Dolby Atmos Height Channels Measurement & Calibration with REW

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Optimize your home cinema system with your receiver's calibration microphone and equalizer. This is the first ever tutorial showing how to measure and correct Atmos height channels with Room EQ Wizard. Optimal speaker and subwoofer time alignment also included. No prior calibration experience necessary.
Resolution: 1440p (sorry for the low contrast in the video, it's my failed attempt to screen capture in HDR)
Please keep reading, important information below....
Timeline:
00:00:00 Introduction
00:01:46 Receiver Settings
00:03:01 PC (Mac) & Microphone Setup
00:04:34 REW Settings
00:10:50 Speaker distance measurement
00:22:46 Measuring the “Atmos” channels
00:27:40 Speaker time alignment with “cross correlation”
00:33:36 Preparing the measurement for correction
00:38:36 Optimized Speaker Equalization
00:40:19 Marantz & Denon EQ settings
00:46:02 Volume level alignment **
00:53:06 Subwoofer timing & volume alignment
Links mentioned in the tutorial:
REW multichannel setup instructions:
www.roomeqwizard.com/betahelp/...
Accourate free trial:
www.audiovero.de/AcourateTria...
Acourate Microphone Alignment Tool Instructions:
www.audiovero.de/acourate-wik...
ASIO4ALL latest windows drivers (2.15):
www.asio4all.org/
Pyton script to automate most of the workflow in this tutorial:
github.com/jzahraoui/multeq-i...
REW Atmos Channels Sweeps & Marant Denon EQ Filters download link * :
drive.google.com/file/d/1APNO...
REW Early Access version used in this video:
www.avnirvana.com/threads/v5-...
* I have updated the EQ filter in the above link such that it will use different Q factors for the last two EQ bands and gain steps will automatically be optmized in multiples of 0.5dB same as the recievers do so no need to round down/up and the optimization will be a better match!
Full details of the Marantz / Denon graphic equalizer filters (Q factors of the last two EQ bands are different than shown in the video (1 octave) - it seems they have taken some shortcuts due to 32kHz internal processing)
Configurable PEQ
Enabled Control Type Frequency(Hz) Q Factor
1 TRUE Auto PK 63 1.41
2 TRUE Auto PK 125 1.41
3 TRUE Auto PK 250 1.41
4 TRUE Auto PK 500 1.41
5 TRUE Auto PK 1000 1.41
6 TRUE Auto PK 2000 1.41
7 TRUE Auto PK 4000 1.41
8 TRUE Auto PK 8000 1.15
9 TRUE Auto PK 16000 0.53
** You cannot use REW's "Check levels" for Atmos channels. Playing test tones (also pink noise) from the receiver is useless as it bypasses any correction (Audyssey or manual). So, here is a ".mp4" file that can generate 9.1.6 pink noise to adjust all speaker volume levels with the correction active:
download.dolby.com/us/en/test...
***10dB SUbwoofer SPL level difference is coming from the Dolby LFE channel boost standard. If you send a signal to a sub channel with the highest frequency lower than 250-300Hz then the level will be boosted by 10dB. For normal range (20-20,000Hz) the SPL level will not be boosted.
****If you can't see the chirp in the impulse response, it's because your system has no crosstalk between channels (cleaner than my system). In that case, you need to meaure the distance from your centre speaker to LP manually, key it in and then follow the video instructions for the rest of the speaker distances. Luckily almost all receievers have that problem!
Acknowledgements:
I want to express my gratitude to the genius behind Room EQ Wizard, John Mulcahy who not only made this great software available for free but also relentlessly optimizing and supporting it round the clock all these years.
Special thanks to "thothsong" of AVNirvana who kindly produced the Atmos sweep files for me.
"home theater system"
"home theatre setup"
#roomcorrection #atmos #calibration #hometheater #audiophile #audyssey #cinemasound #dolbyatmos #dirac #heightchannels #macatmos #5.1.2 #7.1.4 #9.1.6 #crosscorrelation #subwoofer #subwoofertest #graphicequalizer #equalization #equalizer #filters #microphonesetup "audyssey multeq xt32" "audyssey einmessen" "audyssey multeq-x" "audiosciencereview" "audyssey multeq editor app" "audyssey calibration" "dolby atmos test"
#minidsp "minidsp 2x4"

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28 июл 2024

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Комментарии : 353

@AdryDoic 7 месяцев назад

the scary thing is on how many so called Gurus and Experts and Pro installers not show anything nearly like this in their tutorials of how sounds best Audyssey and Atmos 🤦🏻... you really spitting Big Facts ! the funny thing is everyones Ears knows this listen to Audyssey that there's something wrong a long time ago.. but wasting time for 1000 of hours to get a weird thing working 😂 like in many other techniques and jobs Humans do .. just thru basics right and work on no BS ! you are my new Hero 🔥🙂💪🫵

@ocaudiophile 7 месяцев назад

Make sure you also watch the more recent tutorials, I've made many improvements on the techniques lately.

@AdryDoic 7 месяцев назад

⁠⁠@@ocaudiophilefor sure now you are my daily bread 😬

@FriendOfaCoolFriend Год назад

I’ve been using REW for 10 years. I’ve had 3 homes with theaters and I tuned all of them. Following your steps as well as the downloads you made available. Everything finally clicks and makes more sense. I will be able to take what you have shown me in your videos and expand on it. The impulse response, the optimize to target curve, all of it. I cannot express how thankful I am that you created this content and I somehow found it. The surround field of my 7.4.4 system has never sounded better or this pinpoint accurate. My wife even listed to some of the test movie scenes we use and she said quote “I was preparing myself to come up her and tell you how great it sounds because you spent so much time this weekend, but I’m serious…this sounds way better and there is a difference”. She and I both are hearing details in scenes we haven’t heard before. Don’t get me wrong, my prior configurations were not bad by any means. This guide simply took my system to the next level. You deserve all the credit that will come from you producing this content. I hope it comes. You deserve it. Sincerely. Thank you for this.

@BhavikPatelhr Год назад

Truly agree with you 👍

@charlesking678 Год назад

When the people who don't care about audio, comment on how good it genuinely sounds, that's the most sincere form of flattery. My son could care less but told me how good my truck (I'm into sound quality car audio also), after a good rew tune. Made my day.

@Xperie Год назад

This is the best channel on RU-vid for guides on using REW. Thank you for the amazing content!

@philipppaulk Год назад

I have been using REW for years now and I am still amazed that there is stuff to learn from other people workflows. Thanks man!

@hdmoviesource Год назад

Great video. You can get closer impule responses by using feet. A meter is 3 feet. However, you get closer accuracy using feet because 1 foot is smaller than 1 meter, and changing the measurement by 0.1 in feet is much smaller than using 0.1 when using meter. Also, the Mutl-EQ-X app can improve distances because you have even more granular control using the app.

@totalplonker824 Год назад

Even though I've only watched the first 10 minutes, I've subscribed! That's because I'll be coming back to this video once I've finished my acoustics.

@heimkino5698 Год назад

Dear OCA Thank you for this great video. I have been looking for an advanced rew instruction for many years. And now even with the possibility to measure the atmos channels :0) Thank you very much and greetings from Belgium

@weilerhot Год назад

Outstanding video. I’ve been over so many REW videos and none cover atmos, and the vast majority are about trying random values until things look good. REW has the science to give an accurate answer… but REW is too hard for a novice. And then this video solves it all by giving expert guidance, and using built in features of REW to mathematically get an accurate answer. I’ve been in a REW wilderness for years and this has unlocked so much. I’m amazed how few views and comments this has given how good it is. I’ll do my part to promote it. Thank you.

@ocaudiophile Год назад

Thank you. I think the subject is too technical for the majority of youtubers or maybe the presentation just doesn't invoke youtube algos. If it's any relief, I have learned a lot about signal theory from a couple of great and old channels (all listed in my playlists) and they don't have many subscribers either. I don't expect any monetary benefits from these videos but if some audiophile out there is looking for a good tutorial and they are not being shown these videos, this of course is a bit disappointing.

@coyotecoyote245 Год назад

@@ocaudiophile Downloaded the beta but can't figure out how to measure in the impulse graph? Do I need to activate something? Always get message: Metrics are not available for this graph Do you have any idea?

@ocaudiophile Год назад

@@coyotecoyote245 CTRL + Mouse right click and drag

@mushin111 Год назад

This is amazing. Didn't even realise I could change receiver settings on a web browser - so much quicker. Also great tip about playing Atmos content to unlock the GEQ adjustment for all channels.

@ocaudiophile Год назад

Thanks

@DanielCollins Год назад

Thanks for this! Really looking forward to trying this method.

@ellisba1 Год назад

Brilliant video. I'm setup a 9.1.4 Atmos studio and found your Information very informative . Thanks.

@ocaudiophile Год назад

Glad it was helpful!

@user-pd9bh5he3v Год назад

Thank you for this wonderful and unique content.

@ocaudiophile Год назад

Glad you enjoy it!

@luckyyluck 7 месяцев назад

I cannot give you enough thumps up, this tutorial is genius! Thank you so much!

@ocaudiophile 7 месяцев назад

Glad it helped!

