Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs - Page 391 - AVS Forum
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post #11701 of 11717 Old 09-21-2014, 10:33 AM
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Originally Posted by jjazdk View Post
The cal file is irrelevant since I am looking for the relative difference between 0 and 90 degrees.
What is interesting is how much the room contributes compared to the direct sound from the speakers.
What I meant was that I used the same cal file for both orientations, and therefore the difference I saw was accurate. If I had used a different cal file for each, then they would not. That is the relevance.


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post #11702 of 11717 Old 09-21-2014, 11:06 AM
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Originally Posted by jjazdk View Post
The cal file is irrelevant since I am looking for the relative difference between 0 and 90 degrees.
What is interesting is how much the room contributes compared to the direct sound from the speakers.
Is there a question there? Did you look at the analysis here: Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs

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post #11703 of 11717 Old Yesterday, 11:22 AM
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Asio set up issue

Jerry,
Thanks for the excellent guide. I am brand new to this REW thing, very cool by the way.
Asio is not outputting a generator signal, I have tried the trouble shooting tips in the quide. Have any other tricks I could try?
A Java set up works for me, I'm not smart enough to change speakers with it though.
Could you recommend any links / posts. I apologise in advance for any thing stupid or easy I missing.
US newby's gotta get annoying busting into some very interesting discussion on this form.

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post #11704 of 11717 Old Yesterday, 12:18 PM
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Hi Marv, thanks for the kind words. Regarding getting a stubborn ASIO driver to work properly, I don't have any suggestions other than what is in the Guide. Uninstall, re-install, re-boot, pray to the Gods. It is beta software, with little or no support. What is your laptop configuration--HDMI? Windows, and what version?

If the Java driver works, then you can be completely functional. The Guide explains how to select the left, right, left+right, and center speakers by simply altering the Y-cable connection to the AVR. Give it a try, and don't be reluctant to ask questions here.

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post #11705 of 11717 Old Yesterday, 01:05 PM
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Originally Posted by AustinJerry View Post
Hi Marv, thanks for the kind words. Regarding getting a stubborn ASIO driver to work properly, I don't have any suggestions other than what is in the Guide. Uninstall, re-install, re-boot, pray to the Gods. It is beta software, with little or no support. What is your laptop configuration--HDMI? Windows, and what version?

If the Java driver works, then you can be completely functional. The Guide explains how to select the left, right, left+right, and center speakers by simply altering the Y-cable connection to the AVR. Give it a try, and don't be reluctant to ask questions here.

HI Jerry,
I will do the re install ADIO thing next.
I am using a windows 7 and HDMI connection. Is it possible to run Java on an HDMI set up?
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post #11706 of 11717 Old Yesterday, 01:17 PM
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No, with the Java driver, you would use a 3.5mm stereo cable from the headphone output Jack into the front-panel AUX IN RCA jacks on the AVR. It is explained in the Guide.

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post #11707 of 11717 Old Yesterday, 02:09 PM
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Originally Posted by AustinJerry View Post
No, with the Java driver, you would use a 3.5mm stereo cable from the headphone output Jack into the front-panel AUX IN RCA jacks on the AVR. It is explained in the Guide.

Thanks Jerry, pretty much what I thought. Back to the drawing board then.
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post #11708 of 11717 Old Yesterday, 03:24 PM
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Semi-quick question for the REW experts:

I notice from reading on the mini-DSP site that REW has the ability to output an automatic equalization for the sub. Since I have a Yamaha receiver with an admittedly limited PEQ, could I not use the suggested adjustments made by REW to manually adjust my subwoofer EQ? Obviously I won't be able to export the settings and import them into the Yamaha PEQ, but I'm thinking I should be able to note the suggested settings and make them manually in the PEQ.

Thoughts?

Mike
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post #11709 of 11717 Old Yesterday, 03:39 PM
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Quote:
Originally Posted by mjmcmahon67 View Post
Semi-quick question for the REW experts:

I notice from reading on the mini-DSP site that REW has the ability to output an automatic equalization for the sub. Since I have a Yamaha receiver with an admittedly limited PEQ, could I not use the suggested adjustments made by REW to manually adjust my subwoofer EQ? Obviously I won't be able to export the settings and import them into the Yamaha PEQ, but I'm thinking I should be able to note the suggested settings and make them manually in the PEQ.

Thoughts?

Mike
Yes you can. Just use the generic EQ setting in REW. That what I do with the XMC-1 which has a robust PEQ.
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post #11710 of 11717 Old Yesterday, 03:45 PM
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Yes you can. Just use the generic EQ setting in REW. That what I do with the XMC-1 which has a robust PEQ.
Many thanks Bluescale!
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post #11711 of 11717 Old Yesterday, 04:55 PM
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Quote:
Originally Posted by mjmcmahon67 View Post
Semi-quick question for the REW experts:

I notice from reading on the mini-DSP site that REW has the ability to output an automatic equalization for the sub. Since I have a Yamaha receiver with an admittedly limited PEQ, could I not use the suggested adjustments made by REW to manually adjust my subwoofer EQ? Obviously I won't be able to export the settings and import them into the Yamaha PEQ, but I'm thinking I should be able to note the suggested settings and make them manually in the PEQ.

Thoughts?

