A1 Evo Nexus home cinema optimization tool Part II - REW

[@DigitalKirkley]

When I say the sound from Nexus has progressed to another level over MJ, it really, really has; way beyond. I have yet to use the Audyssey MIC, only the UMKI-1. Straight away the noticeable difference over MJ is so obvious, the clarity, precision, detail, soundstage blending, bubble and dynamics are way beyond MJ. Bass is integrated perfectly and provides the exact type of bass Iw as hoping for. I have been through my test scenes from various movies Quiet Place 1 and 2, Barbie, Ready Player One, Top Gun Maverick, Fall Guy and Baby Driver. So firstly clarity. It is exceptional. I noticed the dialogue with Nexus is so crystal clear and slightly higher in volume? Way clearer than MJ and very impressive. It was our first noticeable difference when listening to the split screen telephone conversation in Fall Guy. This scene is also really good to gauge panning of the sound over all front 3 channels (LCR) and no surprise here the sound is excellent. You cannot tell its coming from the L, C or R, its so good; seamless over the whole front. This was one of my biggest surprises with Nexus, the front sound stage blends and pans over all speakers so, so well; wonderful stuff. You should be proud of this alone! Next the precision and detail. On QP2 during the scene when they are carrying the baby in a box from the tunnel to the safe industrial unit, you can hear extra and precise detail from the burning flames and then when she catches her bag on the wired fence. I have never heard the bag catch so detailed and accurate, you hear litterally hear the scraping of the leather; its awesome (if I pin dropped you would hear it; my word its unreal!). Far more effects are heard throughout this scene than before, the sound of crickets outside is way more obvious and detailed and I especially love the bit when the girl uses the microphone to invoke feedback on the speaker, bass integrates so well and the precise detail/clarity here is outstanding (Blows MJ out of the water!). As they progress, the creature chases them through the warehouse and its here that Nexus does it for me. You can hear every barrel the creature is knocking/moving and rolling out of the way, the height channels seamless with the subs creating such an unreal depth of atmos bubble. Every single movement, tap, knock, scrape, screech, bang is precision perfect! So far I am using Dirac Harman Curve 8db and aligned with centre as I am finding the precision detail for some movies in QP a little better than LFE+Main; I will come back to this as I am loving both (its really hard to decide!). Using the same config/setup I then move on to ready player one and again detail is so precise, crystal clear, its as if a filter has been removed from MJ to allow the sound to be cleaner, enhancing clarity and dynamics. The hand punches on ceiling of car, the coins and then kong jumping around; my word it is incredible. How did this get better than MJ, was it all Nexus OR did the UMKI-1 play a part also? I cannot stress how detailed, clean, precise and spacious Nexus has made this Atmos bubble; seriously if you have not tried this please go and do this NOW!! I am now on to the final straight with top Gun Mavarick and here I push the volume up to see how the configuration with Nexus plays out. I can really push the sound way, way up and even though its loud, you can hear everything so, so well; no distortion or over the top loudness. Just pure class. It feels like Nexus has finally unleashed my Cinema 40! With Barbie, its mainly for the dialogue and highs/treble, as the range of voices is great and the music, backing singers all given the enhanced experience of clarity and detail. The family think I am mad as I repeat the same tests over and over but I guess its the only way you would notice any difference? baby Driver and the scrap yard scene where we have music, detail and then transition to dialogue is where I compare align with centre and LFE+Main. They both have very close qualities and LFE+Main might just edge for the music and bass part however aligning with centre may just edge for the detail and dialogue focus of movies where dialogue is the key bit/type of movie. For example, Rivals on Disney Plus, LFE+Main rocked the various music throughout that whole series and I highly recommend a watch and especially a listen! I was very surprised to hear such differences moving from MJ. I wasn’t expecting such obvious enhancements. Incredible work Serko and appreciated as ever. How can we get clarity, detail or dynamic spacious Atmos bubbles with such wonderfully integrated bass better than this? It really is that good and I mean that good. At this point I am hearing the applause from the conductor test clip ;-)

[@andrew81818]

I'm still enjoying how well MJ worked better than prior Evo1 releases, so it's hard to imagine Nexus being that much clearer, as you've nicely describe. It is a wonder as to what makes such a difference with Nexus. MJ runs off the measurements through Audyssey, using a lot of them (8 measurements) with unknown quality having no way to review them. I'm curious, what was your process with recordings for Nexus? How many mic positions; how far apart; did you review each to trash noisy traces; etc.