@phred593 Год назад

Thank you very much for sharing this wonderful content. Very helpful!

@ocaudiophile Год назад

You're very welcome!

@austinpritchard997 Год назад

Great video.. Thank you edit . Just finished time aligning everything and unbelievable. Atmos and Surrounds sound incredible.

@ocaudiophile Год назад

I have just updated the .req equalizer configuration file in the link and now it uses 0.5dB gain steps exactly like the receivers so REW optimization will be even better. Also please read ** addition in the comments section!

@austinpritchard997 Год назад

@@ocaudiophile I noticed the Q values changed in your new file. They used to be all 1.414. I thought the Q values were static on the receiver?

@ocaudiophile Год назад

@@austinpritchard997 correct! Another hardware quirk from Matantz/Denon. Read my comments under the video.

@austinpritchard997 Год назад

So which is correct, what you have in the comments or what the EQ Filters file has. They are different. Your Comments 1 TRUE Auto PK 63 1.41 2 TRUE Auto PK 125 1.41 3 TRUE Auto PK 250 1.41 4 TRUE Auto PK 500 1.41 5 TRUE Auto PK 1000 1.41 6 TRUE Auto PK 2000 1.41 7 TRUE Auto PK 4000 1.41 8 TRUE Auto PK 8000 1.15 9 TRUE Auto PK 16000 0.53 EQ File 1 TRUE Auto PK 63 1.374 2 TRUE Auto PK 125 1.260 3 TRUE Auto PK 250 1.542 4 TRUE Auto PK 500 1.542 5 TRUE Auto PK 1000 1.374 6 TRUE Auto PK 2000 1.455 7 TRUE Auto PK 4000 1.455 8 TRUE Auto PK 8000 1.455 9 TRUE Auto PK 16000 1.414

@ocaudiophile Год назад

@@austinpritchard997 the second list is definitely wrong, I've no idea how it is in the download link. I'll check ASAP

@AeroPR 4 месяца назад

wow. what an amazing video! Thank you!

@ocaudiophile 4 месяца назад

Glad you liked it!

@NeemGiri Год назад

Your voice is so good, The English you speak sound so sweet. I am trying to understand REW from your videos.

@ocaudiophile Год назад

Thank you so much!

@ferdinandbardamu3945 10 месяцев назад

Thank you for these videos!

@ocaudiophile 10 месяцев назад

My pleasure!

@NeemGiri Год назад

Thank you very much, I learn lots of from your video👍

@ocaudiophile Год назад

You are welcome!

@ahmadieb Год назад

this should be most viewed video about atmos calibration :D

@ocaudiophile Год назад

Unfortunately, accurate and rare info doesn't convert into more views in RU-vid. My most viewed video is a collection of royalty free electron microscope photos which took me 10 minutes to put together :)

@ronniechowdhury3082 Год назад

One minor improvement you can make is, if you have an external amp, feed the full range l&r mains signal through minidsp (preout) and apply the full parametric eq + delays to the mains and the subs. You can then bypass the limitations on the marantz.

@lalithpodduturi9811 Год назад

Can you help me how to do it??

@PoesAcoustics Год назад

I appreciate what you have put together in this video. I did want to make a correction. You mentioned that you know that Audyssey and Dirac do not do frequency dependent windowing, that they cannot. Neither publishes data on how their algo's work, so you don't know that. However, if you read Dirac's white paper and understood how these room corrections work, you would likely have figured out that they do use windowing, and that it is frequency dependent windowing. A simple clue to this fact is that a related correction, Trinnov optimizer, has a window width button to change the windowing for different sized rooms in their optimizer. Dirac doesn't give the end user such control but is doing the same thing. These corrections are likely a lot more advanced than you may realize. You cannot equal what they are doing using simple tools like MiniDSP and REW. They are mixed phase and rely on FIR. They are making both frequency and time domain corrections. They are separating the direct and room response components in their correction. They don't have the benefit of our knowledge of the room and the speakers, so they don't always do the right thing, but their processing is far more sophisticated than anything even the best of us can do.

@ocaudiophile Год назад

Thanks for your comments. Audyssey does "frequency warping" to be able to concentrate correction where it's needed most as all it has is a total of 1024 taps to correct everything. This is very different to frequency dependent windowing and causes FIR filters act like IIR filters so it's not even real FIR. Dirac is more sophisticated and really uses a mix of IIR and FIR filters but they don't to spatial averaging with cross correlation for multiple measurements. If you know about signal processing and can compare measurements and results, the methods they use are quite easy to decipher. Trinnov has a very special 3D mic with advantages compared to a normal mic so I wouldn't comment on them and frankly, I never had any experience with them. With REW and/or rePhase they can all be "massively" surpassed. Firstly, because as you've stated, you can customize the correction for your room and system. But more importantly because these tools are a lot more powerful in every way. From the number of taps possible, to the resolution of measurements, vector arithmetic, phase alignment tools, type of filters and what have you that they possess. In fact, if you watch my videos for example on inversion and virtual bass array you will have an idea what is achievable with manual DSP. The problem is these receivers do NOT open their convolution engines to users but keep them in the monopoly of these automation companies. All you get for manual calibration is an ancient 9-band graphic eq (not even PEQ) with 0.5dB min steps and not even a subwoofer equalizer is included in the case of Marantz & Denon. It's hard to understand that as it would only require a software update at zero cost on their end. If you wish, send me your measurements and if you have access to a DSP engine of some sort in your system (could even be your PC), I can prove to you how much better a manual correction would be ;)

@BuffSquadBigBenni Год назад

@@ocaudiophile Very interesting. Did Matthew ever respond to this?

@ocaudiophile Год назад

@@BuffSquadBigBenni I don't know who's Matthew but noone responded to this.

@BuffSquadBigBenni Год назад

@@ocaudiophile Matthew Poes (Poes Acoustics) :) Too bad. Could have been interesting. He is very knowledgeable.

@SiredbyFire 7 месяцев назад

Good info Thanks for this

@ocaudiophile 7 месяцев назад

Glad it was helpful!

@davrous Год назад

Really awesome video! It's the best one I've found by far. Now need to watch it several times slower ;) I'm watching it because I've got a Stormaudio ISP16 MK2 with Dirac ART and some "pro" calibrators keep telling me they can do better with a manual calibration than auto with Dirac which I'm super skeptical about. I'm then going to follow your great methology and compare. So far, the calibration done by Dirac seems great when comparing to what you're doing. I've done 13 measures at different places and Dirac uses it to average the correction like in your tutorial. I would be curious about your feedback.

@ocaudiophile Год назад

ART is a tough one to challenge 🤔

@sammywonks404 Год назад

After lot of struggle I finally realized this will not work on macbook. Among many other things, the concept of calculating distance using overlays is not available on mac unfortunately which is the key here. I wish you could make another video for mac owners. Having said that, really appreciate your efforts here - learnt a lot

@ocaudiophile Год назад

Thanks. If you cannot see the chipr in the Overlays/Impulse window, it's not becasue of Mac. There's a note under the video regarding that. Also , check out the follow up video to this one to measure distance without the chirps.

@sammywonks404 Год назад

@@ocaudiophile its that but also the ability to calculate distance is also not available

@ocaudiophile Год назад

You will need to manually measure one of the speaker's (the one you use as the acoustic reference speaker) distance to the mic. It doesn't need to be very accurate. All other speakers will be accurately aligned relative to that speaker with the impulse peak measurement technique.

@alesquabe135 Год назад

Many thanks for these REW tuto on your channel!! About Multi measerment with the UMK-1, what is max distance do you recommend to measure from the main listening position? example of 1 row with 3 seats?

@ocaudiophile Год назад

You can (and should) measure everywhere including and between head (ear) positions of the people who will sit on each side. You can take more measurements around the centre seat to give that position a higher weighted average if you wish.

@dirkdudeck1449 9 месяцев назад

Many thanks for your Tutorial, always a great job 👍 It would be great to get also the corrected 90° file for the UMIK 2

@ocaudiophile 9 месяцев назад

Thanks, noted!

@guyadam650 Год назад

Thanks for such a well put together video and all the technically detailed information. I've gone through this process many times before but not with anything like this level of detailed knowledge so I'll recalibrate my system using this information. Just one question though on the subwoofer output, my processor (Emotiva XMC-1) will attenuate the subwoofer volume by about 10dB when crossed over with the channels (at 80Hz for example) so if you match the sub volume level with the other channels (at 75dB for example) then run a measurement sweep after blending the sub with the center channel (or any of the other channels) then (with speakers set to 'small' now) the volume below 80Hz will be lower than the frequencies above the crossover point. How can we fix this as if we increase the sub output by 10dB to compensate then the LFE channel will then be 10dB to loud. Even if using miniDSP with multi subs (which I will be doing in the very near future) I don't see how this problem can be addressed. I realise you have mentioned this issue in your video but I couldn't see how to correct for it. Many thanks

@ocaudiophile Год назад

Luckily, 10dB is such a large difference that one cannot unhear it if it's there. I don't think SPL is dropping below the XO frequency but rather sub volume is too low for LFE channel. The latest "early access" version of REW has LFE specific sweeps to deal with this problem, no longer fiddling with AVR bass settings required.

