Active Room Treatment (ART) by Dirac

[dlaloum]

Took another look at my initial (semi default) ART setup, vs my 2nd try improved setup...

The first attempt was clearly suffering from a number of issues, where the 2nd attempt is much better sorted

Here are the actual settings with their associated charts:

	Initial Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 on G1,2,3) - All FSH @ 150Hz
	Supported By Group (sup level, FSL)	Filters Used	98 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 2 C	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 3 SL, SR	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 5 SLH, SRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz

And here is where I started to take charge of the support groups, and switch some of them off - one noticeable change - is I went from using all 98 filters, down to only 51 filters (perhaps the default configuration as above, needed more than the 98 filters available??)

	2nd Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 Support allocations edited, All FSH @150Hz
	Supported By Group (sup level, FSL)	Filters used	51 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 2 C	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 3 SL, SR	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz			-18, 20Hz		-18, 29Hz
Group 5 SLH, SRH			-18, 35Hz		-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz		-18, 35Hz			-18, 24Hz

Well isn't that interesting !! - it still isn't perfect (what is!) - but this is a very nicely controlled environment - massively improved, and yet there is less support specified...
My best guess is that this configuration was within the filter capabilites, whereas the previous config, required more filters than I had available - hence it let through more flaws!!

Perhaps we should keep an eye on the filters used field... avoid any configuration that maxes out the filters (as we cannot tell whether it is just enough filters or not enough filters... ART doesn't tell us how many it wants... just how many it has used.

Still a bit messy in the 20Hz to 35Hz and 120Hz to 150Hz ranges... I have a 130Hz resonance which is pernicious.. and performance of all my speakers is constrained below 30Hz... although the front L/R and subs should be capable of 24Hz... the Dirac measurements sets their FSL at 28.6Hz... I think the peaks and troughs tend to trick Dirac's frequency limitation algorhythm - I would have hoped for better decay control in the 24Hz to 35Hz range.... perhaps more tweaking is warranted.

 

[Denon545]

@dlaloum - Nice job!

In my setup, raising the subwoofer support from -18 to -24 makes the response more linear. I would think the same is true for the speaker support, but I haven’t tested that yet as I like how they sound around -18.

 

[kawauso]

Took another look at my initial (semi default) ART setup, vs my 2nd try improved setup...

The first attempt was clearly suffering from a number of issues, where the 2nd attempt is much better sorted

Here are the actual settings with their associated charts:

	Initial Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 on G1,2,3) - All FSH @ 150Hz
	Supported By Group (sup level, FSL)	Filters Used	98 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 2 C	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 3 SL, SR	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 5 SLH, SRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz

View attachment 497822


And here is where I started to take charge of the support groups, and switch some of them off - one noticeable change - is I went from using all 98 filters, down to only 51 filters (perhaps the default configuration as above, needed more than the 98 filters available??)

	2nd Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 Support allocations edited, All FSH @150Hz
	Supported By Group (sup level, FSL)	Filters used	51 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 2 C	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 3 SL, SR	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz			-18, 20Hz		-18, 29Hz
Group 5 SLH, SRH			-18, 35Hz		-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz		-18, 35Hz			-18, 24Hz

View attachment 497827

Well isn't that interesting !! - it still isn't perfect (what is!) - but this is a very nicely controlled environment - massively improved, and yet there is less support specified...
My best guess is that this configuration was within the filter capabilites, whereas the previous config, required more filters than I had available - hence it let through more flaws!!

Perhaps we should keep an eye on the filters used field... avoid any configuration that maxes out the filters (as we cannot tell whether it is just enough filters or not enough filters... ART doesn't tell us how many it wants... just how many it has used.

Still a bit messy in the 20Hz to 35Hz and 120Hz to 150Hz ranges... I have a 130Hz resonance which is pernicious.. and performance of all my speakers is constrained below 30Hz... although the front L/R and subs should be capable of 24Hz... the Dirac measurements sets their FSL at 28.6Hz... I think the peaks and troughs tend to trick Dirac's frequency limitation algorhythm - I would have hoped for better decay control in the 24Hz to 35Hz range.... perhaps more tweaking is warranted.

