AVS › AVS Forum › Audio › Receivers, Amps, and Processors › "Official" Audyssey thread (FAQ in post #1)
New Posts  All Forums:Forum Nav:

"Official" Audyssey thread (FAQ in post #1) - Page 1870

post #56071 of 62240
Gentlemen,

Is the subject of all the vivid postings on the issue of phase alignment at or around the crossover splice after about 2-3 days coming to a halt with no conclusion derived or we are still waiting for some magical input to appear and revolutionary change the way we need to think (and do) about all that has been discussed here already. Just curious! smile.gif

Anyone?
post #56072 of 62240
Quote:
Originally Posted by Gary J View Post

Presumably by running Audyssey one has accepted as a goal a calibration that comes close to the Audyssey target curve.
Define it. What you are getting at, that is.
You are assuming, (...and you know what happens when you do that, right?), that Audyssey actually ACHIEVES the Audyssey target curve in the listening area. You would be wrong. I can take measurements anywhere inside the area that I use to take the measurements, and every one of them will be different... and NONE of them will be the Audyssey target curve. I can the take one of those measurements and make it accurate to the Audyssey target curve with some modifications of the settings. So which one is "accurate"? I know which one I want to listen to. Yeah, yeah, yeah, I know what you're gonna say... preference vs. reference blah, blah blah. Well, you can sit in your "inaccurate" seat if you like. I'll take my "accurate" one any time... thanks.

Craig
post #56073 of 62240
Quote:
Originally Posted by bd2003 View Post

But there is going to be an incredible amount of variance within those positions.
It wouldnt be unreasonable to expect something like at a given frequency +3b at one position, +6db at another, and -3db at a third. There's no way it can correct all three, really, the best it could do is basically nothing.
Using a smaller radius centered around a given seat you'd have much less variance, and if say, you got measurements like +2, +3, +4, you could drop it by -3db and at least make some improvement.

I commented on the accuracy of one mic position to calibrate. Sorry, I don't have much interest in your topic.
post #56074 of 62240
Quote:
Originally Posted by craig john View Post

You are assuming, (...and you know what happens when you do that, right?), that Audyssey actually ACHIEVES the Audyssey target curve in the listening area. You would be wrong. I can take measurements anywhere inside the area that I use to take the measurements, and every one of them will be different... and NONE of them will be the Audyssey target curve. I can the take one of those measurements and make it accurate to the Audyssey target curve with some modifications of the settings. So which one is "accurate"? I know which one I want to listen to. Yeah, yeah, yeah, I know what you're gonna say... preference vs. reference blah, blah blah. Well, you can sit in your "inaccurate" seat if you like. I'll take my "accurate" one any time... thanks.
Craig

"ACHIEVES"? I could have sworn I said " comes close" which is exactly what I want out of my Audyssey calibration for my listening area. I have no interest in a best calibration for one seat at the expense of others for my muti-person HT. You can certainly have at playing Whack-a-Mole with your cheap consumer measurement stuff, I have too many movies to watch... thanks.
post #56075 of 62240
Quote:
Originally Posted by mogorf View Post

Gentlemen,

Is the subject of all the vivid postings on the issue of phase alignment at or around the crossover splice after about 2-3 days coming to a halt with no conclusion derived or we are still waiting for some magical input to appear and revolutionary change the way we need to think (and do) about all that has been discussed here already. Just curious! smile.gif

Anyone?

When has that ever happened? tongue.gif
post #56076 of 62240
Quote:
Originally Posted by bd2003 View Post

When has that ever happened? tongue.gif

Call it forum life, eh? smile.gif
post #56077 of 62240
Quote:
Originally Posted by mogorf View Post

Gentlemen,

Is the subject of all the vivid postings on the issue of phase alignment at or around the crossover splice after about 2-3 days coming to a halt with no conclusion derived or we are still waiting for some magical input to appear and revolutionary change the way we need to think (and do) about all that has been discussed here already. Just curious! smile.gif

Anyone?

Well, we MAY not have an answer soon, or ever. But can you agree there will NEVER be an answer if it wasn't discussed at all?smile.gif

Sent from my Galaxy Nexus using Tapatalk 2
post #56078 of 62240
Quote:
Originally Posted by Gooddoc View Post

Well, we MAY not have an answer soon, or ever. But can you agree there will NEVER be an answer if it wasn't discussed at all?smile.gif
Sent from my Galaxy Nexus using Tapatalk 2

Catch 22, isn't it? smile.gif
post #56079 of 62240
Quote:
Originally Posted by Kevin C Brown View Post

Quote:
Originally Posted by bd2003 View Post

They're trying to find a solution that works over a wide seating area for equipment of infinitely variable quality and placement. I'm trying to find a solution for a small seating area with high quality equipment and very specific placement.