@satorizero5448 Год назад

Love it

@ocaudiophile Год назад

Thanks!

@seanhuang5104 5 месяцев назад

This is by far the clearest tutorial i have ever seen. Thank you very much for the effort. When aligning sub with the center channel, it show distance of 12 meters, which is out of adjustment range for my denon avr. But the sub is actually just right beside the center and about 3 meters from listening position.May I know how to solve this?

@ocaudiophile 5 месяцев назад

The delay setting reflects the delays caused by the inner filters (crossover, etc) of the subwoofer and is always going to be the higher than the actual acoustic distance from the LP. although 12m is a bit too much (unless you have additional equipment in-between like a MiniDSP. Make sure any internal processing is turned off in the sub if any. Unfortunately, the distance limit with the closest speaker to the LP and the subwoofer cannot exceed 6m in Sound United gear. You can try to align to an earlier impulse peak of the sub which is sub-optimal but is still usually better than what Audyssey would do.

@seanhuang5104 5 месяцев назад

@@ocaudiophile Thank you , I will go over the setting again to verify.

@theatremad9797 4 месяца назад

I have the Audyssey pro kit (not the app)with the pro mic and I use it. How does my method compare with REW as in this video.

@poornakaranam3375 Год назад

After the Harmon curve update i am planning to do this complete calibration. Thanks a bunch for taking time and doing this for us. can you please let me know if UMIK1 is good enough? will there be any advantage of using UMIK2?

@ocaudiophile Год назад

You're welcome! Umik-1 is more than enough, no need for 2.

@joek6207 Год назад

Love this!

@joek6207 Год назад

Around 19:40, MQX allows more refined values. Curious if it’s accurate but it certainly allows more than the standard UI

@joek6207 Год назад

I had no clue how to do atmos channels!? Very cool!

@ocaudiophile Год назад

@@joek6207 Also Audyssey / Dirac use FIR filters (REW EQ filters are IIR) which are more powerful

@joek6207 Год назад

@@ocaudiophile looks like at the 48 minute mark it converts PEQ to FIR filters. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rBUPQ-x46bw.html I’m trying to find the resolution for the FIR filters. Also, one near thing with MQX is I can enter values without taking ANY measurements. So all of the measurements can be taken in REW and MQX can have them uploaded/entered

@madsrasmussen2236 Год назад

Hi. Thanks for a great video with good explanations. Unfortunately I experience isues with the REW Atmos Channels Sweeps - the ones for Top speakers are directed to SL/SR or FL/FR. What am I missing here? My AVR is a Denon AVR-X4500H with a TRL+R as Pre-out to a Yamaha RX-A1010 set in stereo mode. Rgs Mads

@ocaudiophile Год назад

Probably, you have not selected your reciever as the default player in WIndows/Sound settings.

@steveaidt6138 Год назад

I have been measuring distances. The center channel keeps showing 9 feet on REW when the physical distance is 14.5 feet. The Audessey measurement shows 14.6 feet. In fact, any speaker I do on REW measurement shows a distance shorter than actual distance. Also, the chirp peak is easy to see for the center channel but very difficult to see for the other speakers. I don't know if there is an incorrect setting but I set everything according to your video (I think). Any suggestions?

@ocaudiophile Год назад

Probably what you see is not the chirp but something else. If you can't see the chirp in the impulse response, it's because your system has no crosstalk between channels (cleaner than my system). In that case, you need to meaure the distance from your centre speaker to LP manually, key it in the AVR and then follow the video instructions for the rest of the speaker distances. In the video following this one, I have explained how to adjust speaker distances without the chirp: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-J7mToOXTt-o.html

@simonpercivall Год назад

Thanks! Again, great! Just a question: You did a series on how to use the MultEQ Editor and the JSON it produces to create very specific corrections to both the issues of Audyssey and to the room, yet in this tutorial you seem to prefer the pretty limited graphic equalizer and no bass eq (except through more equipment). Why? Is it because it's less work than measuring twice with different mics and transferring JSON in and out through the app (and through Excel) multiple times? Or is it because you wanted to create a walkthrough that was more generic than for just the D+M world? Or is the result actually better in your experience?

@ocaudiophile Год назад

To get the best results from Audyssey requires a lot fo technical work. Manual equalization is far easier for average user and sounds almost as good as the best of Audyssey. Of course you compromise low volume listening and you need a way to eq your sub. I keep preset 1 for audyssey and 2 for my manual calibration.

@simonpercivall Год назад

@@ocaudiophile Thanks! That brought the missing piece of clarity I needed. I hope you continue doing these videos, I haven't seen this level of insight anywhere else.

@LordAvenger999 Год назад

OCA, this is just fantastic. Well made. Thank you. Quick question, once the distance measurements are entered in the website, does it have to be corrected for what I have read elsewhere as the D&M distance bug in older models, which internally offsets the delay setting by a tiny amount?

@ocaudiophile Год назад

No, just enter what rew tells you is the distance of your speaker's impulse peak.

@ocaudiophile Год назад

These receivers have processers which can do accurate discrete fast fourier transformations. Do you really buy that they're unable to apply the correct speed of sound to a division?

@LordAvenger999 Год назад

@@ocaudiophile well, there is a thread on this topic in AVSForun covering it extensively. Apparently, the anomaly was identified via comparing how Audyssey calculated delays from distances vs what the REW impulse response provided as distances. Hence the question. If after all the REW values are punched in the Marantz 8012 uses 300 m/s for calculating distances, we are off again. What has been your experience and thoughts on this?

@LordAvenger999 Год назад

I meant to say "300m/s to calculate delay from distances", not just distances. My apologies.

@ocaudiophile Год назад

@@LordAvenger999 Why would you need to calculate the actual delay?

@BuffSquadBigBenni Год назад

I've been told that you need to set LFE in the receiver to 250 (and not 120) when measuring the "full bandwidth" of the subwoofer.. or else the receiver will low pass filter the response and you will not get the correct measurement of the subwoofer. Of course it should be set back to 120 after calibration. Thoughts on this?

@ocaudiophile Год назад

LFE channel response during a REW measurement is independent of the "Speakers / Bass" settings be it "LPF for LFE" frequency or "Subwoofer mode" in my experience with a Marantz SR6011 & SR6015. However, the receiver will add a boost totally dependent on the frequency range measured due to Dolby standard of 10dB boost applied to the LFE channel. "Audio / Surround Parameter / Low Frequency Effects" which is at 0dB by default needs to be changed to -10dB to measure the correct response level if you are using a limited frequency range like 0-250Hz for your sub. If you're measuring full range (0-24kHz), you don't need to do that.

@holgerschever6321 Год назад

Hi there, great video!!! I am not sure if i missed it, but in the beginning you usually set the level in the Avr of one reference speaker (Fl e.g.) by the avr test noise to 75 db and use then the measured SPL of that speaker as level reference. Then we do a basic leveling of REW with pink noise for the right measurement headroom. If we measure some speakers with the atmos files, is it bullet proof, that these spl curves match the basic leveling of REW?

@ocaudiophile Год назад

First of all, we start from reset values in the AVR, everything 0 dB. Then adjust AVR volume such that REW before measurement pink noise check is around 70-75dB and "same" for all speakers. Note that you can't do that for Atmos speakers. Equalisations applied during the process will change every speakers SPL and you need to recalibrate with REW pink noise one more time at the end. For optimal results and also to be able adjust Atmos channels, you can use "match response to target" levels under the EQ window. I've comments on that in the description section under the video. Playing all channels from files (not only Atmos but all) will also be more consistent in terms of source SPL.

@holgerschever6321 Год назад

@@ocaudiophile Just to understand if i get it right, the spl curve by the atmos files is not correct shown with its level? If i measure an atmos curve and then change the level in the avr and measure the atmos curve again, its not following with vertical movement accordingly?

@ocaudiophile Год назад

@@holgerschever6321 I am sorry I couldn't understand your question. You should not change the volume of your AVR between measurements though. The played .mp4 files might have different SPL than your REW's own production sweeps so I suggested using .mp4 files for every speaker, not only the Atmos channels.

@spiroszaharakis2648 Год назад

I have an audio interface (Arturia MiniFuse 1) and a Superlux ECM999 measurement microphone. Can I use those? I guess I will have to change some of the first settings as I will be using a sound card right? Or just use the Audyssey mic instead?

@ocaudiophile Год назад

I'd go with the ECM999. REW manual has extensive information on how to measure with a sound card.

@TheBarbapapa1234 Год назад

At 14:20 you point out the little chirp. Im zooming in and out, but the chirp is nowhere to be found on my measurement. Any idea?

@ocaudiophile Год назад

Please check the description under the video...

@user-hw5if7si3m 6 месяцев назад

I've tried playing the atmos channels and they play out of the correct channels, but the volume is really really low in comparison to the normal REW sweeps. Playing the test tones dolby file plays much louder. Is this expected for these height channel sweeps to crank the volume to get in line with the REW sweeps, or should the volume be in line with the REW sweep levels initially and my AVR is trimming them? Also, when doing height channels, do you keep the mic at 90 degrees still or horizantal and use the other calibration file?

