Dolby Atmos Measurements & Calibration - REW & Audyssey MultEQ-X - Target Curves

Dolby Atmos Measurements & Calibration - REW & Audyssey MultEQ-X - Target Curves - Part 1

Рет қаралды 6,817

11 ай бұрын

I start calibrating my left and right front speakers with REW, The Spatial Audio Calibration Toolkit from ‪@joentell‬ and ‪@TechnoDad‬, and Audyssey's MultEQ-X Room Correction Software. I wanted to calibrate a system without using the internal test tones from REW. Luckily, we have a great Blu-ray Disc that archives this with full-range random pink noise, which is perfect for full-range measurements using an RTA in REW. I realized that this video was going to be long, so I think I'll split this up into parts, because I wanted to explain to you how and what I had to go through to lean this and achieve these incredible results.
This is using a new method of importing Target Curves using Audyssey's MultEQ-X. I'd like to shout to ‪@ocaudiophile‬ for giving me the idea that this was possible and I wanted to see if it would work with the new Audyssey MultEQ-X update that allows you to import target curves now.
Please let me know what you think in the comments, and if you have any questions let me know.
#REW #DolbyAtmos #RoomCorrection
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My name is Carl, I run a family-run business with my dad (Glen) and my brother (Mark) called HD MOVIE SOURCE. I love movies and all the tech that goes along with them. I love to talk about the quality of transfers a lot, it's an enormous enjoyment in my life. I love calibrating speakers, and subwoofers, encoding 4K content, sound, and anything techy. This is what I love to do. I'm also a big gamer with my brother and World of Warcraft also sucks up a lot of my time, LOL. Somebody has to do it right? Any questions please let me know.
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Пікірлер: 103

@JavonDGreen 6 ай бұрын

I have learned so much about calibration over the last few years. I’m close to calling myself very proficient. I watched every ounce of this and I agree with what you’re doing and the length of this video. You’re absolutely correct. This long Tutorial is needed to help get the curiosity questions answered. I’m so grateful that you did this for our community. Thank you for your work. Awesome video my friend. 👍🏾

@hdmoviesource 6 ай бұрын

Thank you Davon, much appreciated. I'll try and get back to putting out some more videos soon.

@TWISTEDBULLET 11 ай бұрын

WOW! Excellent video, this method is amazing! Thank you! The best sound I've ever heard.

@hdmoviesource 11 ай бұрын

Glad it was helpful! You're very welcome.

@andreass2422 11 ай бұрын

Impressed with your content. keep creating more.

@hdmoviesource 11 ай бұрын

Thanks Andreas, I hope you like it.

@FilipeMendeslr 9 ай бұрын

Congratulations, great video! Before MultiEQ-x added the functionality to import a target curve, I averaged it in REW and calibrated each speaker and used the average of the positions. The difference was that I used the REW equalizer to make the compensations and used some targets that I downloaded from audio science review (A collection of speaker target responses in .csv/.txt format). It actually opened up many possibilities for me, I'm a beginner in equalization and this helped me to have a sound that was much more controlled and close to what I liked to hear. After equalizing each speaker in REW, I imported the file into MultEQ-x. It's been approximately 2 months since I made some changes to my room, I had to reconfigure everything, I noticed the presence of the option to directly import the target curve. So I did, I imported a Harman curve which was the one I used and in reality it seems to me that I got a good result for the time invested. I want to try some other curves to see how the software equalizes, but at first the time savings in relation to the result seem quite interesting.

@hdmoviesource 9 ай бұрын

Yeah, it does take a lot of time to get a full system calibrated, and sounding good.

@cmdrloupy1183 9 ай бұрын

Amazing presentation, Its hands down, one of the best, and extremely informative videos I have seen, thx soo much

@hdmoviesource 9 ай бұрын

Wow, thank you! I really appreciate it. I'm working another version of this for mutli-measurement points. Do you use any room correction software CMD?