So am I.

smile.gif

I just use a really small mike pattern for Audyssey. Main seating spot +/- 1.5 ft all around. I also vary z a few inches up and down too. I like the results I get.


That's pretty much the pattern I use with Pro too. Gives me a superb result. I am only interested in optimising the sound at the MLP.

post #56080 of 62240
Quote:
Originally Posted by mogorf View Post

Gentlemen,

Is the subject of all the vivid postings on the issue of phase alignment at or around the crossover splice after about 2-3 days coming to a halt with no conclusion derived

That's what usually happens. Until the next time, of course wink.gif

post #56081 of 62240
Quote:
Originally Posted by Gary J View Post
 I have no interest in a best calibration for one seat at the expense of others for my muti-person HT...

 

But you can agree that some people are only interested in the best calibration for one seat, right? Those people will use a tight measuring pattern around that one seat - after all, one seat is a "listening area" as you called it earlier - it's just a small listening area. Others, like you, will want the best calibration for several seats and will use a wider measuring pattern to achieve that end. What's the issue over that?

post #56082 of 62240
Quote:
Originally Posted by Gary J View Post

Quote:
Originally Posted by bd2003 View Post

But there is going to be an incredible amount of variance within those positions.
It wouldnt be unreasonable to expect something like at a given frequency +3b at one position, +6db at another, and -3db at a third. There's no way it can correct all three, really, the best it could do is basically nothing.
Using a smaller radius centered around a given seat you'd have much less variance, and if say, you got measurements like +2, +3, +4, you could drop it by -3db and at least make some improvement.

I commented on the accuracy of one mic position to calibrate. Sorry, I don't have much interest in your topic.


He didn't say one mic position, did he?  He said "a smaller radius centred around a given seat". That seems to suggest several mic positions, but, er, centred around a given seat. Am I reading what he wrote incorrectly?

post #56083 of 62240
Quote:
Originally Posted by kbarnes701 View Post

Quote:
Originally Posted by Gary J View Post

Quote:
Originally Posted by bd2003 View Post

But there is going to be an incredible amount of variance within those positions.
It wouldnt be unreasonable to expect something like at a given frequency +3b at one position, +6db at another, and -3db at a third. There's no way it can correct all three, really, the best it could do is basically nothing.
Using a smaller radius centered around a given seat you'd have much less variance, and if say, you got measurements like +2, +3, +4, you could drop it by -3db and at least make some improvement.

I commented on the accuracy of one mic position to calibrate. Sorry, I don't have much interest in your topic.


He didn't say one mic position, did he?  He said "a smaller radius centred around a given seat". That seems to suggest several mic positions, but, er, centred around a given seat. Am I reading what he wrote incorrectly?


Easy to see this is going nowhere, better to just drop it.
post #56084 of 62240
Quote:
Originally Posted by Gooddoc View Post

Quote:
Originally Posted by mogorf View Post

Gentlemen,

Is the subject of all the vivid postings on the issue of phase alignment at or around the crossover splice after about 2-3 days coming to a halt with no conclusion derived or we are still waiting for some magical input to appear and revolutionary change the way we need to think (and do) about all that has been discussed here already. Just curious! smile.gif

Anyone?

Well, we MAY not have an answer soon, or ever. But can you agree there will NEVER be an answer if it wasn't discussed at all?smile.gif

Sent from my Galaxy Nexus using Tapatalk 2

True. Ultimately it comes down to basically the same thing - correct for a small area or a large one. Neither is right or wrong, depends on what you're trying to accomplish. If you're correcting for a small area, phase adjustments have some value. For a large, probably not worthwhile.
post #56085 of 62240
Quote:
Originally Posted by bd2003 View Post

But there is going to be an incredible amount of variance within those positions.
It wouldnt be unreasonable to expect something like at a given frequency +3b at one position, +6db at another, and -3db at a third. There's no way it can correct all three, really, the best it could do is basically nothing.
Using a smaller radius centered around a given seat you'd have much less variance, and if say, you got measurements like +2, +3, +4, you could drop it by -3db and at least make some improvement.

Not sure what you guys argue about. For what it's worth, here's before/after with a small mic pattern:



Details at http://mehlau.net/audio/multeq_xt32_mic_pattern/
post #56086 of 62240
Hi guys!