@ocaudiophile 6 месяцев назад

Turn off loudness management on your receiver. The menu is only visible during Atmos playback on most models.

@SkyCyberguy Год назад

AWESOME Video! Gonna try this right away, just ordered a UMIK-1. Could you also provide Test Tone Files for Auro 3D/DTS:X-IMAX-Enhanced, specifically the Voice of God and Height Center Channels? I'm using a Denon X8500H in 7.2.8 configuration and, depending on the sound format, it switches between speaker layouts. It would be a shame not to be able to calibrate the two missing channels above to the same degree of perfection...

@ocaudiophile Год назад

Thank you. Unfortunately, it's quite hard and complicated to produce these Dolby Atmos sweeps without very expensive software licensed only to studios. I haven't seen or heard of a method to do that for Auro/DTS-X and Imax yet but you can be sure I will be the first one to post a video with them if someone finds a way.

@teb76 Год назад

Is there a way to produce a .wav file of a sweep from REW including time reference chirp? I'd like to measure the response after the correction using ROON

@ocaudiophile Год назад

Sure, you can use REW's "Generate" window to save a wav sweep with chirp.

@stylepg7728 Год назад

Hello, thank you for the very useful sharing. I have two questions: 1) EQ processing, should I use psychoacoustic smoothing or no smoothing? 2) The subwoofer alignment time should be aligned to L+R or C

@ocaudiophile Год назад

1. Psychoacoustic smoothing after frequency dependent windowing for 15 cycles 2. L, R & C & the sub should all have their impulse peaks at the same time, ideally at t=0

@saschawehde8072 Год назад

@@ocaudiophile, no matter what I try, I cannot allign my subs to t=0, as I was able to do with all other speakers (5 bed layer, 4 Atmos speakers). The delay, REW is showing is way above what I am able to enter into my Marantz 7706 processor. Does it makes sense to delay the other speakers to the first sub peak, so that all are arriving at the same time? Thank you Sir.

@ocaudiophile Год назад

@@saschawehde8072 You can try that, the surround effects will be accurate, only the size of sound bubble will grow larger than your room possibly. There must be some processing going on in your subwoofer channel signal path which causes the extra distance. You can also try aligning a lesser peak of the sub (there's always one or two before the highest peak) with the rest of the speakers

@saschawehde8072 Год назад

@@ocaudiophile thanks. You mean that there might be two tiny peaks before the first huge one? I double checked and found two tiny peaks before the first big sub peak, both are right hand side from the t=0 from reference. So I increased distance using the first tiny peak so that it matches with the reference. Now I will need to give it a listen. Thanks for the hint and by the way, keep doing that great stuff. Did not found a better guide so far.

@lano3827 3 месяца назад

When measuring the speakers, do you need to have them set to large so that it measures the full 20-20k on the speaker rather than the crossover being active? Then once aligned and eq’d add the crossover back into the processor?

@ocaudiophile 3 месяца назад

Yes, Large and with Audyssey turned off, 0-24000 Hz btw.

@crazydwarfer 9 месяцев назад

Hello again. I have followed your videos very closely and also implemented every bit of your advice. I measured each individual speaker in my 5.1.2 system, and all of them sound crisp and the best I've ever heard them. There is only one caveat to this. I fail to setup the subwoofer so that it sounds the same as when I enable Flat/Reference MultEQ setting in my AVR. When I turn MultEQ off, and when Graphic EQ is enabled the subwoofer really sounds anemic and underpowered. Do you have any advice on that? Kind regards.

@ocaudiophile 9 месяцев назад

Unfortunately Marantz/Denon do not let user to apply GEQ to subwoofer which is a shame IMO. You can use a sub with its own EQ, add a MiniDSP or go for an Audyssey setup where sub will also be custom filtered. Check the Audyssey ART video for the latest tools.

@coyotecoyote245 Год назад

Hi, thank you for these great tutorials! I have some questions: 1. when I measure as explained by you, I don‘t have the cross align button in REW? 2. Also in overlay at impuls I can‘t measure distance and get a message on top if the graph that measuring is not possible in this graph? 3. will you also do a tutorial for REW and MultiEQ-X? Would be great because here all the filters can be imported… 🙏 😃

@ocaudiophile Год назад

You need an early access version of REW. Google for it. I didn't understand 2nd question. I'll soon launch a multeq-x video.

@coyotecoyote245 Год назад

@@ocaudiophilein your video you‘re measuring the distance between the impulse. in my version this is also not possible… I‘ll google directly for this version.😊

@torbenjunget9976 6 месяцев назад

Persistance pays off - the manual calibration as per your tutorial clearly gives best results yet, listening to the base layer of my system - thanks for a great (albeit very dense) walkthrough. I have one problem though - no matter what I do I can't get the WMP .mp4 files to be reproduced by the height channels, only through the L/R channels. And this is unaffected by the playback mode of the AV receiver. I have a 5.4.4 system - Denon AVR-X4400h / 5-channel poweramp / miniDSP HD, the files are played on a Dell laptop via the HDMI output. I read all the prior comments, including your replies, and have tried all the suggested remedies - but without success I'm afraid. Any suggestions?🙂

@ocaudiophile 6 месяцев назад

Did you try VLC player with HDMI passthrough option ticked and WIndows DIrect Drivers selected?

@torbenjunget9976 6 месяцев назад

No, not yet - I will try, thanks @@ocaudiophile 👍

@torbenjunget9976 6 месяцев назад

VLC player did the trick - great! Now I just need to level match all speakers & time align the subs to the rest of the system 👍 Thanks for your help, keep up the great content. @@ocaudiophile

@ChadAV69 4 месяца назад

Hey, OCA. The atmos sweeps aren't playing through my atmos speakers. Could the HDMI length from computer to AVR be the problem? The sweeps just play through my front left or front right speakers respectively. Thanks. Edit: Nevermind. I read the thread that Thothsong is in about REW and Atmos on AV Nirvana and I saw that it doesn't play through atmos using Media Player. You have to use WINDOWS Media Player (not JUST Media Player).

@ocaudiophile 4 месяца назад

VLC player also works great!

@BhavikPatelhr Год назад

OCA, can you please make video on how to measure surround speakers

@ocaudiophile Год назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-J7mToOXTt-o.html

@e4superfly 3 месяца назад

Ok im a complete novice once you've done all this how do you upload it into the reciever?

@wisdompvdom3978 Год назад

nice

@ocaudiophile Год назад

Thanks

@SkyCyberguy Год назад

Any Idea why I almost never get the chirp displayed in measurement curves, to define the distance? The only channel I sometimes get it is the center channel, and even there only once in maybe 5 or 6 measurements. And even then the distance it's indicating is wrong, it shows something around 1,5m, but my center is more about 2,65m away. I'm using a UMIK-1 and set everything as you showed. I even tried setting "Ref level trim" to higher than 2 dB, but then REW tells me it's too loud or something like that... 😞

@ocaudiophile Год назад

Read the description under the video ;)

@paulsmith3440 Год назад

I also don’t see the chirp in the graph, tried different versions of rew also java and Asio, I’ve asked on AV Nivana ,brilliant work though thank you, I had a response from John , That's because it isn't there to see, the impulse response does not contain the timing reference. The t=0 position of the impulse response is where the timing reference was detected. ….. so it sounds like there’s some confusion, anyway tape measure it is for the first measurement

@ocaudiophile Год назад

Thank you! Yes, you don't see a chirp if you don't have crosstalk in your system. There's a note about it under the video in descriptions!

@coyotecoyote245 Год назад

Downloaded the beta but can't figure out how to measure in the impulse graph? Do I need to activate something? Always get message: Metrics are not available for this graph Do you have any idea?

@ocaudiophile Год назад

You want to be in the SPL & Phase graph for metrics: www.roomeqwizard.com/help/help_en-GB/html/graph_splphase.html#metrics

@user-hw5if7si3m 6 месяцев назад

Unsure why, but I can't time align my Atmos channels correctly. When running the sweeps, REW reports they need to be adjusted by -12 feet, despite them currently at a distance of 6ft. If I switch my config to 7.1 from 5.1.2, and I time align them as surround back, they are perfect. Wondering if this is some built in delay or bug with Onkyo and ATMOS. Have you seen this behavior before?

@ocaudiophile 6 месяцев назад

No, sorry.

@user-im3yk3or2r Год назад

Hello OCA, like many others who have commented let me thank you for posting such detailed tutorials on how to chase better sound in one's home theatre. I have just stepped into the 21st Century with a new Marantz AV receiver and am pleasantly surprised by how much opportunity there is to configure these devices (compared to an amp from 20 years ago). I am however a novice still. If you were to recommend one of your videos to start with (I have been watching a few of them of late), which one would you recommend? I would like to calibrate my receiver for home theatre with a 5.1.2 configuration. I found the Audyssey calibration somewhat lifeless. Secondly, as a Mac user I am encountering some issues. Have any of the other subscribers come across the issue of where their Mac's don't allow a signal to be sent through the AV receiver to the relevant height channel? I was working through this particular video, and all was going well until I got to that point where the played signed is sent to the atmos channel and found no signal is being sent there at all. I am sure the problem lies with the Mac sound card and not anything to do with the AV receiver.