[@DigitalKirkley]

@@andrew81818 completely understand where you are coming from. I kept this really, really simple. Single measurement for each speaker using UMIK-1 using the VLC sweeps for all except LFE (In my MLP). I run 5.2.4. I used REW for the LFE sweeps switching one sub on and other sub off (vice versa). After having a single measurement for each, I just run Nexus. I did spend a little while getting the bass/subs correct. I found that REW LFE with -10 checkbox enabled and setting -8.00 db in REW provided the best results (I mean it sounds great!). My sub output levels became +1.5 and -1 as a result after uploading. the .ady file (Make sure you completely power off/cycle after upload!). That was it. I have yet to listen to multiple measurements per speaker doing the cross correlate/vector average; mainly to keep it simple and to just become familiar with the process/my setup etc although I am experimenting with this now. The difference is night and day with MJ seriously. I didn't expect it to be this way, I was very, very surprised. This is with Nexus defaults also.

[@andrew81818]

​@@DigitalKirkley Thanks for the info. I'd be interested to hear how things turn out after you've tried multiple measurements. I am wondering if having more measures (vector average) may actually hurt, not help. One clean recording (per channel) may be all you need for Nexus, since it filters only the bass. I'm curious if Nexus (vs MJ) may perform worse off-axis though (non MLP) - perhaps less uniform (flat) across frequencies by over correcting for the single point in the room?

[@Chris-sb9nz]

Serko, I just donated $20 to your YT account. MJ Maestro was/is amazing but NEXUS took my home theatre to a new level! Thank you so much for all of your hard work!

[@anstra7028]

What can I say, amazing 🤯 Much appreciation. I don't think you realy realise the magnitude of your work and how much you are helping the community to get the best out of their sound system 👏

[@ocaudiophile]

My pleasure!

[@matthewdyer7501]

You took the time to respond to my questions earlier - which was really nice. I just finished with A1 Evo (w/o Nexus) on my x1600 and I'm really grateful for all the work you've put into this. Thank you. Nexus is definitely beyond my skill but the A1 Evo was a breeze.

[@ocaudiophile]

🙏

[@burtonscustom]

Always happy to contribute as your work continues to blow me away. Atmos channels have come alive in DD+ TV shows and it put me right in the middle of a thunderstorm without waking kids. Truly, thank you again for all you do.

[@ocaudiophile]

Thanks again!

[@eyepokeTX]

Thank you for your time and effort in creating this optimization tool. My system now sounds extremely clear/balanced and I'm hearing details in my speakers I never thought possible!

[@ocaudiophile]

You're very welcome!

[@naamah-dh]

Thanks for your work, I follow you since A1 evo and done all your tutorials. The sound became better and better each time. This lastest grinding change the done, even with a poor audio band on an old serie. It took me about 4 hours to do it properly. That’s amazing

[@ocaudiophile]

Great job! Cheers.

[@HomeTheaterCommish]

Thanks! I will always be a disciple of your word.

[@ocaudiophile]

Yo da'man😉

[@gbye007]

I finished a measurement of 7.2.4 system, and Optimisation in Nexus v2.2. Used -12dBFS lossless sweeps with the -10 dB SW sweep. Everything came out as expected and sounds fantastic. The bass integration is a game changer - nice tight, smooth, extended, non-boomy bass matched to e target curve of my choice! Nexus allows me to add extra measurement positions, or change a sub setup, etc, without having to remeasure the whole setup. It will also allow me to do a DEQ setup as well after I experiement with the non-DEQ setup. Thanks Serko for your great coding and persistance in developing this Audyssey optimisation. Beats me what the actual guys at Audyssey are doing - nothing new from them except a new smoothing algo all year.