It’s almost perfect. Did you use the same measurement data as last time? The remaining resonances are masked,
so they’re not an issue. If you look at the 20 ms and 40 ms values in the decay, they should be significantly reduced compared to the non-ART case.

dlaloum, how does the sound quality of your current setup feel now? It sounds like it’s become really good.
If you were to rate the default sound quality and the current one, what scores would you give them?

 

[dlaloum]

It’s almost perfect. Did you use the same measurement data as last time? The remaining resonances are masked,
so they’re not an issue. If you look at the 20 ms and 40 ms values in the decay, they should be significantly reduced compared to the non-ART case.

dlaloum, how does the sound quality of your current setup feel now? It sounds like it’s become really good.
If you were to rate the default sound quality and the current one, what scores would you give them?

straight DL measurements show lots of issues -my current setup is improved "out of sight" ... based on objective measurements.

Having said that the audible difference is actually subtle there is improved imaging, detail in whatever I listen to is easier to discern - everything is clearer...

But a superficial listening indicates a well sorted setup, sounding good... it requires sit down critical listening to identify the improvements.

On the other hand, listening is now a more relaxed affair... it is easier to listen for extended periods - we are listening at slightly higher levels (which allows further increased discernment of detail) without it "feeling" louder.

Where the system was previously 8/10 I would say it is now 8.5/10 or maybe 9/10

But then I refer back to my "rule of thumb" - each discernible stepwise improvement, doubles the cost of the system/component involved - which has been my long term experience of sources, amps, speakers...

Given that my upgrade required a new AVR as well as the Dirac software licence, at a total cost of AU$4000... this aligns quite reasonably with my rule of thumb.

What I will say, is that for those already on a platform that supports ART (Denon or Marantz) - the cost of the Dirac ART licenses, is an enormous bargain... achieving the stepwise upgrade at around 1/4 or less the expected $$$.

For those that need to purchase the platform as well as the software, it is still a good deal, but there may be other upgrades that would provide equivalent value. (and this calculation has substantial variations given the platform could be anywhere from the circa US$1000 of the X3800, to the $$$$$ of a StormAudio AVP and its associated amps)

 

[Frank207be]

Just spent the whole morging doing a 17 point DIRAC ART measurement, the first since my purchase of ART when it was released. I ran into countless network problems but I finally got everything measured, calculated and uploaded to my 7.4.6 A1H.

But out of curiosity I did an REW measurement (Why on earth did D&M skimp on the front HDMI port????)

First one is with the infrasonic checkbox active ONLY on the subwoofers
Second one is with infrasonic checkboxes active on ALL speakess (except the top channels) and a +1dB boost

Lottery?

 

[Frank207be]

I also modified my flat curve and added a 5dB and 9dB boosted preset for watching movies: You can clearly see that Dirac "Harman Curve" boost only starts rising from 20Hz:

 

[Oddball]

Took another look at my initial (semi default) ART setup, vs my 2nd try improved setup...

The first attempt was clearly suffering from a number of issues, where the 2nd attempt is much better sorted

Here are the actual settings with their associated charts:

	Initial Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 on G1,2,3) - All FSH @ 150Hz
	Supported By Group (sup level, FSL)	Filters Used	98 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 2 C	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 3 SL, SR	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 5 SLH, SRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz

View attachment 497822


And here is where I started to take charge of the support groups, and switch some of them off - one noticeable change - is I went from using all 98 filters, down to only 51 filters (perhaps the default configuration as above, needed more than the 98 filters available??)

	2nd Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 Support allocations edited, All FSH @150Hz
	Supported By Group (sup level, FSL)	Filters used	51 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 2 C	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 3 SL, SR	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz			-18, 20Hz		-18, 29Hz
Group 5 SLH, SRH			-18, 35Hz		-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz		-18, 35Hz			-18, 24Hz

View attachment 497827

Well isn't that interesting !! - it still isn't perfect (what is!) - but this is a very nicely controlled environment - massively improved, and yet there is less support specified...
My best guess is that this configuration was within the filter capabilites, whereas the previous config, required more filters than I had available - hence it let through more flaws!!

Perhaps we should keep an eye on the filters used field... avoid any configuration that maxes out the filters (as we cannot tell whether it is just enough filters or not enough filters... ART doesn't tell us how many it wants... just how many it has used.