Mike
I purchased a MiniDSP to experiment with the REW automated EQ capability. It actually works quite well, and is easy to learn. I encourage you to try it. If you are using REW to measure your system, we would be interested in seeing your before and after measurements here. Good luck!

Edit: I also use Audyssey XT32 to calibrate my four subs. After quite a bit of experimentation, I decided the best approach for using the MiniDSP was to apply correction after Audyssey, rather than before it. So, I took my post-calibration bass measurements and fed them to the REW EQ tool, and REW said no filters were created, i.e. no additional correction was required! That made me feel good, and I now have a MiniDSP sitting unused on the shelf.

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post #11712 of 11717 Old Yesterday, 09:39 PM
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Quote:
Originally Posted by AustinJerry View Post
I purchased a MiniDSP to experiment with the REW automated EQ capability. It actually works quite well, and is easy to learn. I encourage you to try it. If you are using REW to measure your system, we would be interested in seeing your before and after measurements here. Good luck!

Edit: I also use Audyssey XT32 to calibrate my four subs. After quite a bit of experimentation, I decided the best approach for using the MiniDSP was to apply correction after Audyssey, rather than before it. So, I took my post-calibration bass measurements and fed them to the REW EQ tool, and REW said no filters were created, i.e. no additional correction was required! That made me feel good, and I now have a MiniDSP sitting unused on the shelf.

Thanks AustinJerry!

I've currently got just one sub and my response is pretty good as-is. I took the leap and ordered a UMIK from Power Sound Audio tonight and will have it Friday. I'll run YPAO on Friday and then dive into REW. I'll post before and after pics of response curves (YPAO PEQ) once I'm done. I considered mini-DSP, but I don't think it's likely needed for a single sub.
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post #11713 of 11717 Old Today, 04:41 AM
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My apology. When I quickly read your original post, I mistakenly concluded that you had purchased a MiniDSP. Whether you can manually load the corrections into your sub, I don't know, but it is certainly worth a try. If it doesn't work, the MiniDSP is a relatively inexpensive device, and works quite well.

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post #11714 of 11717 Old Today, 07:49 AM
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Quote:
Originally Posted by AustinJerry View Post
My apology. When I quickly read your original post, I mistakenly concluded that you had purchased a MiniDSP. Whether you can manually load the corrections into your sub, I don't know, but it is certainly worth a try. If it doesn't work, the MiniDSP is a relatively inexpensive device, and works quite well.
AustinJerry -

Thankfully, the Yamaha receiver's PEQ does allow quite a bit of flexibility for customization, albeit only down to 31Hz and with 4 adjustments for the sub. I've got it sounding pretty good at this point, but I'm looking forward to seeing what I can do with REW! If I get frustrated by Yamaha's limitations, I may want to talk to you about buying the mini-DSP.

Mike
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post #11715 of 11717 Old Today, 07:50 AM
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Hi guys a little help needed...measurements are taken with audyssey mic...is it wort keeping both the sb13ultra and sb12NSD or just the sb13ultra? I have taken a picture of both measurements...the purple measurement is just the ultra in my room calibrated by audyssey and sub is set 5db hot (just audyssey no dyn EQ), the blue one are both combined but i have put the distance of the sb13ultra to 1,88m (from 4,38) and put PEQ on ultra on -8db at 35hz freq...that was the best i could get on both subs...if i leave it at audyssey there is a big null at 23-30 hz and around 75hz...so question is would you guys have both subs or just an ultra (my room is around 1600 cubic feet)? the gain of leaving them both seems reasonable or is it? thanks for helping me out
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post #11716 of 11717 Old Today, 08:18 AM
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With the exception of that narrow issue at 70-75Hz, the SB13Ultra by itself seems to produce the smoothest response. May we assume you have experimented with a number of different positions and what you are showing is the best you could achieve?

Edit: The deep dip at 70 Hz is so narrow it is likely not audible. The peak just to the right shows up on both measurements, so regardless of which configuration you choose, you should try to resolve that issue.

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post #11717 of 11717 Old Today, 09:32 AM
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Quote:
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With the exception of that narrow issue at 70-75Hz, the SB13Ultra by itself seems to produce the smoothest response. May we assume you have experimented with a number of different positions and what you are showing is the best you could achieve?

Edit: The deep dip at 70 Hz is so narrow it is likely not audible. The peak just to the right shows up on both measurements, so regardless of which configuration you choose, you should try to resolve that issue.
I dont have many position options...they are both at front (sb13ultra on the right side and sb12nsd on the left)...at SVS they told me that the drivers of both have different phase response so i can expect some nuls so that is why i have those two big dips if i leave it at audyssey calibration (that is also why i have to lower the sb13ultra level for -8 db at 35 hz, so that the sb12 gained in level and the dip came up)...and yes this is the best i could get from both of them...i am on the fence...my brother would like to get the 2nd sb12 from me but i just aint sure because if i look at the gains when both are playing they are pretty big especially in the lowest freq...oh man...cant decide what to do...but those dips playing both arent that awful are they? I would not buy a 2nd ultra at least for now because it is too expensive here in europe so what to do?
And i cant get those levels at 70-80 hz up no mather what i do...even the peq2 on ultra doesent help neither plus neither minus levels, have tried so many things but it just stays there...it is just worse...

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