[@ocaudiophile]

Wait for anitDEQboost2.exe which will remove sxcessive surround/height boost of Audyssey DEQ in lower volumes.

[@ericfilion259]

How did you manage to mesure the .4 REW only mesure 7 speakers i think ?

[@gbye007]

@@ericfilion259 With the sweeps provided by OCA, played through VLC with HDMI passthru. Watch the video.

[@roughnek201]

Thanks you so much for your work and time and attention to all of this. Can't wait for version 2.0

[@ocaudiophile]

🙏

[@MatthiasMaunz]

Is there a chance to get something like this for a 2 way stereo system or much better for car hifi system running a raspberry pi with camilladsp??? What you are doing with REW is just amazing!!!

[@siberteeckhoudt9932]

Thanks! for the hard work, the awesome software and the fast support!

[@ocaudiophile]

🙏

[@Adrian-vs7sq]

So far the most significant improvement compared to EVO Maestro. I have the UMIK-1 USB Measurement Microphone that I've used for measuring. Thank you very much for your efforts.

[@ocaudiophile]

Great to hear!

[@someguygg]

Just went through the process. Like being able to redo measurements with rew! (Such as lowering my subwoofer to have near 0db volume adjust needed.) Worked fantastic with a umik-1, best sounding my Paradigm Signature S8 have ever sounded. Crystal clear, nice thumping bass. Did it all with DEQ at 10 offset.

[@someguygg]

Noticed that the final ady has midrange compensation enabled on multieq app. Should we take this off or leave it?

[@ocaudiophile]

That's the spirit👍

[@ocaudiophile]

That should be enabled only for the subs. I'll double check if there's a bug

[@vortexor1]

Did you compare it to Audyssey Maestro MJ? Is the difference significant? thanks in advance!

[@someguygg]

@@vortexor1 I've used each release, liked the initial EVO ones. My setup does sound different than Maestro MJ. Being able to use my UMIK calibrated microphone and find the central spot was a good improvement. I've used many target curves, making each release hard to compare. Using the Harman Kardon curve this time.

[@justinhaws9154]

First :D OCA you are amazing. We appreciate you and your countless hours of hard work more than you know. I cannot wait to watch this again later and setup my new Nexus setup!

[@ocaudiophile]

Cheers!

[@DawtComm]

First I want to say thanks for all your work in this arena. What you have been doing is amazing and makes a huge difference in the theater room. I do have a problem I am trying to solve. I have made three position mic measurements on a particular speaker that when I cross correlate I have it synchronized at the start incorrectly. I have the MDAT file for you to take a look at before and after correlation if that helps.

[@DawtComm]

The drive link to the mdat file is: drive.google.com/drive/folders/13Wg07ABIOObL_xT0lRxjwuH4r4zkPQDG?usp=sharing. The actual speaker in question is TFL. I have all my other measurements after cross aligning and Vectoring in this file also if you need to see them. TFL # is after Alignment, and TFL B4 Corr is before alignment. Also noting the second set of sine waves tf2 has a significantly higher percentage which might be the cause but technically this spot is further from the speaker.

[@ocaudiophile]

I appreciate that! In Overlays/Impulse graph, if you right click on the problem measurement in the measurements list on the left and select "offSet t =0", a pop up window will open where you can move the speaker impulse back and forth and manually align it to the MLP response. You can use fine adjustment and use the numeric input box for even finer adjustments. I fixed TFL for you: drive.google.com/file/d/1NU9C4mOnW0wScFLev_f8f0HhyuD8c84T/view?usp=sharing

[@DawtComm]

@@ocaudiophile Again thanks so much and I ran through the exercise myself also to make sure I knew how to make that adjustment. One last question and this will be quick. I noticed some speakers +100 or -100% are opposite of each other? This normal or do I have wiring issues?

