Exellent, thank you. I've heard yoy talk about Atmos channels being louder in some cases. This depends on your receivers layout. For example, there is a volume difference in the Atmos channels for a ceiling layout vs an Auro 3D layout. Receivers account for this difference in layouts by applying different volumes to each layout. If you measure an Atmos speaker directly (nearfield) it's much louder than all of the other speakers, however, if you measure in the MLP, then it measures normally. I'm glad these work with VLC Player, I appreciate your dedication and hard work.
There's a dialnorm setting in Atmos files which instructs the encoder how to align volumes of all speakers relative to center channel and it's different for Film, Music, etc. (there's even Film light and FIlm standard sub settings). I created these sweeps with the lowest possible dialnorm setting at -31dB which should remove all sorts of volume variations between channels but I still get surrounds about 1.3dB lower compared to REW's own sweeps. I guess (and believe) for best results all calibration should be done with the played sweeps so as to keep up with what the Atmos encoder will do while playing an Atmos movie.
thanks for this, it worked like a charm with the PC with JAVA driver. could not figure it out on the MAC but probably a setting in the VLC player I need to figure out. It was great to measure all channels in REW to include wides and in-ceiling that i had never had the ability to do in the past.
I think that speaker resonances can make the treble and bass higher in some cases. I might be sweeping my speakers at too high a volume. Going to run some tests today.
I am looking for some help from someone who has been able to play these tones from their height channels. I have tried many ways but just cannot get the height channels to to play. The sounds ends up coming from bed layer speakers. The input signal though on the denon avr shows PCM which does not show the height channels active. Could that be the issue? If so, how do I get hat to change to Atmos? Anyone has any ideas? @ocaudiophile
Hey OCA, is it possible for you to create a full range pink noise for all 16 channels and the point one channel, that plays pink noise all at the same time in Dolby Atmos? Does Davinci Resolve allow you to place a full range signal in the LFE channel?
This could be a huge help to someone has can afford an AVR that has per channel EQ adjustability. My AVR only has tone controls, but I'm glad to have that some AVRs don't. Thanks for posting this OCA!
Hey OCA, do you know if the -3db sweep on the subwoofer channel, the roll off effect phase? Is it best to do phase alignment in REW or are the sweeps okay for subwoofer alignment?
The Atmos subwoofer sweep is better for time alignment because it embeds the original Dolby low pass filter @120Hz in it which adds a tiny time delay but since this delay is also applied to the LFE channel by the Dolby decoder in the AVR during movie playback, timing of the sw will be more precise. You should use the latest TrueHD lossless Atmos sweeps btw, as I know you're also a bit OC like me ;
Hey, just wondering, what is the best length for measuring subwoofers? 4M? Are longer sweeps always better for subs? The subwoofer test tones you've provided, are they better than REW? If so why? Thanks.
If you have the time, 4M length will yield the highest signal to noise ratio. Also the louder the better for SNR. But multiple 4M measurements is a bit too heavy on the PC and may slow REW down. I generally use 1M for accurate measurments and even 256k is enough to create adequate filters in silent rooms. REW's files are in .wav format so they are lossless, too but there's a lowpass filter at 120Hz and a slight delay in Dolby .mlp file which is also applied to Atmos movies by the encoder so they will be a more realistic representation of your LFE response during Atmos movie playback. Frankly, I doubt there will audible differences at these low frequencies though.
Hey OCA, quick question, which speaker is being used as reference timing ? and whats the dbfs volume these are set as ? im trying to setup my dolby height speakers but i need to do the time aligntment correctly aswell, as iv measured my other speakers in rew with center as the reference, but for some reason, with the front top left, there is a massive delay of 46ms when i run this file and check the impulse graph. ( other top speakers area roughly inline ).
They're produced from -12dBFS standard REW generated wave sweeps with -31 dialnorm setting for Atmos rendering for minimal dialog normalisation effect.
Hey OCA, I've calibrated my entire system with your sweeps in Dolby Atmos, and they sound amazing. I did the same thing using REW sweeps; it doesn't sound as good. Do you know why? Also, when I play an REW sweep, and then I play your sweep on the same channel, there are slight differences even when smoothed to psychoacoustic. Is it something to do with being played in Atmos instead of multi-channel 7.1 or because it's 24bit/48? Are REW sweeps 24bit/48 or 16bit/48? I'd like to EQ my subwoofer with your sweep, but do you think I should correct for the -3db slope? Because if the sweeps are better in all of the other channels, I'm wondering if the subwoofer would be better with your sweeps too. I need to figure our how to compensate for the -3db difference after 80hz.