I have a question for the Audyssey PROs here. smile.gif

I recently bought an Onkyo TX-NR818 - and I could not be more happy with the results from Audyssey MultEQ XT32.
It really banned the standing waves in my room and just sounds awesome.
I made a direct comparison to a Pioneer VSX-2021 with Advanced MCACC and as you might think - MCACC did not even stand a chance.
The results were just embarassing in comparison to XT32.


My question:

The following content is from the Audyssey HP:
Quote:
Features MultEQ XT32
Filter resolution (satellites) 512x
Filter resolution (subwoofer) 512x

I am using a 5.0 speaker configuration:

Front: Sonus faber Liuto (low frequency response extended through active equalization by means of a Nubert ATM - the speakers achieve approx. 29Hz/-3dB with that)
Center: Sonus faber Liuto Smart
Rear: B&W DM602 S3

So of course - the front is on full range and center + rears are crossed over (80Hz center, 50Hz rears).


Does only the 512x filter resolution (satellites) apply in my setup or does the full resolution (including subwoofer 512x) apply since basically my fronts are doing the subwoofer-work...?

Can somebody tell me?
The question is just out of interest... I'm not planning to change my configuration because of it - since it is awesome as it is (wink.gif) AND XT32 banned the standing waves, even if only half the resolution may apply.
post #56087 of 62240
Hi jd17,

filter resolution for sub and satellites is identical in XT32.
post #56088 of 62240
Hi markus - I do know that, hence my quote.

But that can mean two things:

A) 512x resolution in total, no matter the speaker setup
B) 512x resolution for satellites and 512x resolution for subwoofer(s) = 1024x in total (my understanding so far)

...or basically - to simplify - do I benefit from "all there is" with my 5.0 setup or do I not?
post #56089 of 62240
Each speaker gets its own FIR filter. The resolution of each filter is fixed - 512 x "unknown basic number of taps".
post #56090 of 62240
Quote:
Originally Posted by bd2003 View Post


True. Ultimately it comes down to basically the same thing - correct for a small area or a large one. Neither is right or wrong, depends on what you're trying to accomplish.

 

Exactly. I can never understand why people find it hard to grasp that some of us only care about one seat - the MLP. I have extensively experimented with taking measurements around the room and optimising for a wider area and also with taking measurements in a tight pattern around the MLP - and for me there is no doubt whatsoever that the latter works best in my circs and with my requirements. Why wouldn't it?  Optimising a broad area is bound to introduce compromises to get a good result across several seats. All I care about is the best possible result across ONE seat.

post #56091 of 62240
Quote:
Originally Posted by markus767 View Post

Each speaker gets its own FIR filter. The resolution of each filter is fixed - 512 x "unknown basic number of taps".
Thank you markus! smile.gif

So I do benefit from all there is, great!
post #56092 of 62240
Quote:
Originally Posted by jd17 View Post

Thank you markus! smile.gif
So I do benefit from all there is, great!

Now add a couple of subs and you'll benefit even more.
post #56093 of 62240
Quote:
Originally Posted by markus767 View Post

Now add a couple of subs and you'll benefit even more.
Well I (sitting on the MLP) will probably barely benefit from them. But the other seating positions would surely benefit from a couple of subs.

This however is for the future - when I have a separate home cinema room. smile.gif
For now the living room will remain subless. It is also neither easy nor cheap to find subs that can equal the bass quality of my Liutos. Only very good closed subs can do that.
post #56094 of 62240
Quote:
Originally Posted by jd17 View Post

Well I (sitting on the MLP) will probably barely benefit from them.

Such an assessment would require proper measurements at multiple points within the listening area.
Quote:
Originally Posted by jd17 View Post

It is also neither easy nor cheap to find subs that can equal the bass quality of my Liutos. Only very good closed subs can do that.

I'd say it's pretty easy to find a sub that outperforms an 8" driver in a ported box...
post #56095 of 62240
Quote:
Originally Posted by markus767 View Post

I'd say it's pretty easy to find a sub that outperforms an 8" driver in a ported box...
It does not make sense to discuss that in this thread.

However I did not mean the ability to reach lowest frequencies by bass "quality".
Bass quality for me is a fast and clean response without sounding muddy when listening to music.
Most subs that I listened to cannot achieve this. The ones that could were all closed and expensive.
But this is just what I experienced. I am sure there are also some good ported subs that can achieve a clean response.