[@ocaudiophile]

That's not a very good indication of speaker polarity. Compare their phase responses in Overlays by smoothing them to "Psy" first. You can invert the measurement in REW, it's one of the right click options. You can see which polarity is more inline with the other speaker(s).

[@thomasleeb4790]

A combination of evo and audysssey art would be perfect😊

[@tmparrot]

How do I do "audio sweep files" for my Auro-3D 13.1 configuration (specifically CH and TS as they are not in the Atmos files provided?) - I use a Marantz 8805A AVR not that it matters? And thank you for all the excellent calibration work - an amazing upgrade from straight Audessey; best I've ever heard my system sound!

[@aldofigueroa4758]

x2

[@ocaudiophile]

I have heard people manage to play Auro channels when they set FH and RH instead of TF & TR but I don't know much detail about Auro systems tbh. However, you can always switch banana plugs behind the AVR and measure them with any other sweep. For just CH and TS that shouldn't be tedious. Give them appropriate names in Nexus as in the Auro ady and you are good to go.

[@tmparrot]

@@ocaudiophile that seems to be the best approach switching the plugs however I would assume care be taken the same amplifier be used because of their individual sound profiles. Once again I love your contributions with these calibration software tools. Simply amazing and superior sound over Audessy. Please keep it up.

[@hervep.5548]

Hello, first of all, thank you for what you do. I have a problem when launching the "optimize calibration" menu. The speakers are correctly named because they have been duplicated in REW. Then I confirm that I have activated the Dynamic EQ. I then entered the volume of my amp at the time of the measurements under REW. And from there, I have recommendations (in blue) like using the FoxDynamicEQ.exe etc.... and nothing happens anymore. Thank you in advance for your help. Kind regards

[@ocaudiophile]

It could be your REW version or installation. You can get more help in the "Audyssey One" facebook forum for such issues.

[@mauriciob8260]

Mr OCA I was watching your live listening with my headphones but I fall sleep but in a good way: the most amazing thing right away I start dreaming with you , in my dream my brain was listening to your live and it was like I was in a classroom paying attention to your Evo Nexus guide , I even meet you after the class ends I shook your hands to thank you for your great work.

[@jaminkle]

I wish I lived in a timeline where you didn't post this comment.

[@isak6626]

It would be wonderful if John could update REW so that your Atmos sweeps could be played entirely through rew (a little playlist inside REW). That would save a lot of time spent on clicks.

[@ocaudiophile]

That's not technically possible. REW is written in Java and has no access to HDMI passthrough.

[@isak6626]

@@ocaudiophile there is the sequential measurements function, perhaps that could be improved so that a single sweep file containing all speaker sweeps could be used to produce all individual speaker measurements per mic position in one click. That would be neat.

[@burtonscustom]

Dynamic EQ calibration for the first time and it's gonna take some getting used to, quite louder than ive gotten used to. I did see a discrepancy from past evo/maestro where my TML and TMR were set +3dB different where theyre usually set the same level. TML sounded way louder so I changed levels to match and it seemed to blend better after that.

[@NickHubb489]

I have just stumbled upon this video and WOW i can't wait to try it, amazing work. If i am using a mini DSP to tune my 3 subs how do i go about running this calibration? Do i leave my current HC/Time alien etc in the Mini DSP and run this over the top? Thanks.

[@ocaudiophile]

If you've one of the new models with 4 sub outputs, better remove Minidsp or else keep it but remove filters from it and use minimum time delays.

[@NickHubb489]

@@ocaudiophilecool thanks. One other question ref the Center measurements, do you take a mic Center measurement for every speaker then align each speaker or do you just take one initially and align each speaker to a single measurement.?

[@rippedgeek]

This is fantastic, thank you so much OCA!

[@ocaudiophile]

Glad it was helpful!