@cmdrloupy1183 9 ай бұрын

Hi, hope your doing well, I am only quite new to all this room correction thing, I have Audyssey X, Rew, umic-1and after watching your video, I now also have the spatial audio calib. software, But honestly, I havent really understood how to use it all, But thx to your Vid, I am understanding how its done, another cool thing is, my room size is nearly identical to yours, I have been trying to get a great sound out of my system for many years now, It looks like there is light at the end of the tunnel thx to you. I look forward to watching more of your video and hopefully soaking up more useful info. Cheers Peter

@hdmoviesource 9 ай бұрын

Thanks CMD, yes there's a lot to learn.@@cmdrloupy1183

@hdmoviesource 9 ай бұрын

Let me know how it goes CMD. @@cmdrloupy1183

@dad1foxwood3 10 ай бұрын

Thanks you for great video

@hdmoviesource 10 ай бұрын

Thank you, Foxwood, much appreciated.

@schemkesa 10 ай бұрын

Agreed about power for subwoofers to correct them with EQ. I've got a XLS1002 in Bridge mode (like a 1000W) for my passive SVS PB12 (because the plate amp was broke) now its sounds great (again) after calibration with Audyssey

@hdmoviesource 9 ай бұрын

Good stuff! Yeah, this app is incredible.

@joentell 11 ай бұрын

Hey, Carl! It makes me happy to see that you're getting so much use out of your Spatial Audio Calibration Toolkit! I see you've discovered something about Audyssey's MultEQ-X: the frequency response measurements taken by Audyssey are not to be trusted. Your measured response is more accurately matching your target response because you've bypassed Audyssey's measurements completely. You may have tried applying the target curve directly to Audyssey's correction, but you'll notice that the post-EQ measurement does not match the target curve. The reason is their initial measurements don't match what you would get with REW and a UMIK-1. Kind of crazy right?

@marktebbutt8052 11 ай бұрын

100% agree. REW for the work. MQX for the application.

@hdmoviesource 11 ай бұрын

Yeah, that is really interesting, that is crazy. I think the manual work that can be done with Audyssey is incredible, but I think the automatic stuff needs significant work. Just finished calibrating my entire system, and sounds amazing. I might be thinking about getting a more powerful receiver, but I need to start saving money, LOL. The 2023 high-end Denon receiver looks amazing, but I think it costs $6k.

@marktebbutt8052 11 ай бұрын

@@hdmoviesource my 2 peneth worth is go for an 8500 H or HA rather than the x800 series. I'm running a 8500HA in pre-pro mode and it's a monster bit of kit and exceptional bang for buck IMO.

@ts6640 10 ай бұрын

@@marktebbutt80528500HA user here as well

@hdmoviesource 7 ай бұрын

Very nice receiver.

@hitechrr 7 ай бұрын

This has to be one of the longest videos on youtube.

@hdmoviesource 6 ай бұрын

It's definitely getting up there, LOL.

@adamATOM3 11 ай бұрын

I’m excited to give this a try. Hopefully I can do this with Pioneer MCACC. Thanks for making this video and sharing your findings!

@hdmoviesource 11 ай бұрын

Does the Pioneer have room correction? Can import target curves Adam?

@adamATOM3 11 ай бұрын

@@hdmoviesource I have always just used the auto room correction on the AVR itself. It looks like I can purchase DIRAC to use with it. It looks like you can import with that program.

@hdmoviesource 11 ай бұрын

@@adamATOM3 Okay, thats good, Not sure how accuracte Dirac is using automatic setup, but all automatic room correction sufferers from errors one way or another. If you can learn how to do this you won't be sorry Adam.

@ts6640 10 ай бұрын

@@adamATOM3your Pioneer AVR should have at a minimum a GEQ feature. Try running the RTA with Auto EQ (MCACC) OFF or running full sweeps and then within the REW feature select ‘Custom’ and then put the Q values that correspond to the number of octaves your GEQ allow for (e.g. if your GEQ is limited to 1 octave bands then your Q values are all 1.414…..see below) 2 Octave Bandwidth: Q = .667. 1 Octave Bandwidth: Q = 1.414. 1/2 Octave Bandwidth: Q = 2.871. 1/3 Octave Bandwidth: Q = 4.36. 1/4 Octave Bandwidth: Q = 5.76. 1/8 Octave Bandwidth: Q = 11.54. 1/16 Octave Bandwidth: Q = 23. Then click the “optimize gains” feature in REW and input the gains/levels calculated by REW into your Pioneer’s GEQ. If your Pioneer AVR has a ‘PEQ’ EQ then select ‘Custom’ in the REW EQ feature, input the necessary parameters, and then have REW perform all the work (just input the ‘Calculated’ Q values (opposed to you inputting the ‘Q’ values’) and gains into your AVR’s PEQ)

@adamATOM3 10 ай бұрын

@@ts6640 wow, thanks for take the time to tell me that! I will give that a try for sure. This is new territory for me and I always appreciate when someone shares knowledge with me.