@ocaudiophile Год назад

Thank you. You're right about Mac, users couldn't achieve to play the sweeps from height channels. There're only expensive third party software solutions as far as I know. You can switch banana plugs at the back of the receiver such that when you play a a left speaker sweep, it plays from the height channel. You'll get the correct response but adjusting speaker distance will require some extra calculation. I'm working on a new video in which measurements are extracted from the app and no extra REW measurement will be necessary. This will sort out the sweep problems with Mac and Auro 3D users. It should be out this week.

@user-im3yk3or2r Год назад

@@ocaudiophile Thank you for the quick reply OCA, much appreciated (I should have picked up on swapping the banana plugs). I have subscribed to your channel and look forward to the new video when it comes out. In the mean time there is still lots to take in from your other tutorials. Whilst I had read about REW and have taken some measurements your tutorials demonstrate how it can be used to set up your home theatre - I've not seen that before. One additional question, I have noticed that others use the REW measurement tool to determine if they need to "treat" their room i.e. with sound deadening and that seems to be another factor taken into consideration when calibrating one's system. Is the assumption with your approach the one's room has a basic configuration that doesn't have any significant issues that would prevent the manual calibration from correcting it?

@ocaudiophile Год назад

High frequency treatment requirement depends on the speakers, some speakers like reflective rooms to perform their best. Low frequency treatment is too bulky and often not as effective as digital filtering the lower the frequency dealt with. I am more on the side of DSP.

@aecsummer 5 месяцев назад

Awesome video! I was able to get the bottom seven bed layer speakers time aligned with ease but I can't get the atmos speakers to work at all. I disabled the ASIO and ran the files provided. It ends up just playing the bed layer speaker closest to the atmos position played (play TFL, FL speaker plays ect). Any idea? I have tried using Dolby Atmos for home theaters on my PC as well as using different things like VLC. No avail. Help? Lol

@ocaudiophile 5 месяцев назад

There are various causes of that but eventually everyone manages to play them correctly. I've mentioned some causes in the following video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-J7mToOXTt-o.html Also, you will find lots of causes and solutions in the video video comments.

@aecsummer 5 месяцев назад

@@ocaudiophile excellent, I will watch this one as well and see what I can figure out! 🙏

@oddkjetil1030 2 месяца назад

Does anyone know what q factor Onkyo reciever use in their manual eq?

@ocaudiophile 2 месяца назад

I don't but it's very common to use 0.707 or 1.414 (square root of 2 or half of it)

@BhavikPatelhr Год назад

Hi, in my yamaha I have configurable 7 band GEQ following with 63hz, 160hz, 400hz, 1khz, 2.5khz, 6.3khz and 16khz. What should be the Q Factor to obtain the correct Gain and filters.

@ocaudiophile Год назад

You should select generic eq type and then "configurable PEQ" where you can enter limits specific to your receiver. Q is flexible in Yamaha's as far as know so REW can optimize both the gain and the Q factors for all 7 bands.

@BhavikPatelhr Год назад

@@ocaudiophilethanks for your prompt response....I am learning REW with help of your videos... great work...keep it up

@macuggladale Год назад

When i play the files supported thru WMP the sound is much lower so REW cant fint the chirp. How to fix this?

@ocaudiophile Год назад

Turn Loudness Management OFF in your receiver settings!

@crazydwarfer Год назад

Thanks once again, another question here. As we cannot do Check Levels on height channels how do we volume align them? Are there pink noise files, same as sweeps? Thanks.

@ocaudiophile Год назад

Dolby has Atmos pink noise test tones for download: download.dolby.com/us/en/test-tones/dolby-test-tones_9_1_6.mp4 download.dolby.com/us/en/test-tones/dolby-test-tones_7_1_4.mp4

@crazydwarfer Год назад

@@ocaudiophile Thank you so much. Found that already.

@ocaudiophile Год назад

You can see quite clearly from fdw:15 physcoacoustic smoothed responses of speakers if any of them needs volume offset.

@joshmajzner3234 Год назад

Is it normal that I am now listening closer to reference on receiver after doing this? -- It does sound a lot cleaner and defined but I am now playing at a much higher receiver level but it doesn't seem as loud.

@ocaudiophile Год назад

The graphic EQ filters must have applied an overall negative dB to your speakers on certain frequencies which probably had excessive peaks before calibration so up to -20dB of volume drop (in extreme cases) is normal.

@joshmajzner3234 Год назад

@@ocaudiophile indeed I had cuts from 3-8.5 db on quite a few areas. Just interesting how much I generally listen -20 but now -10 seems to be the ideal listening volume. Appreciate the time you put into this video series.

@bobbiebreese9377 Год назад

Can you do a video using this method with Audyssey MultiEQ X? You can import REW measurements into MultiEQ X.

@ocaudiophile Год назад

I don't have MultEQ-X, I use the app

@bobbiebreese9377 Год назад

@@ocaudiophile Great Video.!! Can’t wait to try your methods!

@BhavikPatelhr Год назад

How to measure Surround speakers? I am getting sweep tone from both surround speaker in a same time while using ASIO4ALL. Should I match it with center speaker?

@ocaudiophile Год назад

You should always measure one speaker at a time. If two speakers are active during a measurement, you wanna check your REW, ASIO and receiver settings.

@BhavikPatelhr Год назад

@@ocaudiophilehanks for the reply. But can you please guide what settings to be check in ASIO and REW? I've checked and all looks like ok. Should I physically disconnect speake from avr?

@ocaudiophile Год назад

All settings required are listed in the video. I don't have much to add. There's a complimentary video to this one and also a DOlby Atmos Music video. These two all use these settings. Maybe watching them can help you spot what you're doing wrong.

@meonk123 Год назад

Hello Sir, i need your help. I did exactly what you did to measure the timings. But sadly i am not able to see the first cherp in the overlay graph in impulse tab. Scaling etc. is the same as yours. I just cant find it in front of the impulse from the speaker. I was looking quiet some long time for a nice and easy guide, how to measure and set the timings for the speaker. I am realy happy about your nice guide. Thanks for help and a happy new year.

@ocaudiophile Год назад

In some systems with no crosstalk between channels, you cannot see the chirp. I explained how to align speaker distances without the chirps in the complementary video following this one: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-J7mToOXTt-o.html

@meonk123 Год назад

@@ocaudiophile Tahnk you for your fast reply. I habe a Denon 4500 and a umik1, so should be very similar to yours. I will check the other video.

@ocaudiophile Год назад

It's actually a design flow, some of these receivers have crosstalk between left and right channels. In fact, you're lucky your Marantz is a clean one (mine is not) but you'll need to manually measure the distance of your acoustic reference speaker.

@meonk123 Год назад

@@ocaudiophile Thank you so much. Your other video helped a lot. All my speakers are now nearly perfect time alligned. Besides the suboofer. I allready set the distance to 7.80m, but the sub ist still too late. I am not able to set more distance on the sub. Is it possible that the position of my sub is here the probleme? It stands right next to my couch. On the other side of the room to the center speaker. More or less, all surround and atmos effects are now so nice, clear und accurate. Its awesome.

@ocaudiophile Год назад

@@meonk123 do you have minidsp? That or some other processing in the sub must be causing the extra delay. Try aligning for an earlier impulse peak even if it's not the highest peak.

@kalaimani7354 Год назад

Hi. I have followed your videos and time align all my speakers including Atmos. I used Java and there is no problem. My question is. 1. After set the Grafic EQ do I always ON this Set Up? 2. Is this will effects if I On Cinema EQ? 3. If I Switch off the Grafic EQ is the setting will be different?. Thank you.

@ocaudiophile Год назад

Graphic EQ can only be turned on when Audyssey is turned off. GEQ will be in effect as long as it's on. I'm not sure if cinema EQ option is available when Audyssey is off but I don't see why it shouldn't be. You can switch GEQ on and off. The EQ filters will be kept intact.

@kalaimani7354 Год назад

Ok. Noted. Thank you very much for the Powerful Videos. ❤

@Thekolbes Год назад

I’m having a weird problem with timing between the the LR channels and the C and surrounds. The LR channels’ impulses are about -21 ms away from the center 0 point when center is the timing ref. I cannot figure out what’s causing the latency in LR. I have the approximate tape measured distance set in the AVR. So there shouldn’t be a 20+ ms difference. Center and surrounds are correct. I have a Marantz SR6014, which I think has most of the same features as yours sans the presets. Previous audyssey measurements had the correct distances. I’m measuring with a umik1 and using a Mac through hdmi. Any advice?

@ocaudiophile Год назад

Sounds like some digital processing delaying the front channels

@ocaudiophile Год назад

Or every other channel but the fronts

@Thekolbes Год назад

I can’t figure out where the delay would come from. The Mac hdmi outputs an 8 channel pcm signal. I manually put in distances with a laser measure and will go from there. LR are consistently the same time off so I should still be able to cross correlate from multi positions. After the Atmos manual setup, I’ll have to redo my FIR convolution filters for music. Do you suggest multi position measurements with cross correlation for the fir filters too?

