Rehearsal Space in Katy Texas

Thanks Stuart for the praise, encouragement, and help. You can certainly move it to the completed studios, but I will probably never say it is "finished". I still need to do the REW measurements, get the treatments correct, build the stage boxes for the wire I pulled through the conduit. Just fiddling around with it now. But yes, it is being used for sure. Erik

I finally got the audio interface (focusrite scarlette 18i8), set everything up, emptied the room except for 2 1/2 corner bass traps already built, calibrated the equipment, and took some measurements using Room EQ Wizard software, RadioShack digital sound level meter, interface, and one powered speaker. First, here is the layout and some photos of the (almost) empty room. Erik

While calibrating the sound card, I could not get the clipping error to go away whenever I set the input and output levels close to the same, no matter what I tried. I set the output level about 6 dB below the input level and the headroom worked out and I was able to take measurements. Does this soundcard measurement look right? Erik

Here is the waterfall plot from the measurement of the (almost) empty room. I can only guess that the issues in the low frequencies mean I will need more than 3 corner traps and should add some at the wall to ceiling corners as well and the issues in the higher frequencies may be due to a parallel reflective ceiling and floor. I will try adding ceiling clouds next with a hard back surface and hung at a 12 degree angle to see if that makes a difference. I am just guessing wildly here. Erik

the .mdat file can be downloaded here: http://syfsr.com/?s=d7981da4-3e02-4c10- ... e94738d8b8 I went ahead and put the 8 broadband absorber panels back up on the walls and re-tested as well. That did not seem to make much of a difference at all.

I just noticed this again now, when I was searching for something else... Did you ever get the problem solved with your REW calibration? Clearly there's something badly wrong with how you have things set up, which is why you are getting that comb-filtering on your calibration: You seem to have some form of feedback loop going on, which is why your data is not valid. If you have fixed that, then please post your new measurements. - Stuart -

Well I messed that up. I was building treatments and taking measurements along the way and and it was not making much sense. You pointed out the obvious to me. I calibrated the sound card again and got a flatter, more normal looking response. I took another measurement of the room with the treatments in place. I now have 3 corner bass traps in wall corners, 1 corner trap in a wall to ceiling corner, and 2 ceiling clouds hung at 12 degree angles to the ceiling with hard plywood backing in place. Here is the measurement now. It is sounding pretty good in there to me, but I am a novice. Erik

The data looks valid now, but the response doesn't look so good. It looks sort of like the "smiley face" often seen on audiophile graphic equalizers! I suspect you need more bass trapping. Please post the actual MDAT file, so we can take a look at that... - Stuart -

Thanks Stuart. I can do more bass trapping. The mdat file can be downloaded here: http://syfsr.com/?s=55dfcb3a-4a71-4327- ... 782b9fb5e7 Erik

I tried to download your MDAT file, but that link says there is nothing there... Can you upload it again? - Stuart -