Active Room Treatment (ART) by Dirac

[Oddball]

Your spread is tight so I would not worry. Whatever settings you have they are working great. It is normal that spreads are wider at the each end of ART range. Even if you could have tighter spread, theoretically, I don't think you would be able to differentiate between this and tighter case.

You do want to double check with REW, but from my experience ART prediction is pretty close to REW measurements. And REW check should be with ART on and all speakers engaged so you see combined response.

 

[RenPa]

Whatever settings you have they are working great.

Good news for me.Merci!
ASAP I will measure more than mlp Art filter. For now, predicted corrected and REW at mlp are exactly the same!

 

[OCA]

How are you guys measuring your Atmos channels post Dirac calibration?

 

[TimoJ]

How are you guys measuring your Atmos channels post Dirac calibration?

I use channel remapping, very easy.

 

[OCA]

I use channel remapping, very easy.

That option only exists in the top models, right? I think 8500 also had it.

 

[TimoJ]

That option only exists in the top models, right? I think 8500 also had it.

Monoprice HTP-1 has it. And StormAudio.

 

[Oddball]

How are you guys measuring your Atmos channels post Dirac calibration?

You posted (somewhere) a path to do it on D&M. I must admit that I did not do it yet. Too busy for most of the day, and then just lazy.

Also, from the experience with beds, ART prediction is pretty close to actual REW results.

 

[EngineerNate]

Added a third sub to my 2.2 setup. Two in the front corners and one along the back wall.

All I can say is ART is magic. So very very cool.

 

[mmares056]

How are you guys measuring your Atmos channels post Dirac calibration?

I am using the Dolby Atmos measurement sweeps for REW you graciously created and shared with the public in your Google Drive folder. Greatly appreciated. Thank you.

 

[Oddball]

I am using the Dolby Atmos measurement sweeps for REW you graciously created and shared to the public in your Google Drive folder. Greatly appreciated. Thank you.

Right - that's the one. I have it in my download folder and hopefully will get to using it soon. There is lossy and lossless version

 

[RenPa]

All I can say is ART is magic. So very very cool.

About that I am new ti Art. Here one little gem.
In an episode of *The Mentalist*, there is a motocross race scene. It is sometimes shown from the spectator's point of view and sometimes from the rider's point of view. The sound of the motorcycles follows the scene as it is viewed. Of course, the sound follows the motorcycles as they move from right to left and vice versa. But the sound comes from the center of the MLP when the scene is viewed from the motorcycle rider’s perspective! DLBC didn’t produce this result! A big smile on my face!

 

[90sNintendoKid]

I’m going to be purchasing GSonic Immersive by @OCA for A1 Evo Acoustix measurements and Dirac ART post EQ measurements and general calibration. I’m even thinking of disabling delay and gain in the Dirac app and I haven’t fully researched whether there is an impact on ART.

I’ve got a Minidsp Flex HTx in my chain which means I can experiment with precise delays and gain etc

 

[Oddball]

I’m going to be purchasing GSonic Immersive by @OCA for A1 Evo Acoustix measurements and Dirac ART post EQ measurements and general calibration. I’m even thinking of disabling delay and gain in the Dirac app and I haven’t fully researched whether there is an impact on ART.

I’ve got a Minidsp Flex HTx in my chain which means I can experiment with precise delays and gain etc

Sorry but not following what exactly you are trying to do - looks interesting though.

 

[geox]

Why doesn't Dirac ART include loudness compensation / Fletcher Munson out of the box or as an option ?

 

[EWL5]

Why doesn't Dirac ART include loudness compensation / Fletcher Munson out of the box or as an option ?

Not sure if Dirac wants to be affiliated w/that "type" of exaggerated room correction.

If you really need it, get a D&M unit, calibrate w/Audyssey as a backup RC and enable DynamicEQ as needed. Best of both worlds!

 

[EngineerNate]

I believe the HTP-1 can do pre-Dirac loudness compensation.

 

[TimoJ]

I believe the HTP-1 can do pre-Dirac loudness compensation.

Yes it can. And also tone control and PEQ.

 

[Oddball]

Why doesn't Dirac ART include loudness compensation / Fletcher Munson out of the box or as an option ?

That is an interesting question. I do think that Dirac SHOULD consider various options in this area as part of the package (i.e. not left to implementation of specific brand). At a minimum, it should offer dynamic compression options as that can be useful for many people with late night sessions, or with material that has dynamic range that is not to one's liking. They should not only cater to reference - this is consumer grade product so should provide some preference options.

I was recently engaged in discussion on a different forum how Interstellar audio track (ATV, 5.1) is posing a great challenge to many HT systems. Dialogue levels are overall very low, and for lots of people whispering and low talk levels are ineligible, while the peaks are very significant. So the only option is to constantly adjust the volume - manually, if there are no dynamic compression tools. This is something that TVs and soundbars can do very effectively. Can't really think of many movies like these, but there are certainly some movies where dynamic range is beyond what some people would want to experience at home.

 

[mmares056]

I'm pretty sure everyone using ART has noticed this or perhaps not everyone has noticed it because not everyone measures their system post ART calibration. I always measure post calibration as RCS don't always get it right.

In my experience ART does an excellent job with phase and time alignment. This particular example is for 12 point measurement calibration for a 6ft 3 seater sofa. ART's speaker time alignment is impeccable, all speakers are within 0.53 inches of each other and phase alignment is flat and my system sounds great.

I'm an enthusiast and not expert but I think ART makes my subs start super early, 15ms early(Circled in red) to accomplish its goal of optimizing based on a flat phase. It is my understanding that for subs the start of the impulse response which in my case is 15ms should be aligned at t=0 as this is when energy from the subs starts to arrive at our microphone(Ears). But since Dirac locks us out of delay adjustments post calibrations there is nothing we can do about this early start. I wish Dirac would reconsider and allow for post EQ time alignment at least so that we can correct for this.

 

[ban25]

I was recently engaged in discussion on a different forum how Interstellar audio track (ATV, 5.1) is posing a great challenge to many HT systems. Dialogue levels are overall very low, and for lots of people whispering and low talk levels are ineligible, while the peaks are very significant. So the only option is to constantly adjust the volume - manually, if there are no dynamic compression tools. This is something that TVs and soundbars can do very effectively. Can't really think of many movies like these, but there are certainly some movies where dynamic range is beyond what some people would want to experience at home.

That's just Nolan being Nolan. He deliberately mixes loud music and SFX over top of dialog, describing it as "adventurous and creative." He also refuses to use ADR, so if the dialog recorded by the boom mic over a loud IMAX camera is muddy on the shoot that day, that's what the audience gets. And before I forget, he refuses to adopt Atmos mixes, the best you will get from his films is DTS Master HD 7.1.

Great films, but a very opinionated director.