Active Room Treatment (ART) by Dirac

[EWL5]

Well, not with that attitude! Seems like a fair Q. Does it mean we should delay all other other channels by 5ms? Or is Dirac already compensating for us? The release notes aren't clear on what, if anything, we should do about it

I didn't give you attitude. Reread my post (perhaps when things settle down) and reconsider. I wouldn't change the parts that aren't broken to compensate (to answer your most recent question).

It's funny how some posts all of a sudden transform into a Rorschach test!

 

[OCA]

If all we’re talking about is the LFE then it should not affect speach, music or most sounds. I’m much less worried about getting that explosion just right than getting music right.

5ms is a lot for sub timing, nobody would be getting near perfect post calibration measurement responses if it weren't effecting only the LFE channel but I am just an observer. You could remove 1.6ms of it by changing LPF for LFE setting to 250Hz if you can do that in the AVR menu.

 

[Mort]

Here's a full Dirac Art measurement and a pure GLM compared. Not too different for my 2.1 system.

 

[TimoJ]

Here's a full Dirac Art measurement and a pure GLM compared. Not too different for my 2.1 system.

View attachment 508293

What about Decay measurement of ART and pure GLM?
With 1/6 smoothing and these settings:

 

[Mort]

Is this what you wanted?

 

[TimoJ]

Is this what you wanted?


View attachment 508300
View attachment 508302

Is ART is working/calibrated properly, it should be the better one. Now it's not and looks pretty bad. Unless your measurements are mixed up.

 

[Mort]

I put some new measurements in another thread so I don't clutter this one up.

 

[gepgep]

Ran a calibration on an existing set of measurements
9.4.4 setup and set a flat curve ie 0dB 10hz-400Hz and -3dB at 20kHz
Applied to all channels including LFE

Checked in REW and the 7 bed layer channels and the LFE look fine
The Wides and Tops were all 4dB hot in the bass region above that they were ok

So I tweaked the target curves for those channels to bring them into line with the bed layer and LFE but it did not have any effect at all

Has anyone else had this experience?

Attached the average response of there 2 groups

 

[Defi]

I didn't give you attitude. Reread my post (perhaps when things settle down) and reconsider. I wouldn't change the parts that aren't broken to compensate (to answer your most recent question).

It's funny how some posts all of a sudden transform into a Rorschach test!

"Well not with that attitude" is more of a figure of speech akin to "Maybe there is something we can do about it." I don't think there was anything intended by it.

 

[tifune]

"Well not with that attitude" is more of a figure of speech akin to "Maybe there is something we can do about it." I don't think there was anything intended by it.

Yes, @EWL5 this is basically correct. My apologies, it probably requires you to hear my tone of voice to understand the context

 

[patoulol]

I have auditioned several systems running Dirac Live ART, and I’ve noticed a dry, sharp popping noise in the low frequencies whenever the Active Room Treatment is enabled.

This noise is a distinct 'pop' or 'clack' occurring on low-frequency content (such as kick drums or bass lines) and is consistently reproducible on specific tracks. The issue disappears completely as soon as ART is disabled.

I also observed this exact same issue at MY CINE in France—a high-end dealer equipped with Focal UTOPIA CINEMA speakers—where their subwoofers were also producing these clicking sounds.

Have you noticed this behavior before, or is this a known issue?

 

[EWL5]

Yes, @EWL5 this is basically correct. My apologies, it probably requires you to hear my tone of voice to understand the context

Everything's good! This is why I tell my kids they need to spend less time on the internet and more time IRL. The internet is convenient but I can't see expressions and real emotions!

 

[smygolf]

I have auditioned several systems running Dirac Live ART, and I’ve noticed a dry, sharp popping noise in the low frequencies whenever the Active Room Treatment is enabled.

This noise is a distinct 'pop' or 'clack' occurring on low-frequency content (such as kick drums or bass lines) and is consistently reproducible on specific tracks. The issue disappears completely as soon as ART is disabled.

I also observed this exact same issue at MY CINE in France—a high-end dealer equipped with Focal UTOPIA CINEMA speakers—where their subwoofers were also producing these clicking sounds.

Have you noticed this behavior before, or is this a known issue?

Feels as a thing for the support !
Nothing i have ever heard

 

[Frank207be]

I have auditioned several systems running Dirac Live ART, and I’ve noticed a dry, sharp popping noise in the low frequencies whenever the Active Room Treatment is enabled.

This noise is a distinct 'pop' or 'clack' occurring on low-frequency content (such as kick drums or bass lines) and is consistently reproducible on specific tracks. The issue disappears completely as soon as ART is disabled.

I also observed this exact same issue at MY CINE in France—a high-end dealer equipped with Focal UTOPIA CINEMA speakers—where their subwoofers were also producing these clicking sounds.

Have you noticed this behavior before, or is this a known issue?

I can only think about ART support exceeding speaker and subwoofer capabilities.

I'm running ART on Focal Scala Utopia with 4 subs and my ears give up earlier than any of my speakers.

 

[Oddball]

I can only think about ART support exceeding speaker and subwoofer capabilities.

I'm running ART on Focal Scala Utopia with 4 subs and my ears give up earlier than any of my speakers.

Fully agree. We do have some high SPL systems in this thread and this was never noted.

On my part, I posted before some really tough testing findings at extreme SPL levels that went really smooth, except some (hopefully) temporary hearing damage .

 

[patoulol]

I can only think about ART support exceeding speaker and subwoofer capabilities.

I'm running ART on Focal Scala Utopia with 4 subs and my ears give up earlier than any of my speakers.

I doubt what you say

Enceintes encastrables Utopia Cinema - Systèmes intégrés | Focal

Dans la volonté d’offrir un son sans compromis de la post-production à l’écoute en salle, Utopia Cinema hérite des nouvelles technologies de haut-parleurs issues de notre division Focal Professional.

www.focal.com

 

[Oddball]

I doubt what you say

Enceintes encastrables Utopia Cinema - Systèmes intégrés | Focal

Dans la volonté d’offrir un son sans compromis de la post-production à l’écoute en salle, Utopia Cinema hérite des nouvelles technologies de haut-parleurs issues de notre division Focal Professional.

www.focal.com

Equally so on the other end.

Your post is a bit vague as well. What are "specific" tracks, what is SPL and some tips about the system and settings? I never encountered anything like that even when testing at 130dB levels for subs, albeit on movie soundtracks. Not saying that ART is perfect, but this one is a new one, at least in this (long) thread.

 

[smygolf]

Looking at the specs , correct support lvl and frequency is pretty important.
I take it for granted that it is done in the right way.

Spec

 

[patoulol]

There was a real problem and the seller agreed with me It's like the sound of a speaker member slamming

 

[Frank207be]

Looking at the specs , correct support lvl and frequency is pretty important.
I take it for granted that it is done in the right way.

Spec
View attachment 508689

View attachment 508690

I also read these specs of these €6000 passive subs. Did you see the frequency response? It's sensitivity is down to 85dB at 20Hz compared to the 95dB at 66Hz.

Also the EQ recommendation say it all: 19Hz - 2500Hz ±1dB if you add +12dB @20Hz Q=1.8 and shelving -5dB @50Hz (1st order)
and (LPF? Edit:HPF) 24 dB/oct @18Hz butterworth.

How many if these units does that dealer have in his system?