Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs - Page 533 - AVS Forum | Home Theater Discussions And Reviews
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post #15961 of 15983 Old Yesterday, 05:14 AM
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Originally Posted by LastButNotLeast View Post
As you've pointed out, the help section built in to REW is pretty good. But people don't know about it/understand it/want to be bothered.
Very often I don't reply because my knee-jerk reaction is "RTFM!"
The help in REW isn't for the newbie. Worse yet, it never seems to help with the task at hand.

@AustinJerry could probably make a small fortune from writing an REW For Dummies book. I'd buy it.

As one of the least expert people here I have no problem in stepping up and saying RTFM.
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You're more polite than I am.

Michael
Markus more polite?

If you really want to see the same questions posted over and over and no one bothering to do the least bit of prep you should watch the acoustical treatment thread for a while. OMG.
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post #15962 of 15983 Old Yesterday, 01:20 PM
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I spent a bit of time calibrating and testing levels, getting mic in right spot, and reading the manual. Im not 100% positive I did everything right, but did want to post some results/graphs to see if anything is horribly wrong. the 1st is my LR and 2 subs with no smoothing and the second is a waterfall of that @450ms and 1/48smooth. I do have audyssey xt32 on and I have my subs eq turned off. phase is 0 on both subs. looking for feedback as to how to read the graphs. I used 90degree calibration file for umik mic and also double checked with radioshak spl meter. my avr was -26.5 and headroom around 13. It seems like so many variables to deal with, almost ready to say fak it. but if these graphs were done close to right, I wonder what recommendations are out there based on the graphs.
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post #15963 of 15983 Old Yesterday, 01:32 PM
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Originally Posted by torii View Post
I spent a bit of time calibrating and testing levels, getting mic in right spot, and reading the manual. Im not 100% positive I did everything right, but did want to post some results/graphs to see if anything is horribly wrong. the 1st is my LR and 2 subs with no smoothing and the second is a waterfall of that @450ms and 1/48smooth. I do have audyssey xt32 on and I have my subs eq turned off. phase is 0 on both subs. looking for feedback as to how to read the graphs. I used 90degree calibration file for umik mic and also double checked with radioshak spl meter. my avr was -26.5 and headroom around 13. It seems like so many variables to deal with, almost ready to say fak it. but if these graphs were done close to right, I wonder what recommendations are out there based on the graphs.
Waterfall looks pretty good. The frequency response curve should actually be smoothed. Try 1/6 smoothing, or the new variable smoothing. Otherwise, the graph is impossible to read.
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post #15964 of 15983 Old Yesterday, 01:43 PM
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here it is 1/6 smoothed and also variable smoothed. appreciate feedback
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Last edited by torii; Yesterday at 02:13 PM. Reason: add graph
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post #15965 of 15983 Old Yesterday, 02:54 PM
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and I have no idea what spectro is suppose to tell me. +600 thru -600
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post #15966 of 15983 Old Yesterday, 04:33 PM
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and I have no idea what spectro is suppose to tell me. +600 thru -600
That's just a different take on the same data as the waterfall. Some prefer it. I think it's a good view.

On it, the thing to watch for are flames extending up above the body of the response.
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post #15967 of 15983 Old Yesterday, 05:41 PM
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Originally Posted by torii View Post
and I have no idea what spectro is suppose to tell me. +600 thru -600
You seem to be throwing measurements at us without demonstrating that you have read the guide WRT how to present graphs. Your first two frequency response graphs show pretty flat in the higher frequencies, but I have o idea what speakers are being measured. And please fix your axis limits. Vertical limits should be 50-100dB, and the horizontal axis limits should be 15-20,000Hz.

The third frequency measurement shows some pretty lumpy response. What is the relationship between this graph and the first two?

And the Spectrogram is a measurement of bass resonance, so it should be restricted to the bass frequencies, 15-300Hz.

Please re-read the guide.
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post #15968 of 15983 Old Yesterday, 06:16 PM
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Originally Posted by AustinJerry View Post

Please re-read the guide.
appreciate all the supposed help, but your guide sucks!

go read the guide, duh your guide isnt for retards like me.

the graphs / jpgs show what speakers are used, 2 subs and the front left/right....the limits are based on the noise floor and top spl, ie 50 and 85....bahh i am done with this mumbo jumbo fake waste of money that dont prove nothing cause of user error.

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Last edited by torii; Yesterday at 06:21 PM.
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post #15969 of 15983 Old Yesterday, 06:44 PM
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duh your guide isnt for retards like me.
If you can't read and follow simple instructions, I agree completely.
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post #15970 of 15983 Unread Today, 05:55 AM
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Originally Posted by torii View Post
appreciate all the supposed help, but your guide sucks!
K, let me get this straight.
You come here asking for advice.
You don't follow any of the guidelines.
You don't understand the guide but you don't say what part.
You insult what has offered as help without any constructive feedback.

Wow! Welcome to my block list and don't let the door hit you on the way out.
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post #15971 of 15983 Unread Today, 06:04 AM
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Originally Posted by torii View Post
user error.
Bingo.
Bye.