@marktebbutt8052 11 ай бұрын

Very interesting method with good results. I use the 'From File' in REW to measure all speakers in my 9.2.4 set up using external sweep files (Obsessive, Compulsive has these linked). I am also a big advocate of using REW to do the heavy lifting and MQX for application. Also REW/MQX has negated the need for MiniDSP 2x4hd so now removed from the chain. I would advise correcting each speaker individually to said target curve to achieve 100% tonal matching especially for surrounds and overheads. Obviously, proper use of absorbion/diffusion treatment and speaker position in relation to the MLP is fundamental in reducing the amount of EQ required and controlling RT60 decay. If you don't mind me commenting, is there anyway you can reposition your rear speaker or the overhead to achieve greater separation? Oh, and investing in a new vacuum might be a good idea 😂. Love your enthusiasm 👍🏻👍🏻.

@hdmoviesource 11 ай бұрын

Thanks. I have theories as to why averaging the speaker measurements is better because I've tried individual speakers before and they didn't sound as good as averaging and combining the 2. However, when I get time I might try an individual calibration again. I am also considering removing my MiniDSP from the chain, but I need to make sure that I can get the EQ as good as I have now because my subs are set up crazy good right now. In theory with this new method, it shouldn't be an issue. I also use a different method for my subs. I measure to flat and then apply the room curve afterward. I think it gives much better sound than using a target curve for your subs. I can't move my rear speakers and Atmos speakers no. I do agree that separation certainly could be better. I'd also like to use wides, but, yeah, it's having the space in the room to make it work. I may try the "from file" option at some point. I'll get a cleaner, LOL. Thanks for your comment. It's great to meet people that are really interested in this.

@didi_p7756 10 ай бұрын

Hi, i like your videos so much; thank you for doing all this work🙂 in one of his last videos OCA is measuring with Audyssey MultEQ-X and then extracting and importing them into REW. What do you think of this way; would this be the same quality as the CD from Joe N Tell? I have done, and i like it very much; but i have no comparsion! Maybe i will try 'your' method with the new sweep files from OCA next week and see (or better hear) what the differences are; what do you think about using the measurements from Audyssey?

@hdmoviesource 10 ай бұрын

Thanks. From what I've seen so far, from disc and from REW are exactly the same. I'm trying to watch as many OCA videos as a I can LOL. I just finished recalaibrating my system with all of OCAs new Dolby Atmos uncompressed files, they are very good. I didn't use the sub channel though because there's a negative 3db slope on it, so I used REW for the sub.

@cheekster777 11 ай бұрын

Another epic video. Thank you Carl. 🙏🏻

@hdmoviesource 11 ай бұрын

My pleasure! I really hope it helps. I'm calibrating my system right now using this new method and it sounds incredible Cheekster.

@christiandickey 5 ай бұрын

Excellent information brother 👍

@hdmoviesource 5 ай бұрын

Thanks Christian, much appreciated.

@didi_p7756 10 ай бұрын

Hi, Great video; thanks a lot🙂 But when you say that the 'psychoacoustic smoothed' responses are the same with REW-sweeps and RTA and the CD, thwn i dont need to buy the CD; did i get that right?

@hdmoviesource 10 ай бұрын

You dont' have to get the disc no, as long as you have files that can play Atmos heights, you can use REW to measure. I use both and they appear to be the exact same response.

@longieboy 4 ай бұрын

Hello, thanks for the detailed tutorial. Can i use your tutorial with the REW test tones without the spatial audio calibration disc?

@hdmoviesource 3 ай бұрын

I will do that soon yes.

@djcradd 10 ай бұрын

Hi Carl. Great video. At 22min you talk about making an empty calibration file for the Audyssey app. How do you that?

@hdmoviesource 9 ай бұрын

Hi, I just removed all the current calibrations that's all and save that file so it's empty with nothing on it.