Still a bit messy in the 20Hz to 35Hz and 120Hz to 150Hz ranges... I have a 130Hz resonance which is pernicious.. and performance of all my speakers is constrained below 30Hz... although the front L/R and subs should be capable of 24Hz... the Dirac measurements sets their FSL at 28.6Hz... I think the peaks and troughs tend to trick Dirac's frequency limitation algorhythm - I would have hoped for better decay control in the 24Hz to 35Hz range.... perhaps more tweaking is warranted.

Glad you are enjoying ART and the hopefully you will not regret your investment. Just to be honest on the graphs, you should extend the measurement to 1ms. You can already see the improvement, but there will be more decay both ways beyond 300 ms.

 

[fzst]

First one is with the infrasonic checkbox active ONLY on the subwoofers
Second one is with infrasonic checkboxes active on ALL speakess (except the top channels) and a +1dB boost

Lottery?

Which channel did you measure here? I wonder if ART only applies the infrasonics to the LFE-channel and not the other speakers if you don't specifically toggle the infrasonics checkbox in each speaker group? Did you measure the LFE- channel as well? Would be interesting to see if there is a similar difference there.

I also modified my flat curve and added a 5dB and 9dB boosted preset for watching movies: You can clearly see that Dirac "Harman Curve" boost only starts rising from 20Hz:

I noticed something similar in my setup and frankly I don't like it. I can live with the sub 20Hz- frequencies not being boosted much but I don't like that ART raises the bass frequencies very linearly from 20 -100Hz, I like to boost the <50Hz region quite a lot to get some deep bass sensation at lower volume levels but I don't need a 10dB+ raise at 80Hz... I must admit though I need to put in more time to try to figure out a more aggressive custom TC for more deep bass, hopefully I'll have some time to tinker with my setup over the holiday break...

 

[alvigg]

For all that want bass in the sub-20Hz range. What movies/music has sound that low?

 

[EWL5]

straight DL measurements show lots of issues -my current setup is improved "out of sight" ... based on objective measurements.

Having said that the audible difference is actually subtle there is improved imaging, detail in whatever I listen to is easier to discern - everything is clearer...

But a superficial listening indicates a well sorted setup, sounding good... it requires sit down critical listening to identify the improvements.

On the other hand, listening is now a more relaxed affair... it is easier to listen for extended periods - we are listening at slightly higher levels (which allows further increased discernment of detail) without it "feeling" louder.

Where the system was previously 8/10 I would say it is now 8.5/10 or maybe 9/10

But then I refer back to my "rule of thumb" - each discernible stepwise improvement, doubles the cost of the system/component involved - which has been my long term experience of sources, amps, speakers...

Given that my upgrade required a new AVR as well as the Dirac software licence, at a total cost of AU$4000... this aligns quite reasonably with my rule of thumb.

What I will say, is that for those already on a platform that supports ART (Denon or Marantz) - the cost of the Dirac ART licenses, is an enormous bargain... achieving the stepwise upgrade at around 1/4 or less the expected $$$.

For those that need to purchase the platform as well as the software, it is still a good deal, but there may be other upgrades that would provide equivalent value. (and this calculation has substantial variations given the platform could be anywhere from the circa US$1000 of the X3800, to the $$$$$ of a StormAudio AVP and its associated amps)

Glad to see you're enjoying the investment! I think you made the right choice not waiting for PAC to get their act together. If what you said is true about internal turmoil b/w PAC and Dirac, then it's pretty ironic that the AVRs that brought Dirac to the masses has been left behind in the Dirac tech race!

It is also not entirely lost on me that former Dirac co-founder Mathias Johansson left to lead Harman International’s Signal Processing & Applied Intelligence Lab last year. Could this be part of the success of bringing ART over to D&M (now owned by Harman)?

Dirac Names New CEO as Co-Founder Mathias Johansson Departs for Harman

Anders Storm, a semiconductor industry veteran, brings deep technical knowledge to Dirac as its new CEO. Meanwhile, Dirac co-founder Mathias Johansson is leaving the company to join Harman.

www.audioholics.com

 

[alvigg]

For what it is worth, this is why Chat GPT says dirac doesn't go below 20 Hz.

3.​

• Sub-20 Hz waves have very long wavelengths (≈17 meters for 20 Hz).
• In most listening rooms (a few meters across), room modes are sparse at these frequencies.
• Dirac’s measurement and correction algorithms rely on capturing room responses accurately, which becomes meaningless when the wavelength is much longer than the room dimensions.