I experienced the same in my system especially with Atmos movies. My guess is that the DSP processor in the AVR is applying some subtle volume changes depending on the "dialnorm" value it reads and since the sweeps also contain a dialnorm value in them, the calibration is more accurate. The effect is even more noticeable with the subwoofer because Atmos LFE sweep has a low pass filter at 120Hz embedded by Dolby which introduces a certain delay. With the sweeps, your time alignment takes care of that. With REW LFE sweeps, timing will be a liitle bit off when used for playing am Atmos track although it might be spot on in the measurements.
Yeah, I'm not sure if it's dialnorm or what, but the result is much cleaner, and music and movies sound better with your files than REW. REW sounds dry and the treble doesn't sound as good as when I EQ with your files. Unfortunately, I just wasted an entire day calibrating with REW sweeps. I'm only using your files from now on. The difference is obvious.@@ocaudiophile
I continue to struggle in getting the sweeps to play from the Atmos speakers. I have tried it on a Mac and a windows 11 PC but no luck. The height sweeps come through the bed layer speakers. Anyone has any idea on how to trouble shoot?
Hey OCA, when you pass through with VLC Player, are there any other settings that change the sound? Like, for example, Enable time-stretching audio? Also, the gain settings, do you know if any of these have an effect when audio is passed through to the receiver? My thoughts are that they don't have an effect when you passthrough to a receiver, but I might do some testing just to check.
Do you have a utility to convert .mqx files to REW .mdat? would make measuring all channels easier. Also, what would be the proper way to make repeated corrections? meaning you create a measurement from filters for the purpose of MQX target curve on excluded measurements, measure the result and say it needs further eq, so you create another measurement from the second eq, and then apply that to the first filter you created... how? multiply? vector?
REW is only applying mic calibration after the sweep is completed so I don't think that will have an effect on timing. With USB mics, make sure you tick adjust clock with acoustic ref in preferences and timing will be as good as an analogue mic.
Can we use REW on the Mac with this multichannel TrueHD mkv? I have decent parametric equalization for my 9.2.4 processor. What UMIK microphone should we use?
Hi OCA, These measurements sweeps are great. The front wide channel sweeps, however, seem to have the respective side surrounds engaged as well. The rest of the channel sweeps are great. I tested this using the level meters on my Trinnov where 2 channels light up when playing the wide channel sweeps. Also, any chance that you could increase the time between the channel sweeps? Alternatively, it will be great if REW just had a mode where it just stayed in measurement mode and auto-incremented filenames based on the start/end of the acoustic timing reference.
İ did not test front wide channels specifically as I don't have them in my system but they were produced in the sane way as all the others. I'll double check. There were also others who asked for that kind of automation from REW. I will raise that demand with John and see if I can convince him to add that.
Do all these sweeps have the same problem? drive.google.com/file/d/1YjQmnqq9slHruUGekggkVn8chk1mHjjS/view?usp=sharing drive.google.com/file/d/1lGFGkomIuUJ56SdOFW5y8k7ahIIZCGRH/view?usp=sharing drive.google.com/file/d/1YTQ8Wq-Moc0Xe8uyljPcDSY0mrau9agL/view?usp=sharing
I couldn't find any DSP engine which can process FIR filters for car audio. Simple IIR EQ can be done easily with REW auto-eq though we'll need multiple point measurements.
@@ocaudiophile I see. I've found several very basic guides for RTA EQ but I figured you might have put your special, highly technical, spin on it. Thanks for the reply
A subscriber told me there's a way to measure Auro 3D by switching to a certain mode but I don't have Auro and cannot confirm. You will need to check video comments and find it (probably under the Auro video).
@@ocaudiophileOkay, good to know. Another question, would it be best to use these sweeps for measuring all my speakers in 8 locations and replace the "Response Data" in the .ady file in json editor. Then EQ to a target curve below 500 Hz and above 500 Hz and enter that in the "customTargetCurvePoints"?