[@ThomasLeeb-u2t]

Regarding delay limits, one approach could be to change EVO so that it sets the Subwoofer always at 0 ms / meters and delays the rest of the speakers accordingly. so you gain at least the distance from your Subwoofer to your listeting position as extra delay time. You can do that also manually in the receiver afterwards I think, so set the SW to 0 and adjust the other channels with the detected difference of delay

[@ocaudiophile]

You're confused. Setting SW distance to 0 fires subwoofer the last after all other speakers. Subs have inherently delayed signals due to all the lowpass filters etc in them and they need to be fired first to catch up before the speakers start playing. For that reason subs will usually be assigned the longest distances among speakers. AVR will start playing the farthest away speaker first and the closest speaker to MLP (which has the minimum distance setting) the last.

[@thomasleeb4790]

You are right of course... then what about setting the closest speaker to 0 to gain some max Distance if necessary to Match sw to rest? At least 1 to 2 Meters should be possible as normal distance of surrounds..

[@ocaudiophile]

That's what Evo does. It works on time delay differences, nearest speaker is always at time 0.

[@kenny4487]

Last version I used was A1 Evo v3. Is it worth the effort switching to nexus, if I just have the standard Audyssey mic and a 5.1 setup with 1 sub?

[@navidmahmood876]

This is for folks who want to go full manual. It’s more involved and will yield slightly better performance. But it’s not going to be a night and day difference like plain audyssey to a1evo was.

[@satii24]

@@navidmahmood876how many measurement positions should we use?

[@ocaudiophile]

Start with MLP only and listen to your results. You can decide what area to extend your mic positions in time. You will probably not need to ;)

[@dezolis]

@@navidmahmood876 ⁠what about those of us who never get near 85db which is what has always been used for EQ with audyssey and A1 EVO?

[@tobixdklarsoweit6368]

thanks oca you are best 🎉 can i manuell a normal ady to deq boost switchen ?

[@Fourthdegree]

I got to the "waiting for timed reference" at the point where you calibrate the mic distance and it just kind of waits. I don't really know what I am doing wrong. I am excited to get this to work.

[@ocaudiophile]

It's waiting for the initial chirp at the beginning of each sweep which comes from the front left speaker.

[@Tim_E88]

Hi Serkan, I watched the complete video and read a lot of the comments. Thanks for sharing your knowledge and putting so much time and effort in this project. I'm new to the optimization topic and I can't evaluate the benefits Nexus (doing all measurements on my own) has over Maestro (using the audyssey measurements). Do you have measured the results of both versions and compared them? Or how would you describe the audible difference of Nexus/Maestro in the room?

[@ocaudiophile]

Some people say day and night but that's probably hard to explain. My system saw an improvement in sound of about 10-15% I 'd say. I have measured my results not because I needed to because I will only go back to the board if I hear something I don't like but I was testing the anti-DEQ tool and saw that Nexus results are better volume aligned in general.

[@thevidman11]

Thanks!

[@ocaudiophile]

Wow! You are very welcome!

[@jameswenn1963]

Thanks @ocaudiophile, another leap forward. A process question to confirm measuring multiple subwoofers. After loading the new base .ady config file from Nexus (zero values) - 3800h. I used REW pink random noise Sub Cal SW1 then SW2 (30 to 80 Hz) and then Speaker Cal on FL (500 to 2000 hz) to make sure all levels were the same (75dB), Then identified the center mic position and performed 3 test sets. Nexus script completed with no errors.. House Curve used was the standard HK file as per zip file. Nexus set the SW1 and SW2 at +3db, LFE + Main 250hz. Bass is present but not dominating, vocals are crystal clear. Did I understand the process correctly?. Just checking I understand...

[@ocaudiophile]

Sound like you did! Make sure you follow up the updates though. There are still bugs being ironed out.

[@add_it_up]

This looks amazing. But obviously it’s geared towards Denon+Marantz AVR’s. Is there any hope for other AVR’s? I use an Anthem MRX740 and would love to do this even if it’s a manual process to see what gains could be had in my system

[@ocaudiophile]

If you can feed Nexus a dummy Audyssey ady file with the same speaker set of your system, you can get the distance/level/XO figures from Nexus but EQ will be not easy to implement.