Did you really need to quote that entire post in your reply?
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post #15972 of 15983 Unread Today, 07:00 AM
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Quote:
Originally Posted by torii View Post
appreciate all the supposed help, but your guide sucks!
You won’t find a simpler guide to REW anywhere, with more clear, step-by-step instructions. If Jerry's Guide really is too difficult for you to follow, then maybe you and REW aren't meant for each other. OmniMic is much easier to use, albeit less comprehensive than REW, and with OmniMic you can be up and running in 5 minutes. Unlike REW though, it will cost you some money.

Making insulting remarks to one of the most consistently helpful members of the thread isn't going to endear you to anyone around here either.
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post #15973 of 15983 Unread Today, 08:00 AM
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Making insulting remarks to one of the most consistently helpful members of the thread isn't going to endear you to anyone around here either.
true. i pm'd austinjerry with apology. everyone handles frustrations differently. forums are just another way...sorry. i was wrong.

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post #15974 of 15983 Unread Today, 08:14 AM
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true. i pm'd austinjerry with apology. everyone handles frustrations differently. forums are just another way...sorry. i was wrong.
Respect for apologising.
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post #15975 of 15983 Unread Today, 10:40 AM
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So explain why you are stuck on page 56 step 4.a?
I'm stuck because I'm unable to play any test tones using the setup section on my AVR. In the past I've been able to play these test tones. In REW the only thing that I'm able to do is use the SPL meter which works fine, but not able to do anything else. If I go under measure/check levels aren't I supposed to be hearing something? Since I'm not, I'm not sure what to troubleshoot. That's why I'm stuck at that point in the guide.
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post #15976 of 15983 Unread Today, 10:50 AM
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If I go under measure/check levels aren't I supposed to be hearing something?
Yes you should hear something. Can you post details of your signal chain and a screenshot of your REW preferences. This may help people debug it.
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post #15977 of 15983 Unread Today, 11:36 AM
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Yes you should hear something. Can you post details of your signal chain and a screenshot of your REW preferences. This may help people debug it.
Thanks for the reply. Let me know exactly what details you are looking for. I'm running my HDMI from my laptop to the AUX input on the front of my Denon X2000 and then changing the input on the AVR to AUX. What other info would be helpful?
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post #15978 of 15983 Unread Today, 11:38 AM
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Originally Posted by BrutalBodyShots View Post
I'm stuck because I'm unable to play any test tones using the setup section on my AVR. In the past I've been able to play these test tones. In REW the only thing that I'm able to do is use the SPL meter which works fine, but not able to do anything else. If I go under measure/check levels aren't I supposed to be hearing something? Since I'm not, I'm not sure what to troubleshoot. That's why I'm stuck at that point in the guide.
What has me confused is that the speaker level-setting test tones from the AVR have nothing to do with REW. If you can't play the level-setting test tones, something seems to be wrong with your AVR. Does it seem to be working otherwise, I.e. can you play music and hear the audio from movies?
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post #15979 of 15983 Unread Today, 11:42 AM
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Thanks for the reply. Let me know exactly what details you are looking for. I'm running my HDMI from my laptop to the AUX input on the front of my Denon X2000 and then changing the input on the AVR to AUX. What other info would be helpful?
The Preferences screen you attached is configured properly. Please do this:

- Open the REW signal generator
- Select Pink Noise, speaker cal, -20dBFS.
- Click the Play button.

What happens? Any sound? If not, is there an error message? If yes, please take a screen capture and post it here.
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I ran into this also, it was because my hdmi drivers werent selected under my soundcard settings. in addition check the properties setting in rew under asio4all options to ensure your hdmi driver is chosen

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post #15981 of 15983 Unread Today, 12:09 PM
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Originally Posted by AustinJerry View Post
The Preferences screen you attached is configured properly. Please do this:

- Open the REW signal generator
- Select Pink Noise, speaker cal, -20dBFS.
- Click the Play button.

What happens? Any sound? If not, is there an error message? If yes, please take a screen capture and post it here.
No sound when I do this. Yes I get sound when doing everything else (sat box, dvd, etc).

I don't understand why I'm unable to hear test tones from the AVR. I've always been able to hear them and just last week was adjusting them. For whatever reason ever since I started dabbling in this microphone stuff now I'm not able to.
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1/3rd cal files

Guys, please forgive my ignorance, I just got a CSL UMIK and download all the cal files and copied and pasted the sensitivity factor into each file. What is the use for the 1/3rd octave
Frequency response curves at 0°, 45° and 90° angles of incidence. TIA, sorry for the simple question, it's not in Jerry's guide (the only thing that isn't)...

Cheers Jeff
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Guys, please forgive my ignorance, I just got a CSL UMIK and download all the cal files and copied and pasted the sensitivity factor into each file. What is the use for the 1/3rd octave
Frequency response curves at 0°, 45° and 90° angles of incidence. TIA, sorry for the simple question, it's not in Jerry's guide (the only thing that isn't)...

Cheers Jeff
What is in the guide is the instruction to use the full-spectrum 90 degree calibration file when doing the typical REW measurement (with the mic pointed at the ceiling). You can use the zero degree calibration file if you are doing near-field measurements with the mic pointed directly at the speaker. It has also been demonstrated that the difference between the two cal files is quite small, and limited to the higher frequencies above ~10Khz.
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