Response data in the ady file is always replaced with a Dirac pulse (perfect speaker) to convert CustomTargetCurvePoints to filters. That's the basic idea in all these videos.@@mikeortiz2139
Hallo, ich versuche es jetzt mal auf deutsch; Muttersprache ist einfacher und ich glaube Du sprichst auch deutsch, oder!? ich habe jetzt nämlich alles mögliche probiert -soeben sogar den AVR (Denon X4800H) komplett resettet-; aber immer wenn ich in REW mit den Sweeps messe sind alle 4 Surroundkanäle um ca. 12-15dB leiser als die Frontkanäle (habe vorne: FL/C/FR/TFL/TFR und SL/SR und benutze TFL/TFR für meine Surround-Heights). Wenn ich mittels 'from REW' messe ist das nicht der Fall; irgendeine Idee woran das liegen könnte, bzw. was ich da falsche mache? Bin so dankbar für Deine Videos und versuche die Methoden auch anzuwenden; es klingt auch wirklich echt gut, aber auch beim Nachmessen sind die Surround-LS halt wieder um diesen Anteil leiser. Danke im Voraus und Grüße
Sie müssen "Loudness Management" deaktivieren, damit der Receiver die Lautstärke nicht auf der Grundlage der Dialnorm-Einstellungen dimmt (ich glaube, Denon nennt es "Bass Control"). Das Problem ist, dass diese Loudness-Menüpunkte nur vorübergehend während der Atmos-Wiedergabe verfügbar sind. Informationen zu diesem Thema finden Sie im Audyssey ART-Video.
@ocaudiophile In the VLC settings, is there a difference between HDMI/SPDIF Passthrough Enabled and Enabled (only AC3/DTS) ? I only get Sound passed when enabling the second option.
Is the device set to "Windows Multimedia Device"? Btw, if you're using a mac, they cannot pass pcm over HDMI and AC3 is probably playing a downmixed non-Atmos version.
I believe HDMI passthrough bypasses all Windows sound settings but I am not an expert on VLC. I use just these two settings on default VLC and it always works. Maybe make sure everything is set to 48kHz sampling rate?@@sayfuandsmile7302
gonne take another look at the sampling rate on the weekend. It was greyed out at the laptop but set to 48k and if i remember right 16bit, couldn t do a change.@@ocaudiophile
hi again. Just gave it another try. No chance getting the files properly played through vlc. Meassuring with internal rew sweeps just works fine. Could you be so kind and take a quick look at my settings? I ll provided u a googldrivelink with screenshots drive.google.com/drive/folders/1HSJmoaw9nf-34zkIgA7ep3cVmvbIeeDg?usp=share_link @@ocaudiophile
hi, very much impressesd the way you bring content/tutorial, interested to know about yourself what u do, what u studied, how u make scripts for audyssey, u just made me one step higher in audio calibrations, waiting for car audio tuning with helix dsp
Hey OCA...just a couple of simple questions pls... 1. Are these *Creating EQ filters* methods same as methods of EQ filteration shown in the videos---- *Measuring Height Atmos Channels and Measuring Atmos Manual Callibration*--- in these videos you manually enter the Graphic EQ generated data by Optimasing gains into your receiver for each channel upto 16000..... Q2. What is the difference in manually entering the data(such as speaker distances,speaker levels,crossovers,graphic eq filters etc.) into the receiver and creating target curves for each speaker and then exporting that data as adv file thru multi eq editor app into the receiver??? I hope both my questions are clear to you... Reply soon...thanks😊
Hello, i have a question and i hope you can help me even if not related to this video. In some newer yahama av reciver ther's no more parametric equalizer(peq) like in my rx-v6a, butonly a GEW equalizer that permit to only change the gains like in marantz/denon from -6 to +6. Only in high end models they kept the peq. So my question is if i want to equalize my measurament of speakers with rew, how i can obtain the correct q factor to apply the gain correction like a denon? Thanks.
I don't know, needs to be tested. It took me quite a bit of work to find out Denon/Marants Q values. But there's a standard so I guess you can go with the Q values of Denon/Marantz.
Awesome Thanks for this. Am I correct in assuming that these new losses files will give better REW measurement results than the previous files you provided?
Correct, especially in the high frequencies. And more importantly, they will not be effected from receiver's internal dialnorm/loudness management settings.