@ocaudiophile Год назад

@@Thekolbes Time alignment is about getting the impulse peaks all at the same time so entering even the most accurate distances will not give good results if some speakers are delayed by the system for some reason. Especially true for subs with minidsp for example. Are your front speakers active speakers by any chance? Btw, if it's 21 Ms then we're talking about 7m differences, if it's ums then it's less than 1cm which is beyond the distance setup capacity of these receivers. They can't get below 3-4 cm accuracy by design. Multiple point measurements are better to eliminate very location specific SPL fluctuations but to keep high frequency precision I'd recommend tightly spaced multiple measurements.

@johnwicker7783 9 месяцев назад

I'm having a strange problem here. I am using the EXCL Java driver. I can send audio to the TF atmos speakers fine, but when I sent the TR atoms files, the sweeps come out of my surround speakers. I verified all settings are correct with amp assign and still no luck

@johnwicker7783 9 месяцев назад

after restarting the AVR and trying another laptop. Sound is only coming out of the Front channels for Atmos sweeps. I just can't seem to get this right.

@ocaudiophile 9 месяцев назад

Is your AVR in Movie/Multch-in mode?

@BhavikPatelhr Год назад

Hi, OCA, I followed all the steps as per the video but unable to find tip of thee accoustic reference peak on the left side of the impulse response. Can you please help on this.

@ocaudiophile Год назад

If your system is clean and doesn't have crosstalk between channels, you will not see the chirp. There's a note in the description area on that. The complimentary tutorial video explains how to get around that.

@BhavikPatelhr Год назад

@@ocaudiophileok, thanks for reply and making such great videos. You are one of my favourite contain creater in home audio....

@ocaudiophile Год назад

Your welcome!

@christiandickey Год назад

Awesome video for helping a novice like myself. My question is running the REW sweeps my volume needs to be -20dbs however, when I run the played sweeps from the download provided I have to crank up the volume to 0. Is this normal? Also don't see the cross correlation option.

@ocaudiophile Год назад

see comment below for RoughNeck 201

@erniegray444 Год назад

Of my 11 speakers, 6 have impulse peaks downward and 5 upward. The 4 atmos and center are all upward. I have a marantz AV8805a processor with 2 amplifiers. Center and atmos speakers are on separate amplifiers so that can't be the issue. The wiring is correct and the system has never sounded better. I'm not sure if I should ignore this or explore a fix? It seems like reversing the polarity would do more harm than good. The room is oddly shaped and the main listening position is off center, could that effect it? Thank you for this great series!!!

@ocaudiophile Год назад

Using different amps together is almost always the cause for phase reversal despiote correct polarity connections. It's harmless to have some of the speakers reversed especially if you like the sound but I would still give it a try and compare. The total impulse attack would be stronger with all speakers pointing in the same direction.

@erniegray444 Год назад

@@ocaudiophile I just thought it was weird that both amps have speakers going both ways. Example: fronts and Center are all on the same 5ch Monolith A/B amp, Fronts are bi-amped and down and center is up. Side, Back and Atmos on a 8ch Monolith Class D amp and again 4 up 4 down. Pre-Amp interconnects are all balanced. Speakers are all Aperion Audio. I'll fiddle with the LCR at normal and reverse C polarity and report back when I get some free time. Thanks again!

@erniegray444 Год назад

I reversed the polarity on those 5 speakers and that aligned the impulse peaks on all affected speakers. I should have tried a different channel to see if it was the speaker manufacturer or the Amplifiers. Didn't think of that until I already put the gear away. I'm not confident that it improved the overall sound but it certainly didn't hurt it. Compared to pre-alignment there is a noticeable improvement in clarity, particularly in soft/subtle dialogue. I used the JSON editor and Harmon Curve you provided rather than manual GEQ as I don't have a miniDSP for sub management and Audyssey did a great job aligning my 2 subs all on its own. I'm +/- 6dB from the Harmon curve from 20Hz to 20kHz with psychoacoustic smoothing, and could probably get it better with more accurate measurement. Would love to know how to use your technique to calibrate the Audyssey mic and then use them and the Harmon curve targets together in the JSON editor. If you could find the time to explain how to generate those numbers in REW I would GREATLY appreciate it! Thanks again for all your work, it has really improved my experience!

@ocaudiophile Год назад

Youi'll need a calibrated mic for that and you're right, I need to make a video on combining mic calibration with correct curves. In my experience, manual calibration with GEQ downright beats Audyssey when done properly but you'll lose low volume detail as Dynamic EQ & Dynamic Volume will not be available. If you manually adjust all your speaker distances and levels after a close distance Audyssey calibration with lots of curve editing, you can get good results but too much calibration also degrades the overall sound.

@erniegray444 Год назад

@@ocaudiophile I have a UMIK-1 but no MiniDSP 2x4HD for sub management, which gives me hesitation on the manual EQ. I saw a comment from your mic calibration video about multiplying the mic calibration trace by the Harmon curve. I am awaiting a USB adapter to calibrate the audy mic. I will do both a calibrated microphone and GEQ calibration and see if either is preferable with my system. A 2x4HD may be in my future! :) Thanks again!!! I also appreciate you participating in the comments.

@kewlbug Месяц назад

I used the impulse tracks last night with great success. Do you happen to have any other Atmos tracks?? Specifically pink noise for different pairs (non periodic) or just anything really. (I've recently grabbed the SACT kit for sale, with some disappointments)

@ocaudiophile Месяц назад

There should be atmos M-noise sweep links in one of the atmos video descriptions.

@ocaudiophile Месяц назад

M-noise is even better than pink for music

@kewlbug Месяц назад

@@ocaudiophile It's been a while, I had forgotten about M noise! I'll have to get up to speed on that again. thanks

@kewlbug Месяц назад

@@ocaudiophile Are you creating these atmos tracks? mkv,mp4,m2ts ?? can you point me towards how to make my own?

@ocaudiophile Месяц назад

@@kewlbug Yes, I used AWS media creator for mp4 (eac3) lossy atmos, the lossless true HD atmos sweeps (in another video) are created with dolby encoder and davinci resolve. Both processes are quite complicated.

@kalaimani7354 Год назад

Hi. I go through your video lot of times to make sure I understand the measurement technics. I have one question. The center channel measurement during the impulse. When I measure from the chirp to the center of the impulse it show 2 meter. But when i measure with measurement tape it actually 4 meter. So which one is correct ? Thank you.

@ocaudiophile Год назад

The chirp is actually caused by interference between channels and the mic (crosstalk) and is not present in most systems. But when it's there, it should show the very precise distance. Maybe in your case, you're seeing the distance between your speakers rather than the speaker and the mic. It's best to rely on what you actually measure with a tape. But remember to set the real distance in the receiver by applying 4m/343x300=3.50m

@kalaimani7354 Год назад

Hi . Thank you for the valueable information. Will measure back again.

@juanloya2239 Год назад

@@ocaudiophile I'd like to clarify this for Denon and Marantz AVR. If you use the same acoustic reference to time align other speakers and you can tape or laser measure the distance from the acoustic reference speaker to the microphone at the listening position, do you apply the speed of sound correction (measured distance x 0.875) and enter that value into the distance field for that speaker, or do you enter the actual measured distance? Since this distance is important to time align, I'd like to verify at least for Denon and Marantz what value to use for the actual distance so the AVR processes correctly. Also is it better to use Meters or feet ?

@ocaudiophile Год назад

@@juanloya2239 If you're setting distances from the receiver's setup menu, always decrease the actual distance by 300/343. If you're using Multeq-x, I hear it compensates for this after the latest update so use the actual distance. If you set REW speed of sound setting to 300, you can use the numbers you measured in REW directly in the receiver. Meter units are bit more accurate.

@juanloya2239 Год назад

@@ocaudiophile Thank you for responding. I already have a set of measurements for an atmos system on an SR8015. Setting REW speed of sound setting to 300 after the fact won't change any of those measurements, and I certainly don't want to rely on rounding errors and apply the 300/343 error correction to the speaker distance settings on the receivers setup menu. So it seems I have to redo the measurements after setting the speed of sound in REW to 300. Initially though I have to apply the error correction to the acoustic reference speaker tape measure value and enter that value into the distance field on the receiver's setup menu for that speaker. Well let's see if it makes a difference 🤦‍♂🤦‍♂

@SunnySkiesInAZ Год назад

Hello, I’m trying to follow your video. Everything I try to take a measurement with an aiso driver, I get crackling and popping. Doesn’t happen when I switch to Java. Any thoughts?

@ocaudiophile Год назад

sample rate mismatch somewhere possibly!

@SunnySkiesInAZ Год назад

@@ocaudiophile I don’t see where? Everywhere I look is 48k. I just ordered a different laptop with different sound card in it. A nvidia 3050 is what I’m using now. I can’t figrue it out?