@Alex-hq4xy 10 ай бұрын

Interesting method. Btw, you measured at the mlp. How to do when you have multiple row seats? Also can't we do the same with Audyssey mobile app?

@hdmoviesource 10 ай бұрын

You can't do the same with the mobile app no. There's a lot you can't do with that app. You could try measuring one row and the another row, then average the responses and EQ that. I don't measure for multiple positions, but that's how I'd do it.

@alipazooki9297 10 ай бұрын

Hi, I’m new to odyssey, but I was wondering do you necessarily have to measure with an Audyssey microphone? My receiver is in a separate room, so I don’t know if I can reach the receiver, but I do have the spatial audio tool kit.

@hdmoviesource 10 ай бұрын

If you have a microphone, like a UMIK1, and REW, you can use the full range test tones like Im doing if you have the disc also. The Audyssey mic is pretty poor at measuring bass and high frequencies.

@roughnek201 5 ай бұрын

I finished running through this setup for my 7.4.4 setup in my room. While my speaker responses are definitely more tightly lined up with the target curve when I SPL align them in REW. But in my actual room the listening levels are alot lower than they were before. Do I need to reset the trims using REW after this? I didn't see that trim reset step in your video. I noticed that your front left CAL is about 72.3 dB and your front right cal is 75.6 dB. What do you do in your Denon AVR to make sure they are playing at the right level after loading the target curves?

@hdmoviesource 5 ай бұрын

I would use auto-balancing in MultEQ-X. Typically, I aim for 75 dB when measuring for real.

@roughnek201 5 ай бұрын

Thank you so much for posting this video. However when I do the A/B Trace Arithmetic function my generated measurement is not the symetrical trace that your's is. When I export A/B as text I'm seeing wild cuts as much a -17dB in areas where maybe it should be 4 in order to bring original response to the curve. Anyone else have similar issues?

@roughnek201 5 ай бұрын

I think I figured it out. In order to get the mirror image the way it is described in the video I had to select [A]/[B] as my calculation vs the regular A/B. Maybe there are different assumptions in REW 5.30 vs 5.20

@hdmoviesource 5 ай бұрын

I use [A]/[B] is that what you're using now? That's what it should be, and A should be the target.

@FrankieKennethL 9 ай бұрын

I found this video incredibly informative and really perked my interests. i unfortunately no longer have Auddysey and have moved to ARC. One thing I am bummed WRT ARC is that it doesn't allow you this level of granularity and customization. in the video you mentioned Audio Advice....are you local here in The Carolinas? I'm in Columbia, SC.

@hdmoviesource 9 ай бұрын

Oh nice Frank, I'm in North Carolina. Yeah, I'm happy with Audyssey because it allows super fine control. I wonder if this can be done with Dirac?

@didi_p7756 10 ай бұрын

Hi, do you measure only at one position (main listening position) or at different positions?

@hdmoviesource 10 ай бұрын

I measure at one position.

@didi_p7756 10 ай бұрын

Hi, again; better to watch the video to the end, because the answer is given there, sorry! but another thing i want to ask you, because i'm not clear about: It's always talking about 'Atmos-speakers', but what's when it want the height-speaker in a Auro3D-setup; is there any difference between 'Atmos'- and Auro3D-speakers, or is this just a name for both?

@hdmoviesource 10 ай бұрын

Auro 3D layout supports Dolby Atmos, so I think they can be used interchangeably. I use an Auro 3D layout and Atmos sounds excellent.

@cush86-thfc 3 ай бұрын

Hi. Can I ask at what point set your trim levels and distances? Is this before or after the EQing?

@hdmoviesource 3 ай бұрын

It's so the sound arrives at the correct time. I do it after EQ. I have a video out about timing I just put up recently, check it out. But, I've found another method, so I'll be putting a new video out soon too.

@cush86-thfc 3 ай бұрын

@@hdmoviesource thanks for the response. Your videos have invaluable. Just another question, my subs are are at -6db at 30hz. Peak is +5 at around 50hz and -9 at 120hz. I’m assuming this is not good. Is it safe to EQ these with mini dsp and Boost those frequencies to flat and then still apply house curve to boost the 30hz another 5db? I’m just finding my system is lacking some punch especially when I’m listening at -10db

@hdmoviesource 3 ай бұрын

@@cush86-thfc Its hard to say. One thing to think about is that, when the 120hz roll-off is in place using the LPF for LFE, that 120hz boost shouldn't be such an issue. One way to see if your volume levels are correct is. Sweep the right channel in full range. Then set the speaker to small, unplug the right speaker and sweep the channel again. Now you can see the volume of the sub compared to the mains and adjust as needed. You could also overlay your target curve at the same volume.