Every channel is identical at -12dBFS REW measurement setting. TrueHD LFE has a lowpass filter and the response is -3dB lower at 120Hz also adding about 1.7ms delay (60cm). But I guess Dolby Atmos movies are also applied that filter in the decoder so you might consider using that for calibration rather than REWs own. Surround channels are also about -1.3dB lower and that must be the effect of the "Film Light" Atmos setting despite -32 dialnorm applied to the sweeps which should remove any decoder normalization effects. I would assume height channels would be similar. Again, since all movies you will be watching will be applied the same adjustments, you might wanna use played sweeps for every channel if you'll only watch Atmos movies in your system. My Windows audio drivers are a bit buggy at the moment after all the gizmos I've done in my PC to produce these sweeps so it might be a problem specific to me but I couldn't get the sweeps played when using Java EXCL drivers in REW. Only ASIO drivers work with VLC media player and they need to be turned on and off (the old method) if you will switch between REW's own and played sweeps. Lastly, make sure you turn ALL kind of loudness management OFF in the AVR. Some settings only show up during Atmos playback and will immediately disappear upon pause!
Hey OCA, got another question concerning level matching after calibration. I used the atmos demo you provided with the supreme video (if i remember correctly) to get the levels equal to 75db. I am using my Umik and of course REW. Use z weighting and slow. When I adjusted every speaker to lets say 75db and measure afterwards with REW (Java Excl) I found out that I miss around 5 db from the subwoofer, the graphs falls off around the XO frequency by roughly 5 db. When I change the sub level by this amount (5db) and remeasure it seems to be a relatively flat line. What do you think? Should I leave the levels adjusted with the atmos demo or add a few db to the sub to get a smooth line? Thanks Sir.
The random pink noise in that demo is full range (0-24000 possibly) and to get the true loudness of the sub, the pink noise should be in the range 20-120 or something. And subs yield 2-3dB different results each time you measure with pink noise. For speaker, I rely on REW's auto target level but with a sub that's also not easy. Use 1/1 smoothing and level the responses with the other speakers. That's what I do but I also find myself playing with sub level regularly during movies.@@saschawehde8072
Mac owners can finally use these Atmos sweeps:
www.macrumors.com/2024/07/03/macos-sequoia-supports-hdmi-passthrough/
Exellent, thank you. I've heard yoy talk about Atmos channels being louder in some cases. This depends on your receivers layout. For example, there is a volume difference in the Atmos channels for a ceiling layout vs an Auro 3D layout. Receivers account for this difference in layouts by applying different volumes to each layout. If you measure an Atmos speaker directly (nearfield) it's much louder than all of the other speakers, however, if you measure in the MLP, then it measures normally.
I'm glad these work with VLC Player, I appreciate your dedication and hard work.
There's a dialnorm setting in Atmos files which instructs the encoder how to align volumes of all speakers relative to center channel and it's different for Film, Music, etc. (there's even Film light and FIlm standard sub settings). I created these sweeps with the lowest possible dialnorm setting at -31dB which should remove all sorts of volume variations between channels but I still get surrounds about 1.3dB lower compared to REW's own sweeps. I guess (and believe) for best results all calibration should be done with the played sweeps so as to keep up with what the Atmos encoder will do while playing an Atmos movie.
@@ocaudiophile what volume level stops dialnorm kicking in? In dbfs?
I think it's always there :)@@hdmoviesource
thanks for this, it worked like a charm with the PC with JAVA driver. could not figure it out on the MAC but probably a setting in the VLC player I need to figure out. It was great to measure all channels in REW to include wides and in-ceiling that i had never had the ability to do in the past.
Glad it helped!
I think that speaker resonances can make the treble and bass higher in some cases. I might be sweeping my speakers at too high a volume. Going to run some tests today.
Thank you for sharing this! I've learned som much from your videos and my
experience with 5.2.4 have never sounded better.
Great to hear!
I am looking for some help from someone who has been able to play these tones from their height channels. I have tried many ways but just cannot get the height channels to to play. The sounds ends up coming from bed layer speakers. The input signal though on the denon avr shows PCM which does not show the height channels active. Could that be the issue? If so, how do I get hat to change to Atmos? Anyone has any ideas? @ocaudiophile
@@Rayman-expertsoundpro Do you have the atmos app installed on pc and atmos for home theater setup?
