic rigid fiberglass below the window where the sub will go and two meters up both sides of the window where the monitors will be...didn't get a photo :cry: because a friend stopped by and so I had him hold one end of it....the cloth :wink: Thanx Steve so much for pointing out that I screwed the pooch but I am up and rocking soon!

Also, Can you use rigid fiberglass all by itself for a cloud? I did a search on the forum before I posted...

Just in case any one is keeping track...RESONATERS REALLY WORK! It is awesome when you get your walls done and fire up a cheap stereo and hear everything that is going on that you never heard before, plus putting your ear up to the side of the resonator for the first time is a really great experience! So built something close to two more along the back wall and have about two more days of construction...

"Can you use rigid fiberglass all by itself for a cloud?" - Sure, it's just a little trickier to fasten without sagging - one way is to use 2 inch fender washers (the big washers with small holes in them) and thread stiff wire through the fiberglass (near all corners, and about every 2 feet) - bend a "tee" into the wire after the fender washer is in place, so that the fender washer won't allow the wire to pull through. How you fasten these into the ceiling depends on your ceiling construction - it's best if you can go into the framing behind the ceiling wallboards. Once the wires and fender washers are in place, you can cover the front and sides (wrapped around to the back side) with cloth and glue in place. Once the glue is dry, they can be hung in place - one way is to use small plant hanger hooks, which usually come with both toggle bolts and screw threads... Steve

Thank you, But if you can see those boards sticking out above my window, I am just going to set the rigid up there right above my mixer. My room sounds really terrific so I will wait til the pro comes over with the spectrum analyzer on the 19th to see where I am at freq wise....I know where I am at freak wise :wink:

Sure, that would work fine; didn't notice them first time around (the "eagle eye" that spotted your backward slats musta had too many 12-hour graveyards - gotta find a "real" job one of these days) Good plan on the measurement thing - acoustics and carpentry, same idea - measure twice, cut once... Steve

Sorry if anyone is offended by this picture showing sweet Michelle here without her clothes on but I had to post it! Handmade in Germany Baby!

Success!! A friend came by yesterday and measured the control room. BAM! I had a really flat freq response! There was a dip at 160Hz and I think it is because of the bass trap right over the listening position. This could work out really well since when the room is finished I will be using an Adam Sub 1... We conducted the test on Genelec 1031A's and used a spectrum analyzer, the mic that looks like a medical probe and a whole rack of gear and some computer program my bro had. The frequency results were slightly different between the computer and the hardware unit but the wave looked the same on the laptop and the analyzer.... We obviously moved the speakers around as well as the mic and stood on one foot etc... There was also a very minimal valley from about 3500 to 5000Hz but my friend doing the test thinks this may be a characteristic of the Genelecs... Anyway, I am now waiting for the console desk to be built and then I will take the S-3A's out of the boxes and slap EVA the the effects rack in there and we will test the room again... So if you are reading this forum and have any doubts about knightfly's ability....well....this dumb ass (me) read F. Alton's book, got help from knightfly, friends, tools and a little luck and insanity....and the results are a freq response that looks like a heart monitor of a patient that is not going to make it! (meaning pretty flat) plus the room sounds terrific as well... Thanx KF I will post the finished pic... TIK