@ssj1goku2000 11 ай бұрын

Might be a dumb question, but would you be able to do this with soundbar setups?

@hdmoviesource 11 ай бұрын

No, unless it has its own room correction. With that said, you could play some full range pink noise, and measure that with REW and a mic, and see how close you are to the target curve, and adjust bass and treble based on that. But I believe that's about all you can do if you have a sound bar.

@ssj1goku2000 11 ай бұрын

@hdmoviesource thanks for taking the time to answer that! Seems I'll just wait till I have better home theatre set up. Your vids are great, keep up the good work, love what you do and how much passion you put into it!

@hdmoviesource 11 ай бұрын

I appreciate it goku.

@Olofberglund 8 ай бұрын

I’m curious, why would you not correct the 5 dB difference in REW? You could create the EQ filter and apply it in REW and then continue the EQ process? Oh, I think you just answered it later in the video: you want to be able to remeasure the speakers and have that correction already applied?

@hdmoviesource 8 ай бұрын

If this is concerning the bass. I use a spreadsheet to see the bass. Is this what you meant?

@Olofberglund 8 ай бұрын

@@hdmoviesource this was actually regarding your treble discrepancy between your speakers. You corrected the difference in MultEQ-x instead of creating a filter in REW, but I think you mentioned the reason a bit after. So you would know it’s already corrected when doing new measurements, I think 🤔

@hdmoviesource 7 ай бұрын

Okay, thanks.

@kuriakos36 4 ай бұрын

Hello buddy i love your videos but i have a question i dont have multiq x program i have xt 32 so after equalization i have to take the nembers put them to excel and after to json editor to be ready for audyssey app but the problem is that i dont know how to make parenthesis and comma's to excel to all number's because json editor need all this can you help me how to make the parenthesis and comma's to all number's the procces??? Thank you !!!!

@hdmoviesource 4 ай бұрын

Is this json editor that OCA uses?

@kuriakos36 4 ай бұрын

@@hdmoviesource yes but i dont know how to make the number's with "(,)" all of this and then to go for json editor... I stuck to this 😔 what i can do.?

@hdmoviesource 4 ай бұрын

I do not know how to use json editor.

@kuriakos36 4 ай бұрын

@@hdmoviesource i know how to use json editor... The problem is i dont know how to make the numbers to Excel have this look ... For example "(23, -2)", to all the column

@hdmoviesource 4 ай бұрын

Oh, I see. Click on the column and select Format. You can change the display format to whatever you need it to be.

@farfarad89 9 ай бұрын

Could you send your used Harman Curve. Thanx

@hdmoviesource 9 ай бұрын

Send me an email, it's in the description and I'll send it to you.

@farfarad89 9 ай бұрын

@@hdmoviesource Thank you. I have found the file in the describtion now. Great

@hdmoviesource 7 ай бұрын

Thanks.

@msoles30 11 ай бұрын

So if you measured both speakers up close so why is the treble still low on one what could be the problem

@hdmoviesource 11 ай бұрын

Well, interestingly enough all my other speakers have the same treible and my left speaker, which is the lower treble measurement. Its weird issue. Luckily this calibration fixed it and it sounds incredible now.

@msoles30 11 ай бұрын

@@hdmoviesource so do you think the crossover is the problem or bad tweeter

@hdmoviesource 11 ай бұрын

Honestly not sure, but a 5db raise is definitely significant. Luckily we can correct for this now.@@msoles30

@msoles30 11 ай бұрын

@@hdmoviesource how would you bring up the treble in rew or creating a high shelf filter in rew

@hdmoviesource 11 ай бұрын

@@msoles30 hmmm. You could possibly do it in the EQ section of REW.

@BOT-dv9lz 4 ай бұрын

When i drive my electric car i can see the big loss that manuals have trying to pull away. Its not easy to feel driving the manual, but driving a electric car you can see the dela in gearing and rewcurve.

@hdmoviesource 3 ай бұрын

Okay.