@@andrewmcewan9145 I do now. Just figured it out yesterday. I couldn't make the Atmos sweeps work in a MaC. Thanks for the reply
@@andrewmcewan9145 do you by chance if the Dolby access subscription is per device? So if I change my laptop, I will have to purchase again? Thx
Hey OCA, is it possible for you to create a full range pink noise for all 16 channels and the point one channel, that plays pink noise all at the same time in Dolby Atmos? Does Davinci Resolve allow you to place a full range signal in the LFE channel?
I've shared M-noise files for all Atmos channels. They've even better crest factor than pink noise.
This could be a huge help to someone has can afford an AVR that has per channel EQ adjustability. My AVR only has tone controls, but I'm glad to have that some AVRs don't.
Thanks for posting this OCA!
Hahaha! Measuring accurately matters even if you cannot do much about correcting it.
@@ocaudiophile Fact!
I sent you an email about some subwoofer potential issues.
Hey OCA, do you know if the -3db sweep on the subwoofer channel, the roll off effect phase? Is it best to do phase alignment in REW or are the sweeps okay for subwoofer alignment?
The Atmos subwoofer sweep is better for time alignment because it embeds the original Dolby low pass filter @120Hz in it which adds a tiny time delay but since this delay is also applied to the LFE channel by the Dolby decoder in the AVR during movie playback, timing of the sw will be more precise. You should use the latest TrueHD lossless Atmos sweeps btw, as I know you're also a bit OC like me ;
Have you updated the sweeps? Should I download them again? Do you have links?@@ocaudiophile
No, I didn't see the comment was under this video from my phone. The ones linked here are the latest and the best.@@hdmoviesource
@@ocaudiophile okay, thank you 👍
Do you thing these are better for time alignment than 256k sweeps? Are 1M the best?@@ocaudiophile
Hey, just wondering, what is the best length for measuring subwoofers? 4M? Are longer sweeps always better for subs? The subwoofer test tones you've provided, are they better than REW? If so why? Thanks.
If you have the time, 4M length will yield the highest signal to noise ratio. Also the louder the better for SNR. But multiple 4M measurements is a bit too heavy on the PC and may slow REW down. I generally use 1M for accurate measurments and even 256k is enough to create adequate filters in silent rooms.
REW's files are in .wav format so they are lossless, too but there's a lowpass filter at 120Hz and a slight delay in Dolby .mlp file which is also applied to Atmos movies by the encoder so they will be a more realistic representation of your LFE response during Atmos movie playback. Frankly, I doubt there will audible differences at these low frequencies though.
Thank you, great response.@@ocaudiophile
Can dial norm have an effect if I sweep at 65, 75 and 85 db? I measured 3 times at these volumes and the results are slightly different.
I wouldn't expect that. DId you turn off Loudness management - a menu setup item that shows up only during during Atmos playback?
@@ocaudiophile yes, I'll test today with REW sweeps at 65, 75 and 85db to check.
Hey OCA, quick question, which speaker is being used as reference timing ? and whats the dbfs volume these are set as ? im trying to setup my dolby height speakers but i need to do the time aligntment correctly aswell, as iv measured my other speakers in rew with center as the reference, but for some reason, with the front top left, there is a massive delay of 46ms when i run this file and check the impulse graph. ( other top speakers area roughly inline ).
Actual acoustic timing reference is Center and volume is -12dbFS. There's a REW reference wave file that already has all this information.
Good morning
Is this method valid for calibrating the channels of a soundbar? samsung hw-q990c
Yes!
What volume do you use to record the test tones? -1dbfs? That would be the maximum I would go.
They're produced from -12dBFS standard REW generated wave sweeps with -31 dialnorm setting for Atmos rendering for minimal dialog normalisation effect.
I see, thank you.@@ocaudiophile
Hey OCA, I've calibrated my entire system with your sweeps in Dolby Atmos, and they sound amazing. I did the same thing using REW sweeps; it doesn't sound as good. Do you know why? Also, when I play an REW sweep, and then I play your sweep on the same channel, there are slight differences even when smoothed to psychoacoustic. Is it something to do with being played in Atmos instead of multi-channel 7.1 or because it's 24bit/48? Are REW sweeps 24bit/48 or 16bit/48?