@user-hw5if7si3m 6 месяцев назад

@@SunnySkiesInAZ This is more than likely interference from another app/service running that could use the video card. I had the issue with my RTX 4080. Make sure to close anything that could use it (i.e. afterburner, riva tuner, etc.) Also, check you startup services to see if anything is running in the background that could access your video card. If you uncheck the "Give exclusive mode apps priority" in the advanced sound settings, you may find you can't take control of the nvidia sound card until you close the app that has access to it. May help you find the culprit(s)

@tonywingmah Год назад

A little confused. With Asio4all I can see 8 channel. How do I send a signal from my computer to the ceiling speakers?

@ocaudiophile Год назад

You have to play the special .mp4 files I have supplied in the link below the video and measure with REW.

@tonywingmah Год назад

@@ocaudiophile Thanks, how were the files generated? Is there a pink noise version?

@ocaudiophile Год назад

They were generated in AWS mediacreater with some dolby tools. You can play pink noise sweeps for all channels with WMP from your PC with this file : download.dolby.com/us/en/test-tones/dolby-test-tones_9_1_6.mp4

@roughnek201 6 месяцев назад

OCA thank you so much for posting these videos. I've learned so much from your videos. Currently working through the steps here and the SPL levels when running the atmos sweeps are significantly lower than the sweeps via REW. I've checked and Windows Media Player's volume is at 100. Is this normal? REW is reporting that it can't hear the timing reference when running the atmos sweeps from the file. Should I use the files for all of my speakers vs REW's generated sweeps?

@ocaudiophile 6 месяцев назад

Check if loudness management is turned off in the AVR. The menu only shows up during Atmos playback and is on by default.

@roughnek201 6 месяцев назад

@@ocaudiophile okay I will check and let you know

@roughnek201 6 месяцев назад

Thanks OCA, I loaded up an Atmos disc and Loudness Mgt is turned off in the AVR. Should it be turned on?

@ocaudiophile 6 месяцев назад

@roughnek201 loudness, bass management or whatever name is in the menu should be off otherwise atmos channel volumes will be dimmed. But with certain older models, even this cannot help to bypass dialnorm settings in atmos files. There must be a link I posted in the past in the comments listing AVR models effected. There could even be one in one of the video descriptions, I can't remember.

@roughnek201 6 месяцев назад

@@ocaudiophile okay thanks for that insight. I'll look to see if I can find out if Denin x6300H is affected by that.

@cymonophori9998 Год назад

Ive a question for everyone please , ive my setup on a laptop all softwares downloaded. Ive a 7.2.4 setup. Unfortunately after setting the intial stuff under preferences im using ASIO, when i click on check level the signal in the graph on the left moving. Unfortunately i can mot head any sound. My Denon 3800 shows as "Denon AVR - HD audio Driver for display audio. Any direction is greatly appreciated y'all. God bless you for spending great time to do this OCA.

@ocaudiophile Год назад

You should select Asio4All as your driver and then select input and output channels in the ASIO control panel. If ASIO semmes too complicated for you, you can also use Java EXCL drivers for your receiver and microphone.

@cymonophori9998 Год назад

@ocaudiophile I tried the setup with ASIO4ALL, selected the input and output but still couldn't hear any output when checking levels. When I tried Java and selected DenonEXCL, It gave an error. I've tried with 2 different laptops HP and Lenovo to no sucess.😩😔😢

@cymonophori9998 Год назад

@ocaudiophile I've also tried to see if there's any other setup I need to do for multichannel setup on the laptop but I can't seem to find any. I followed the instructions by REW for multichannel but it really didnt show much like it does for Mac

@ocaudiophile Год назад

@@cymonophori9998 This is a basic REW setup problem and not related to the method and I think you can find lots of solutions in REW forums but when using Java EXCL drivers, you need to setup your receiver and Umik mic as default in Windows Sound settings. They should also be at 48kHz sampling rate, with enhancement disabled and exclusive mode given to other applications. Re-installing REW and using windows troubleshooter for sound can also help sometimes. DOn't worry, everyone gets it to work eventually ;)

@cymonophori9998 Год назад

@@ocaudiophile Thank you again. I will keep playing with it and also check the forums.

@kalaimani7354 Год назад

Hi . Morning. I have another question regarding - Speaker Time alignment with cross corallation. In my Theater Room I have 3 rows. Front/Middle/Black. Most of the time 7 people will watch a movie. Front -2 Middle -3 Back -2 My question is if I do the speaker Time alignment with cross corallation (I normally benchmark Center speakers during calibration) is this will give us seat to seat correct listening volume for all 7 calibrated seats?Tq

@ocaudiophile Год назад

All speakers will be perfectly time aligned only at the central seat. There's no way around that. However, with cross correlation, you will have the most uniform frequency response between seats.

@kalaimani7354 Год назад

@@ocaudiophile is there any way we can do that ? I mean seat to seat time align and same sound. Thank you.

@ocaudiophile Год назад

@@kalaimani7354 :) No, if a speaker is aligned for one seat, it will have to be too far or too close for another seat.

@kalaimani7354 Год назад

@@ocaudiophile You have mention "if a speaker is aligned for one seat" what you mean by this ? I a bit confused . So if I align all the 7seats is this possible ? or we can't do that?

@ocaudiophile Год назад

@@kalaimani7354 No worries, let me explain. Time alignment means setting up the receiver so that it correctly delays the sound from that speaker according to the distance between the speaker and the microphone position. So it can only be correct for one seat. A speaker can not be the same distance to all the seats in a room.

@domiz1x 6 месяцев назад

In the speakers distance, the first peak doesn't show. So I can't measure the distance from any of the speakers.

@ocaudiophile 6 месяцев назад

Did you select "%" for the y axis at the top left corner of the Impulse window?

@domiz1x 6 месяцев назад

@@ocaudiophile yes, but it doe not show anything. I know the distance of the speakers but when I do the measurement to check nothing show.

@msoles30 Год назад

How to use the GEQ equalizer for the sub to align with the front speakers GEQ frequency bands

@ocaudiophile Год назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ga2eOwJRtXo.html

@msoles30 Год назад

I have seen it but I'm still lost about the subwoofer geq settings

@ocaudiophile Год назад

@@msoles30 Unfortunately, Marantz & Denon don't have GEQ for subwoofer!

@msoles30 Год назад

Wow do you how for Yamaha geq sub

@msoles30 Год назад

The sub frequency geq is 63 and 160 and front speakers have the same band also so I'm kinda lost about that part

@stefan3602 Год назад

Yamaha has 7 bands of EQ. REW suggests 20 bands of correction. How do I narrow those 20 down to 7? Thanks for some epic material!

@ocaudiophile Год назад

Youcan configure REW'S Generic equaliser as required under settings icon when you select Generic configurable PEQ. You need the early access version of REW though

@stefan3602 Год назад

Okay, thanks, will give it a try. On another note: Asio4all is causing all kinds of freezing and stuff on my computer, while FlexAsio is super stable. Hopefully it’s possible to disengage FlexAsio the same way you do with Asio4all in order to allow streaming of those Atmos files you do.

@ocaudiophile Год назад

@@stefan3602 I never used Flexasio but I know it's compatible with REW and it should be possible to disengage it. Let me know if you run into problems.

@stefan3602 Год назад

Sure will! I’ve got everything setup now but can’t see the chirps from C or FL in the overlays IR. Even tried raising Ref level trim to 4 dB. So I went with some previous distances and after some further dialing in, managed to get them between 0 to +50 micro seconds. For some reason C is at 46 micro seconds, while FL/FR are at zero. This is with C as reference.

@ocaudiophile Год назад

@@stefan3602 This is normal, the distance steps in these receivers are not accurate. Also you will not see chirps in the impulse graph if your system is clean and there's no crosstalk between channels.

@_shogun_gaming_ Год назад

When i run the measuments, the speakers sometimes gives out a small crack or crakle or pop, or how ever you wanna name it, im scared it hurting my speakers? is it a bad wiring connection? is it because im measuring at full range and i only have small speakers? also im running a newer version of rew it has an "Capture noise floor" that i can tick and untick...which one should i use?

@ocaudiophile Год назад

Interrupted current causes pops and crackles in speakers which should be a loose or dirty connection affected by the vibrations in the speaker during a measurement. Full range measurements are harmless to a speaker as it has protection for frequencies it cannot produce. Capture noise floor is useful for the resolution of a measurement and should be ticked.

@_shogun_gaming_ Год назад

@@ocaudiophile ye i was afraid of that, i might have to change it the loose wiring screwing down method with some more solid "terminal tupes" is what we call them here in dk :)

@_shogun_gaming_ Год назад

thats propably why i kept getting very different readings doing multiable measuments from the same spot and speakers :)

@_shogun_gaming_ Год назад

@@ocaudiophile hmm.. I made New clean cuts to both ends of the wiring and changed it with terminal tups but its still crakling :( what else could it be?

@ocaudiophile Год назад

No idea, may be faulty speaker driver.

@lucasichelturco Год назад

hi there. Great video. Thx. It's a lot of info so I will study it more later. But wanted to ask you about the mic. I am in doubt if getting the Umik1 or Umik2. I would like to get the 2 for future projects (speakers diy etc). But I have seen people complaining about the 90 deg calib files being wrong and minidsp support not helping. Have you heard about this problem at all? Thx a lot for your amazingly detailed videos.

