Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs - Page 724 - AVS Forum | Home Theater Discussions And Reviews
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post #21691 of 21705 Unread Yesterday, 07:28 AM
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An issue I ran into was having my Sony TV connected to the AVR. My comnputer kept switching between recognizing the AVR and TV. Caused my laptop serious fits, so I had to unplug the TV HDMI. Made switching between YPAO modes quite difficult.

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post #21692 of 21705 Unread Yesterday, 08:10 AM
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Quote:
Originally Posted by Alan P View Post
I'd say your graph looks fantastic, and especially so since you are just starting out. Many on this forum would probably kill to be able to start with a frequency response like yours.

That dip at 80hz is very, very narrow. It is almost certainly not audible during actual content.

That being said, it would still drive me crazy.

Can you move your CC forward or backward a few inches (I mean physically move the speaker) to see if it makes any difference?
Thanks Alan! I'm starting to really get the hang of how to measure but the interpreting and fully understanding the graphs is where I am at now.

Yes, I'm rather anal so getting it flat as possible is my goal...That's why I went dual!

Right now, the front of my CC is just past the edge of the shelf it's on but I can play around with it's position. I have about an inch I can pull it out and several backwards but I think I want to avoid moving it back. I will try both though.

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Originally Posted by Alan P View Post
IIRC, you bought dual subs, right? If so, are they placed so that they are equidistant to the MLP? If they are not, yes, adjusting phase on one of the subs (the closer sub) should produce some good results. If they are equidistant to the MLP, then adjusting phase shouldn't do much, but it doesn't hurt to experiment and measure.

BTW, XT does have subwoofer EQ...just not as detailed as XT32.
I did go dual...the near one is about 2 feet closer. I will experiment and see what I can come up with.

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Originally Posted by LastButNotLeast View Post
This is a great technique using REWs generator and SPL meter:
At What Point Do I "Play" With The 0/180 Phase Switch On Dayton 1500 SUB?
Michael
Thank you Michael! I will definitely give this a try!

I may not get to measure again until the weekend but I will certainly report back with a new graph as soon as I have one. Thanks for the help guys!

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post #21693 of 21705 Unread Yesterday, 08:36 AM
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Markus,

Bands capable of adjustment:

Speakers
62.5 Hz -- 157.5 Hz -- 396.9 Hz -- 1Khz -- 2.52 Khz -- 6.35 Khz -- 16 Khz

Subwoofer
15.6 Hz -- 19.7 Hz -- 24.8 Hz -- 31.3 Hz -- 62.5 Hz -- 125 Hz -- 250 Hz

Q factor: 0.5 - 10.8
Gain: -20 db to +6 dB

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post #21694 of 21705 Unread Yesterday, 08:41 AM
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Quote:
Originally Posted by Hammonje View Post
Is there any information that shows the speaker assignments? I am running 5.1, but the software shows 1.1 thru 1.8. I thought it was the subwoofer, but hell at this point I'm just stoked to produce a graph.
1 ...8 = L R C LFE LS RS LBS RBS
Should be in Jerry's guide, no?
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post #21695 of 21705 Unread Yesterday, 08:49 AM
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Quote:
Originally Posted by Hammonje View Post
Markus,

Bands capable of adjustment:

Speakers
62.5 Hz -- 157.5 Hz -- 396.9 Hz -- 1Khz -- 2.52 Khz -- 6.35 Khz -- 16 Khz

Subwoofer
15.6 Hz -- 19.7 Hz -- 24.8 Hz -- 31.3 Hz -- 62.5 Hz -- 125 Hz -- 250 Hz

Q factor: 0.5 - 10.8
Gain: -20 db to +6 dB
Thanks. Now do the 3 measurements outlined in post 21674. For now measure through channel 4 (LFE). In your AVR set the LFE low pass filter to off or the highest value possible. Don't forget to use an acoustic timing reference.
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post #21696 of 21705 Unread Yesterday, 08:57 AM
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Thanks. Will do tonight and report results.

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post #21697 of 21705 Unread Yesterday, 09:43 AM
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Quote:
Originally Posted by unretarded View Post
I used my laptop from the front room that runs the TV and sound equipment and it has equalizer APO installed on it and running
If you're using ASIO, E-APO is bypassed. If you want to see what E-APO is doing, you have to run REW under JAVA (then you use E-APO to turn the speakers on and off).
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Quote:
Originally Posted by markus767 View Post
1 ...8 = L R C LFE LS RS LBS RBS
Should be in Jerry's guide, no?
I happen to have my laptop connected up right now, so I generated some tones, and my outputs are different from what you listed:

HDMI5=LBS, 6=RBS, 7=LS, 8=RS.

Why would we differ?
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I believe the more commonly used format is L C R LFE LSR RSR LSS RSS

i.e. rear surrounds are channels 5 & 6

however both mappings exist

sample post with too much detail - http://forum.doom9.org/showthread.ph...85#post1443085
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Markus, here are the requested measurements. All were taken with time reference. 512K.

No YPAO, YPAO volume off. No other enhancers engaged.

SW


LR Main (1/6 octave smoothing)


LRC (1/6 octave smoothing)

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YPAO Natural.

SW


LR Main (1/6 octave smoothing)


LRC (1/6 octave smoothing)

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Quote:
Originally Posted by AustinJerry View Post
Well, try this and see how it sounds, and measures. What you are proposing is called "double bass", and is generally not recommended because it can produce bloated, boomy bass. But maybe you will like it...
Finally got a chance to give this a shot tonight (double bass) by setting the Fronts to Large and Sub to PLUS on the VSX-44. The FR actually doesn't look much better at all.



I cut the graph off at 200Hz because the Frequency Response is the exact same to 20,000Hz past that between the two.

Since there isn't too much difference in FR, I will give it a shot and see how I like it for a while. However, during these sweeps I decided to turn my sub 90 degrees CC so that its now facing in a different direction and with some MiniDSP 2x4HD and PEQ filter help, my LFE FR looks the best I think it ever has in my room.



The only thing I still cannot figure out is why a full 5-20,000Hz sweep with CH1, CH2, or CH3 doesn't seem to crossover nicely. Also has a huge bump from 7000Hz to 13,000Hz - something to do with the room maybe? Anyway for me to work on this?

Notice the jumpiness between 100-1,000Hz.


Here is the CC Sweep with less smoothing:
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Plasma 50" TV: Samsung PN50C8000 — DLP Projector: Optoma GT1080
Projector Screen: Elite VMAX2 Electric — Receiver:Pioneer Elite VSX-44 — Fronts: B&W 684 S1
Center: B&W CM Center S2 — Surrounds: B&W 685 S1 — Subwoofer: Rythmik FV15HP
Rear Surrounds: Polk Audio T15 — Front Heights: Polk Audio T15
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post #21703 of 21705 Unread Today, 12:37 AM
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Quote:
Originally Posted by Hammonje View Post
Markus, here are the requested measurements. All were taken with time reference. 512K.

No YPAO, YPAO volume off. No other enhancers engaged.

[...]
Looks like you've measured all speakers but not just the sub at 3 different mic locations?
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post #21704 of 21705 Unread Today, 07:15 AM
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OK. I'll do that this afternoon. Getting off a bit early today. Thanks.

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post #21705 of 21705 Unread Today, 11:31 AM
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Markus. I moved the SW from the corner to just left of my console in order to attempt a flatter target.

SW Mic Center


SW Mic Left


SW Mic Right


SW Average 3 positions

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