I'd like to EQ my subwoofer with your sweep, but do you think I should correct for the -3db slope? Because if the sweeps are better in all of the other channels, I'm wondering if the subwoofer would be better with your sweeps too. I need to figure our how to compensate for the -3db difference after 80hz.
I experienced the same in my system especially with Atmos movies. My guess is that the DSP processor in the AVR is applying some subtle volume changes depending on the "dialnorm" value it reads and since the sweeps also contain a dialnorm value in them, the calibration is more accurate.
The effect is even more noticeable with the subwoofer because Atmos LFE sweep has a low pass filter at 120Hz embedded by Dolby which introduces a certain delay. With the sweeps, your time alignment takes care of that. With REW LFE sweeps, timing will be a liitle bit off when used for playing am Atmos track although it might be spot on in the measurements.
Yeah, I'm not sure if it's dialnorm or what, but the result is much cleaner, and music and movies sound better with your files than REW. REW sounds dry and the treble doesn't sound as good as when I EQ with your files. Unfortunately, I just wasted an entire day calibrating with REW sweeps. I'm only using your files from now on. The difference is obvious.@@ocaudiophile
I continue to struggle in getting the sweeps to play from the Atmos speakers. I have tried it on a Mac and a windows 11 PC but no luck. The height sweeps come through the bed layer speakers. Anyone has any idea on how to trouble shoot?
Hey OCA, when you pass through with VLC Player, are there any other settings that change the sound? Like, for example, Enable time-stretching audio? Also, the gain settings, do you know if any of these have an effect when audio is passed through to the receiver? My thoughts are that they don't have an effect when you passthrough to a receiver, but I might do some testing just to check.
I only change device to "windows multimedia device output" and "enable hdmi passthrough" over the default VLC settings.
Okay, thanks@@ocaudiophile
Thanks, I download the original .mkv file
Great
Do you have a utility to convert .mqx files to REW .mdat? would make measuring all channels easier.
Also, what would be the proper way to make repeated corrections? meaning you create a measurement from filters for the purpose of MQX target curve on excluded measurements, measure the result and say it needs further eq, so you create another measurement from the second eq, and then apply that to the first filter you created... how? multiply? vector?
Check the links in this tutorial:
czcams.com/video/LwORN-tSPjko/video.html
Yes, you can combine filters by AxB trace arithmetic
Is timing best with no calibration file on the mic, a 0 degree on the mic or a 90 degree on the mic?
REW is only applying mic calibration after the sweep is completed so I don't think that will have an effect on timing. With USB mics, make sure you tick adjust clock with acoustic ref in preferences and timing will be as good as an analogue mic.
@@ocaudiophile okay thanks 👍
Can we use REW on the Mac with this multichannel TrueHD mkv? I have decent parametric equalization for my 9.2.4 processor. What UMIK microphone should we use?
I don't have a Mac. DD+ didn't work on Mac but mkv or mpl could. Try and let us know.
Hi OCA, These measurements sweeps are great. The front wide channel sweeps, however, seem to have the respective side surrounds engaged as well. The rest of the channel sweeps are great. I tested this using the level meters on my Trinnov where 2 channels light up when playing the wide channel sweeps. Also, any chance that you could increase the time between the channel sweeps? Alternatively, it will be great if REW just had a mode where it just stayed in measurement mode and auto-incremented filenames based on the start/end of the acoustic timing reference.
İ did not test front wide channels specifically as I don't have them in my system but they were produced in the sane way as all the others. I'll double check.
There were also others who asked for that kind of automation from REW. I will raise that demand with John and see if I can convince him to add that.
I also noticed this. I wasn't sure if it was the sweeps or my Denon receiver not being able to separate the Wides.
Do all these sweeps have the same problem?
drive.google.com/file/d/1YjQmnqq9slHruUGekggkVn8chk1mHjjS/view?usp=sharing
drive.google.com/file/d/1lGFGkomIuUJ56SdOFW5y8k7ahIIZCGRH/view?usp=sharing
drive.google.com/file/d/1YTQ8Wq-Moc0Xe8uyljPcDSY0mrau9agL/view?usp=sharing
Any chance you'll make a vid for tuning a car stereo with REW and DSP?
I couldn't find any DSP engine which can process FIR filters for car audio. Simple IIR EQ can be done easily with REW auto-eq though we'll need multiple point measurements.