@ocaudiophile Год назад

The calibration files are per capsule module not per mic unit, not even for Umik 2. USB mics have clocking deviations due to their interface but REW is now taking care of that. Still, if you're serious about DSP, you should go for an analog mic with a mic amp. If it's for room correction with REW only, I'd go with Umik 1 for ease of use.

@lucasichelturco Год назад

@@ocaudiophile ok that rules out umik2 anyway. Thanks a lot. As for what I would like to do, there is a lot I need to learn still but I would really like to get into dsp. Can I ask you to suggest an analog mic and amp good enough for working on dsp? Thanks again and once again I really appreciate your channel

@ocaudiophile Год назад

@@lucasichelturco The ETF web sites has a link to a cheap but still quite good instrumentation microphone, which comes with an individual calibration file: www.isemcon.net/ It is built around the Panasonic electrect capsules (WM-60A and WM-61A) which can be used also to build a DIY microphone. Of course you won’t get the same quality of a professional instrumentation microphone, but it is enough to get good results. Some other good and inexpensive solutions are the Behringer ECM8000 measurement microphone (see www.behringer.com for details) and the Dayton Audio EMM-6: www.daytonaudio.com/index.php/emm-6-electret-measurement-microphone.html which is provided also with individual calibration files.

@lucasichelturco Год назад

@@ocaudiophile Sorry with my limited knowledge I do not understand what ETF web sites is. But I have managed to get a lot of good info thanks so much. It's possible to go from Behringer ECM8000 (Eur40) or Dayton Audio emm-6 (around Eur90) with appropriate audio interfaces (Motu 2/4, USB Scarlett 2i2 or PreSound 24c (from 100 to 250 eur). Or alternatively you can go for the higher end Mic/Interface with IsemCon 1750 costing 270eur and Motu ultralite-mk5 730Eur. I used the website of audiosciencereview for choosing according to their very accurate and extensive tests. There is one thing that really I can't understand though. Why is a USB mic less desireable than a XLR one if both communicate with REW through a USB port? Is it for the obvious reason that the ADC is way better in the audio interfaces than in the USB mic itself? Once again thanks a lot for all the info. Love the channel

@ocaudiophile Год назад

@@lucasichelturco USB interfaces have timing and jitter issues unless they use very expensive clocks but they are plug & play. Smaart is a professional DSP software and has quite extensive information on calibration microphone selection here: downloads.rationalacoustics.com/documentation/Smaart-Gear-Choices.pdf

@gtalexandro Год назад

I'm blocked to the first measurement of the center speaker. The time measured it's wrong: it say 1,47meters but the speaker is at 3meters. Audyssey measure it correctly. What can I do?

@ocaudiophile Год назад

Enter 3m for centre speaker distance, keep measuring and find other speakers impulse peak distances to time zero, subtract /add from 3m and set in. Once they're all around 0, fine tune by minor trials

@gtalexandro Год назад

@@ocaudiophile thank's. To do a fast test I've measured only 1 position and eq gains of the filters. The last 2 filters in the file uploaded they have different Q (not 1,414 like others), so I correct them to 1,414 and adjust eq into the receiver, with rew eq gains. My subwoofer have flat eq. After that I play tone test from the receiver and I set volume reference to the central speaker, with rew and umik I measure the spl from other speakers/sub to be at the same level. Ok now my first impression: the surround sound it's PERFECT, rear and front speakers now are one thing. There is only a problem: the sound is too light, voices from center also are harsh. I have used the curve in your video only to the speakers, not to subwoofer. What can I do for this light sound and lack of bass?

@ocaudiophile Год назад

@@gtalexandro Firstly, you shouldn't change the Q levels for the last two EQ bands. See my comments in the description above. After you do that, the calibration will change quite a lot. Let's see to the other problems if you still have them later.

@ocaudiophile Год назад

Also make sure, you have the latest downloads from the link. I have added a pdf instruction as well.

@gtalexandro Год назад

@@ocaudiophile ok, I have done the changes. I also eq better my 3 subs to be at same spl with the main, but eq them like in your video is very hard. I can't set the correct delay watching the impulse response of each sub, they are too much away in terms of millisecond, minidsp when I equalize them introduce some milliseconds of delay too. Do you have any tips? Anyway actually the sound it's AMAZING, never sounded better the scene of car race in Ready Player One. The voice and effect are little misaligned, like I need back the dynamic eq/volume shits, I need to take volume up but at night hours I take down the house 😅 thank you, your channel it's on top of youtube, you deserve more views

@gtalexandro Год назад

What file I have to play for Top Middle Atmos? I have only 2ch

@ocaudiophile Год назад

TML & TMR

@gtalexandro Год назад

@@ocaudiophile in the zip folder I've found only TFL,TFR,TRL,TRR 😔

@ocaudiophile Год назад

@@gtalexandro Sorry, I fixed it now. Try again!

@gtalexandro Год назад

@@ocaudiophile thank you!! 😍

@_shogun_gaming_ Год назад

no matter what i do i cant see the small chirp...looks like theres to much noise...im using the audessy mic in the back of my pc...oh and my marantz sr015 wont let my choose graphic eq on after i reset everything..

@_shogun_gaming_ Год назад

Just ordrer the umik-1 lets hope i can figure this out when it gets here..

@ocaudiophile Год назад

The chirps are only visible in certain systems with crosstalk problem. You will find instructions in the description about it and the complimentary video to this one explains how to align distances without the chirps...

@_shogun_gaming_ Год назад

@@ocaudiophile Should i still choose large speakers when doing the setup? my speakers are all small satelitte type speakers with targeted crossover at around 70-100 hz

@ocaudiophile Год назад

@@_shogun_gaming_ Yes, in order to check the speakers' own response ithout the sub involvement...

@BeFikarGaming Год назад

Atmos speaker filed gets played in l & r channel only what should i do to make it perfect

@ocaudiophile Год назад

AVR movie/stereo mode

@BeFikarGaming Год назад

@@ocaudiophile its on movie mode

@ocaudiophile Год назад

AVR is the default player in Windows /Sound settings, sample rate 48kHz, stereo mode (not atmos)

@BeFikarGaming Год назад

@@ocaudiophile do i need to select atmos mode from propeties?

@ocaudiophile Год назад

No just stereo

@teb76 Год назад

Opening the overlay window i should set the view to %, right?

@ocaudiophile Год назад

Yes and tick "plot normalized" if you want to see impulse peaks all at same size.

@teb76 Год назад

@@ocaudiophile I'm struggling to find the chirp... I cannot see anything on the left side from the peak (center cannel, peak downwards as yours, around 0ms)

@ocaudiophile Год назад

@@teb76 check your REW version, I added a link above for the version I used in the video. Lack of chirp signal in the impulse graph is related to some problem in your system set up though. Chirp has been there since many old versions of REW. A friend of mine also cannot see it in any of his measurements since months.. I'll let you know if I can find out its cause.

@teb76 Год назад

@@ocaudiophile I indeed recognized that I weren't using the same version of yours. I now ended the room correction for my stereo system, will do the surround another day and let you know

@teb76 Год назад

I couldn't use ASIO becuause if I set 48kHz the signal comes out corrupted, to hear it correctly I must set to 192 kHz but I can't do the measure because the mic works at 48 kHz. I spent the whole morning trying to fix this issue but there was nothing else to do than using WASAPI instead of ASIO

@bjoernfu Год назад

"and four wall lamps" 🤣

@ocaudiophile Год назад

:) you're the only one who got that joke!

@sammywonks404 Год назад

By the way, the Acourate Microphone Alignment Tool Instructions link provided in description doesnt work

@ocaudiophile Год назад

You're right. Thanks for reminding. I'll check and update.

@ocaudiophile Год назад

It's working today. It was probably a server problem on their site: www.audiovero.de/acourate-wiki/doku.php?id=en:wiki:funktionen:logsweep:microphone_alignement

@monkeyharper7687 8 месяцев назад

Can anyone else not see the chirp on their measurement?

@ocaudiophile 7 месяцев назад

Chirp is only visible if there's crosstalk between channels in the system. There's info on that in the description of the video.

@BuffSquadBigBenni Год назад

How come that this huge company with all their money, cannot detect all of these flaws and correct them? Boggles my mind.

@ocaudiophile Год назад

They have also done some cheap tricks with the graphic equalizer bands. Check video comments section.

@BuffSquadBigBenni Год назад

@@ocaudiophile they should hire you, or some other competent people :)

@christiandickey Год назад

After we have completed everything you have shown, do we keep mutieq off and set speakers back to small?

@ocaudiophile Год назад

Sorry, I don't understand the question.

@christiandickey Год назад

@@ocaudiophile upon the initial testing we turn off multi eq and set speakers to large for testing and calibration. Once we've measured everything and set our peq filters, do we then turn audyssey meqxt back on and change our speakers back to small? Or do we just run our receivers on manual everything? Is "reference" our newly calibrated receivers?

@ocaudiophile Год назад

@@christiandickey Audyssey should be turned off (not reference, not flat, not L/R bypass) in the receiver and you should only use the graphic equalizer.

@christiandickey Год назад

@@ocaudiophile thank you for the info 👍