Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs - Page 496 - AVS | Home Theater Discussions And Reviews
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post #14851 of 14852 Old Today, 01:50 PM
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Quote:
Originally Posted by gh32 View Post
I have this issue also, but with the UMM-6 USB mic. My AC, refrigerator, and dvr all off. My noise floor seems to be around 60-62db. Interested to see what your issue might be.
With my UMIK-1 my noise floor was reading in the low 60s which surprised me. Then I noticed my AC was running. Once I shut that off it was in the mid 40s give or take. And that is with the relatively loud set top box.

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Originally Posted by AustinJerry View Post

The frequency response seems to drop off the shelf above 8Khz. What is going on with your high frequencies? Are you applying EQ up there? The average level of the signal above 100Hz is 65-70dB. The curve rises to 90dB at 20Hz. I have heard of house curves, but this seems to be quite heavy in the bass. Surprisingly, the waterfall shows pretty good control of the bass resonance--what bass treatments are you using? With the aggressive bass boost, I expected more ringing, but the absence of ringing suggests that the bass probably sounds pretty tight.
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Originally Posted by JohnPM View Post
Measurement file indicates it was made with an RS meter, should ignore everything above a few kHz. Also seems to be clipping somewhere in the measurement chain causing very high odd order harmonic distortion (meter range set too low, perhaps).
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Originally Posted by markus767 View Post
^
I would suggest to wait for your UMIK-1 to arrive. There's just too much room for error with the Radio Shack SPL meter.
Thanks guys. My UMIK-1 came last night. I was glad to see that the high frequencies did not roll off at all like what was measured when I used the RS meter. So while the RS meter did a decent job reading the high end from near field, it was way low when reading it from 16 ft. across the room at the MLP. Good call to ignore it and wait for the UMIK-1.

As Jerry pointed out, I have an issue with the sub running way to hot. I'm not sure when this happened. Its been years since I last calibrated with REW and my BFD. And I know when I finished with that it was all dialed in nicely. Now it is obvious that something changed. The gain knob on the sub is in a place where it would be really hard for someone to have turned it or bumped into it, so not sure how it got this way.

Anyway this weekend I'm going to redo the EQ. I'll use YPAO to start with and let it do its thing. Then I'll EQ the sub. Hopefully REW will do all the heavy lifting as far as its recommended filters. I'll post an updated set of measures once completed.
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post #14852 of 14852 Old Today, 02:19 PM
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I'd do the sub first, then YPAO. It works better for me that way with MCACC, which also doesn't eq subs, but will set the level and distance.

Did you really need to quote that entire post in your reply?
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