@@ocaudiophile I see. I've found several very basic guides for RTA EQ but I figured you might have put your special, highly technical, spin on it. Thanks for the reply
Hi OCA; can I use these sweeps to also measure my Auro3D-Setup, because in your last video you mentioned that Auro3D can not be measured with REW?
A subscriber told me there's a way to measure Auro 3D by switching to a certain mode but I don't have Auro and cannot confirm. You will need to check video comments and find it (probably under the Auro video).
Hi OCA, thank you for your answer, but unfortunately i didn't find what you mean (which video do you mean?)@@ocaudiophile
Optimize your Immersive Audio: Atmos and Auro 3D calibration for Mac/PC using Audyssey measurements!
czcams.com/video/aZ4k04uAf2o/video.html
If not this one then should be under Audyssey A.R.T video
Hey OCA, are those sweeps going to be better than running a full range RTA measurement with pink noise?
RTA is good to obtain LF response in an area in the room but you lose high frequency response resolution.
@@ocaudiophileOkay, good to know. Another question, would it be best to use these sweeps for measuring all my speakers in 8 locations and replace the "Response Data" in the .ady file in json editor. Then EQ to a target curve below 500 Hz and above 500 Hz and enter that in the "customTargetCurvePoints"?
Response data in the ady file is always replaced with a Dirac pulse (perfect speaker) to convert CustomTargetCurvePoints to filters. That's the basic idea in all these videos.@@mikeortiz2139
@@ocaudiophile Ah, I see. I'll be trying to calibrate this weekend. Thank you for all this.
Hallo,
ich versuche es jetzt mal auf deutsch; Muttersprache ist einfacher und ich glaube Du sprichst auch deutsch, oder!?
ich habe jetzt nämlich alles mögliche probiert -soeben sogar den AVR (Denon X4800H) komplett resettet-; aber immer wenn ich in REW mit den Sweeps messe sind alle 4 Surroundkanäle um ca. 12-15dB leiser als die Frontkanäle (habe vorne: FL/C/FR/TFL/TFR und SL/SR und benutze TFL/TFR für meine Surround-Heights).
Wenn ich mittels 'from REW' messe ist das nicht der Fall; irgendeine Idee woran das liegen könnte, bzw. was ich da falsche mache?
Bin so dankbar für Deine Videos und versuche die Methoden auch anzuwenden; es klingt auch wirklich echt gut, aber auch beim Nachmessen sind die Surround-LS halt wieder um diesen Anteil leiser. Danke im Voraus und Grüße
Sie müssen "Loudness Management" deaktivieren, damit der Receiver die Lautstärke nicht auf der Grundlage der Dialnorm-Einstellungen dimmt (ich glaube, Denon nennt es "Bass Control"). Das Problem ist, dass diese Loudness-Menüpunkte nur vorübergehend während der Atmos-Wiedergabe verfügbar sind. Informationen zu diesem Thema finden Sie im Audyssey ART-Video.
@ocaudiophile
In the VLC settings, is there a difference between HDMI/SPDIF Passthrough Enabled and Enabled (only AC3/DTS) ?
I only get Sound passed when enabling the second option.
Is the device set to "Windows Multimedia Device"? Btw, if you're using a mac, they cannot pass pcm over HDMI and AC3 is probably playing a downmixed non-Atmos version.
@@ocaudiophile
Yes, it is set to "Windows Multimedia Device".
Running Windows.
Are there any specific Windows Sound Setting to be configured?
I believe HDMI passthrough bypasses all Windows sound settings but I am not an expert on VLC. I use just these two settings on default VLC and it always works. Maybe make sure everything is set to 48kHz sampling rate?@@sayfuandsmile7302
gonne take another look at the sampling rate on the weekend. It was greyed out at the laptop but set to 48k and if i remember right 16bit, couldn t do a change.@@ocaudiophile
hi again.
Just gave it another try. No chance getting the files properly played through vlc.
Meassuring with internal rew sweeps just works fine.
Could you be so kind and take a quick look at my settings? I ll provided u a googldrivelink with screenshots
drive.google.com/drive/folders/1HSJmoaw9nf-34zkIgA7ep3cVmvbIeeDg?usp=share_link @@ocaudiophile
hi, very much impressesd the way you bring content/tutorial, interested to know about yourself what u do, what u studied, how u make scripts for audyssey, u just made me one step higher in audio calibrations, waiting for car audio tuning with helix dsp
It's in the pipeline! I am in finance albeit kind of jobless these days but have an aeronautical engineering degree. I use chatGPT for the scripts.