Besides not all ported speakers using 8" bass drivers have the same bass quality. wink.gif


But again... too much off-topic here. Sorry for that.
post #56096 of 62240
I don't agree on your statements about subs but I agree that it's off-topic. So just something to think about: MultEQ doesn't care what type of sub you have. Depending on the acoustical response at the measured locations it will apply boost below your subs tuning frequency where there's no damping from the box anymore. You already apply boost with the Nubert box so you're probably already running those little 8 inchers beyond their Xmax. It's probably too late when you hear a popping noise while watching something like War of the Worlds. I'd rather aim for clean 30Hz if you're just listening to music.
Edited by markus767 - 8/24/12 at 5:09am
post #56097 of 62240
It's actually 8,66 inches (220mm).
Quote:
Originally Posted by markus767 
MultEQ doesn't care what type of sub you have. Depending on the acoustical response at the measured locations it will apply boost below your subs tuning frequency where there's no damping from the box anymore.
Do you mean that Audyssey MultEQ XT32 can and will do the same thing that the ATM is doing?
I cannot imagine it does. That would basically mean that Audyssey is a danger to all speakers and subs that natively won't go down to 20Hz.
I thought Audyssey "respects" the limitations of your speakers?
Quote:
It's probably too late when you hear a popping noise while watching something like War of the Worlds.
I dont listen to levels that endanger my speakers. Sure, the drivers do have to do some extra "stroke" with the ATM but the Scan-Speak drivers are tough.
post #56098 of 62240
While everyone (?) is waiting for Chris' clarification whether MultEQ applies modifications to the filters before they become active in the AVR or not, I did a little test regarding averaging:

I ran MultEQ with 3 measurements, leaving the mic always in the same location. A 10dB boost and then a cut at 59Hz (Q10) was applied in measurement 2 & 3. Then I measured the acoustical result:



Green = no boost or cut
Blue = -10dB cut in measurement 2 & 3
Red = +10dB boost in measurement 2 & 3

Obviously MulltEQ doesn't weight dips and peaks differently (which psychoacoustically would make sense). Under the test conditions the result is a simple average.
Edited by markus767 - 8/24/12 at 7:37am
post #56099 of 62240
Quote:
Originally Posted by jd17 View Post

Hi markus - I do know that, hence my quote.
But that can mean two things:
A) 512x resolution in total, no matter the speaker setup
B) 512x resolution for satellites and 512x resolution for subwoofer(s) = 1024x in total (my understanding so far)
...or basically - to simplify - do I benefit from "all there is" with my 5.0 setup or do I not?

Quote:
Originally Posted by jd17 View Post

Thank you markus! smile.gif
So I do benefit from all there is, great!

I think your question is: Is the unused processing that would have been used on the LFE channel reassigned to the L/R channels because the LFE is being sent there? Is that a correct interpretation of your question?? If so, the answer is "No." The downmixing of 5.1 to 5.0 happens *before* Audyssey EQ. Therefore Audyssey only "sees" the downmixed, L/R + LFE signal and only applies the single filter tap set of the L/R channels to those signals. The L/R channels don't get the "512x" processing of the LFE channel PLUS the "512x" processing of the L/R channels. The filters for the LFE channel remain unused. In addition, the filtering for the rear surround channels and any DSX channels, (Wides or Heights), remains unused. They don't get reassigned to the other channels either. You only get the one filter set that is available for the channels in use.

PS. I also agree with Markus that adding subs would be beneficial, and not just because you would get to use the Audyssey 512x processing on the subwoofer channel.

Craig
post #56100 of 62240
Quote:
Originally Posted by markus767 View Post

While everyone (?) is waiting for Chris' clarification whether MultEQ applies modifications to the filters before they become active in the AVR, I did a little test.
I ran MultEQ with 3 measurements, leaving the mic always in the same location. A 10dB boost and then a cut at 59Hz (Q10) was applied in measurement 2 & 3. Then I measured the acoustical result:

Green = no boost or cut
Blue = -10dB cut in measurement 2 & 3
Red = +10dB boost in measurement 2 & 3
Obviously MulltEQ doesn't weight dips and peaks differently (which psychoacoustically would make sense). Under the test conditions the result is a simple average.
Gosh, that looks like a smoothed graph. What was the resolution of that measurement? biggrin.gif

Craig
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Receivers, Amps, and Processors
AVS › AVS Forum › Audio › Receivers, Amps, and Processors › "Official" Audyssey thread (FAQ in post #1)