---

4.​

• Active Room Treatment uses DSP filters to adjust frequency response.
• Extremely low frequencies (below 20 Hz) are near-DC signals, which are tricky to process without causing drift, instability, or very high gain requirements.

 

[Oddball]

Which channel did you measure here? I wonder if ART only applies the infrasonics to the LFE-channel and not the other speakers if you don't specifically toggle the infrasonics checkbox in each speaker group? Did you measure the LFE- channel as well? Would be interesting to see if there is a similar difference there.



I noticed something similar in my setup and frankly I don't like it. I can live with the sub 20Hz- frequencies not being boosted much but I don't like that ART raises the bass frequencies very linearly from 20 -100Hz, I like to boost the <50Hz region quite a lot to get some deep bass sensation at lower volume levels but I don't need a 10dB+ raise at 80Hz... I must admit though I need to put in more time to try to figure out a more aggressive custom TC for more deep bass, hopefully I'll have some time to tinker with my setup over the holiday break...

LFE would apply only to speakers that extend to less than 20hz. So if you have any groups except the subs, yes you could do it. But in general terms, that is a no go scenario.

If you have specific requirements from the curve, you will need to try our various options. In my experience ART is not that great in following those - my best guess on technical basis. But you should definitely try and report back as other users might have the same preferences.

What you seem to be looking for is the DEQ and as mentioned before, you can get than in general bass range with setting curves from +2 to +12.

 

[Frank207be]

Which channel did you measure here? I wonder if ART only applies the infrasonics to the LFE-channel and not the other speakers if you don't specifically toggle the infrasonics checkbox in each speaker group? Did you measure the LFE- channel as well? Would be interesting to see if there is a similar difference there.



I noticed something similar in my setup and frankly I don't like it. I can live with the sub 20Hz- frequencies not being boosted much but I don't like that ART raises the bass frequencies very linearly from 20 -100Hz, I like to boost the <50Hz region quite a lot to get some deep bass sensation at lower volume levels but I don't need a 10dB+ raise at 80Hz... I must admit though I need to put in more time to try to figure out a more aggressive custom TC for more deep bass, hopefully I'll have some time to tinker with my setup over the holiday break...

I measured L+R.

I like the whole bass region. Snappy midbass is to die for

 

[JRowland]

For all that want bass in the sub-20Hz range. What movies/music has sound that low?

I don't do movies but 5 music test tracks I use because I believe they get there according to what I have read (I don't have or care to have an analyzer)

Limit To Your Love - James Blake
Boom Boom Pow - Black Eyed Peas
Supercut - Lorde
Flight of the Cosmic Hippo - Bella Fleck and the Flecktones
Bass I Love You (and plenty more) - Bassotronics

The hardest bass for my system to play is Bad Guy by Billie Eilish (mentioned a few pages back - the whole album has great bass) and Money Trees by Kendrick Lamar. Bad Guy is where I bottom woofers so I use it for my full volume (or where to set my limit) runs, and Money Trees is hard to get "right" (too much or not enough decay). For overall when I hear a song I know and the bass feels light with the tune I throw on I'm Dat N**gga by Future (lyrics aren't my thing but that bass and the vocal effect). This song feels like it will crack my concrete foundation and has been a good one for me for tuning how much or how little decay I like. No matter how tight I get my spread the bass in my room with this song is always very powerful, spread just affects the "boom". The vocals also rapidly bounce between the front 3 speakers in the Atmos mix, if you don't have the support "right" you can notice it whereas when the support is "right" it is hard to pick up on.

 

[JRowland]

I wonder if ART only applies the infrasonics to the LFE-channel and not the other speakers if you don't specifically toggle the infrasonics checkbox in each speaker group?

I had to go into my left and right front (I did rear too although I notice no difference) speaker group and enable infra on my subs even though it was enabled in the LFE channel. Without checking the box my speakers were (showing on the fr graph) done at 20hz but when I enable infra on the subs I'm back to 15Hz.