Hey OCA...just a couple of simple questions pls...
1. Are these *Creating EQ filters* methods same as methods of EQ filteration shown in the videos---- *Measuring Height Atmos Channels and Measuring Atmos Manual Callibration*--- in these videos you manually enter the Graphic EQ generated data by Optimasing gains into your receiver for each channel upto 16000.....
Q2. What is the difference in manually entering the data(such as speaker distances,speaker levels,crossovers,graphic eq filters etc.) into the receiver and creating target curves for each speaker and then exporting that data as adv file thru multi eq editor app into the receiver???
I hope both my questions are clear to you...
Reply soon...thanks😊
I think i already replied to your question under Supreme Audyssey video comments ;)
Thanks!
Cheers!
Hello, i have a question and i hope you can help me even if not related to this video.
In some newer yahama av reciver ther's no more parametric equalizer(peq) like in my rx-v6a, butonly a GEW equalizer that permit to only change the gains like in marantz/denon from -6 to +6. Only in high end models they kept the peq. So my question is if i want to equalize my measurament of speakers with rew, how i can obtain the correct q factor to apply the gain correction like a denon? Thanks.
I don't know, needs to be tested. It took me quite a bit of work to find out Denon/Marants Q values. But there's a standard so I guess you can go with the Q values of Denon/Marantz.
Awesome Thanks for this.
Am I correct in assuming that these new losses files will give better REW measurement results than the previous files you provided?
Correct, especially in the high frequencies. And more importantly, they will not be effected from receiver's internal dialnorm/loudness management settings.
I just sent you an email about the subwoofer sweeps.
replied!
Thanks.@@ocaudiophile
Hi OCA, what about the LFE channel, can this be used instead the REW sweep or is there still a reservation? Thanks
Every channel is identical at -12dBFS REW measurement setting. TrueHD LFE has a lowpass filter and the response is -3dB lower at 120Hz also adding about 1.7ms delay (60cm). But I guess Dolby Atmos movies are also applied that filter in the decoder so you might consider using that for calibration rather than REWs own.
Surround channels are also about -1.3dB lower and that must be the effect of the "Film Light" Atmos setting despite -32 dialnorm applied to the sweeps which should remove any decoder normalization effects. I would assume height channels would be similar. Again, since all movies you will be watching will be applied the same adjustments, you might wanna use played sweeps for every channel if you'll only watch Atmos movies in your system.
My Windows audio drivers are a bit buggy at the moment after all the gizmos I've done in my PC to produce these sweeps so it might be a problem specific to me but I couldn't get the sweeps played when using Java EXCL drivers in REW. Only ASIO drivers work with VLC media player and they need to be turned on and off (the old method) if you will switch between REW's own and played sweeps.
Lastly, make sure you turn ALL kind of loudness management OFF in the AVR. Some settings only show up during Atmos playback and will immediately disappear upon pause!
Hey OCA, got another question concerning level matching after calibration. I used the atmos demo you provided with the supreme video (if i remember correctly) to get the levels equal to 75db. I am using my Umik and of course REW. Use z weighting and slow. When I adjusted every speaker to lets say 75db and measure afterwards with REW (Java Excl) I found out that I miss around 5 db from the subwoofer, the graphs falls off around the XO frequency by roughly 5 db. When I change the sub level by this amount (5db) and remeasure it seems to be a relatively flat line. What do you think? Should I leave the levels adjusted with the atmos demo or add a few db to the sub to get a smooth line? Thanks Sir.
The random pink noise in that demo is full range (0-24000 possibly) and to get the true loudness of the sub, the pink noise should be in the range 20-120 or something. And subs yield 2-3dB different results each time you measure with pink noise. For speaker, I rely on REW's auto target level but with a sub that's also not easy. Use 1/1 smoothing and level the responses with the other speakers. That's what I do but I also find myself playing with sub level regularly during movies.@@saschawehde8072
Thanks Sir. What do you mean with REW auto target level, check levels in the measurement screen?
@@saschawehde8072 No in the EQ window.