John Sayers' Recording Studio Design Forum Archive

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 -