 

[JRowland]

I've been having fun messing with the spread. I went down to left front playing down to 30hz (im at 0db at 23Hz on that speaker in room) and the left sub only playing up to 50HZ (only support to left main) and did similar with each speaker and no support for the surrounds except each other at -1 because I had to to be allowed to separate them. It presented like Audyssey with traditional crossovers, almost all the boom was back my room. I went the other way and got the spread as tight as possible for each speaker, it's not natural sounding to me. Very little support showed me too much "boom" and lots of support brought very little and not like anything I have ever experienced in real life. I have learned I like a Goldilocks middle of the road. I have also learned I don't like front to rear support, I don't mind a little rear to front support, and if I could not have the boom keeping things very left/left, right/right, front/front/ and rear rear gives me the best envelopment and stereo separation. Now I'm fiddling with the best compromise for me, it's a lot of fun!

 

[janbth]

Took another look at my initial (semi default) ART setup, vs my 2nd try improved setup...

The first attempt was clearly suffering from a number of issues, where the 2nd attempt is much better sorted

Here are the actual settings with their associated charts:

	Initial Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 on G1,2,3) - All FSH @ 150Hz
	Supported By Group (sup level, FSL)	Filters Used	98 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 2 C	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 3 SL, SR	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 5 SLH, SRH	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz	-18, 50Hz	-18, 35Hz	-18, 20Hz	-18, 20Hz	-18, 24Hz

View attachment 497822


And here is where I started to take charge of the support groups, and switch some of them off - one noticeable change - is I went from using all 98 filters, down to only 51 filters (perhaps the default configuration as above, needed more than the 98 filters available??)

	2nd Setup configuration: groups chosen by Dirac, Levels set by Dirac, FSL manually adjusted for Group 1, Group 3, Group 6 Support allocations edited, All FSH @150Hz
	Supported By Group (sup level, FSL)	Filters used	51 / 98
	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6
Group 1 L/R	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 2 C	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 3 SL, SR	-18, 30Hz		-18, 35Hz			-18, 24Hz
Group 4 FLH, FRH	-18, 30Hz			-18, 20Hz		-18, 29Hz
Group 5 SLH, SRH			-18, 35Hz		-18, 20Hz	-18, 29Hz
Group 6 SW1, SW2	-18, 30Hz		-18, 35Hz			-18, 24Hz

View attachment 497827

Well isn't that interesting !! - it still isn't perfect (what is!) - but this is a very nicely controlled environment - massively improved, and yet there is less support specified...
My best guess is that this configuration was within the filter capabilites, whereas the previous config, required more filters than I had available - hence it let through more flaws!!

Perhaps we should keep an eye on the filters used field... avoid any configuration that maxes out the filters (as we cannot tell whether it is just enough filters or not enough filters... ART doesn't tell us how many it wants... just how many it has used.

Still a bit messy in the 20Hz to 35Hz and 120Hz to 150Hz ranges... I have a 130Hz resonance which is pernicious.. and performance of all my speakers is constrained below 30Hz... although the front L/R and subs should be capable of 24Hz... the Dirac measurements sets their FSL at 28.6Hz... I think the peaks and troughs tend to trick Dirac's frequency limitation algorhythm - I would have hoped for better decay control in the 24Hz to 35Hz range.... perhaps more tweaking is warranted.

This is an interesting comparison of default ART with modified ART, but it seems that you compare L before with R after. It would be interesting to see L+R both before and after. Any chance of seeing that?

 

[Frank207be]

I had to go into my left and right front (I did rear too although I notice no difference) speaker group and enable infra on my subs even though it was enabled in the LFE channel. Without checking the box my speakers were (showing on the fr graph) done at 20hz but when I enable infra on the subs I'm back to 15Hz.

Exactly what I found: left and right get supported by subs but only to 20Hz. F-support Low doesn't go below that unless you check the infrasonic box in that specific group.

To me it's especially useful for extending infrasonics with stereo music or concert video's that have no separate LFE channel.

 

[JRowland]

Any idea on why with ART I do not notice not having DEQ, I thought I would miss it? Bass levels seem to me always the appropriate amount regarding the volume. Could it be because my volume knob never gets lower than -30?

 

[Oddball]

Any idea on why with ART I do not notice not having DEQ, I thought I would miss it? Bass levels seem to me always the appropriate amount regarding the volume. Could it be because my volume knob never gets lower than -30?

That's great if you feel it that way, but there is no equivalent of DEQ feature in Dirac and ART in particular. I can't honestly tell as my lowest volume is -10dB and moving up just makes things better.