[@StuggiSuzi]

Hi @oca! Just being done with REW measurement and Nexus processing, everything went very well. Just a few remarks and questions. In generel, i did a measurement with DEQOn, and my SPL level i made at -25db (which i also stated as Nexus asked me). 1. Subwoofer is set to -10db, which seems a bit low. I used the Standard Atmos sweep, not the +10db one. Should i use the other? 2. Script says that " 120Hz - set 'LPF for LFE' to 250Hz in the AVR for better LFE channel output! Sub is also not suitable for speaker crossovers above 120Hz", but also says to change to "LFE+Mains with 110hz on BEL. How does both match, because i only know where to change LFe+Main with Bel 110hz. 3. Not sure what to make with this message: "Limiting search frequency to avoid bass localization due to asymmetry due to odd number of subwoofers in the system!" I am just using one Subwoofer, which i named "SW1". This was created from 4 SW measurments and then Vector Average. Thank you!

[@ocaudiophile]

1. Stick with -10dB (SWx.mlp) sweep if the resulting bass sounds fine. 2. The two are different settings at different places in the AVR menu. Do exactly as the warning prompts say. 3. Use "uncap subwoofer lpf" since you have in fact 4 subs.

[@StuggiSuzi]

Resulting bass is a bit low for my taste, so i think testing other target curves? In only have "lpf for LFE", so i guess 250hz would be right. Denon x3600 doesnt have two optiona for lfe.

[@ocaudiophile]

@StuggiSuzi You adjust it with front speaker crossover in a 3600

[@dorianestate]

Hello OCA . Please advise me , how to aproach this if i have a bass shaker . Denon X3500H AVR . So i run audissey and fool it by connecting a double RCA to both sub outputs on the avr and connecting both RCA to the subwoofer . My subwoofer has 2 RCA input , L+R . So when calibrating , Audissey sees 2 subwoofer when in fact there is only one . After calibrating with audissey i just move (connect) the sub 2 output to the Fosi Tp02 amp which drives my Dayton Basx A300 . In all of this i think i have a problem regarding the volume , because at the end when connect the RCA correect , i mean the sub output from AVR to subwoofer now i have 2 RCA signals that enters the subwoofer , not only one as i do the calibration . I hope i can make myself understood ... Thank you

[@ocaudiophile]

Many thanks!

[@ocaudiophile]

Try v1.9 and the new sweeps uploaded a couple of hours ago.

[@dorianestate]

@@ocaudiophile Ok. Will try it . How to set the bass shaker in REW , do i copy the original sub measurement and then make it flat on the eq ? Thx

[@ocaudiophile]

@@dorianestate You need to use REW's internal sweep for sub. The details are in the changelog in the download folder. No experience with TTs sorry :(

[@hdmoviesource]

Another great video, thanks OCA!

[@Majchel]

Hello OCA, I did one measurement without Dynamic EQ (via blueray player, with lossless files) and always used it for the new version of the script. But after the last update, I'm a little bit confused. What is the purpose of FixDynamicEQ.exe? Is it better to make measurements with Dyn EQ ON? I listen to my system mostly at night, but I always try increasing the volume for reference level, mean -30db on AVR. That should be the volume at which the AVR stops editing curve by EQ when DynEQ is enabled. It will make a sense for me to do measurements with DEQ ON? and use the SW uploaded by new ver. Nexus 2.3? Or it is still the best and easiest way to measure, with Dyn.EQ off on the volume lvl, which I prefer to be a calibrated? For me 80db. Mentioned by script [IMPORTANT] Final target level optimized for minimum total volume step deviation per speaker and maximum overall adjustment flexibility: 79.99dB Maybe a idea, to make a new video, or some documentation ,where you can compare the calibration with vs without Dyn EQ. If that make any sense. thx.

[@ocaudiophile]

DEQ on measurements are identical to DEQ off ones at the measured AVR volume level. If you regularly listen also below that level then DEQ on measurements will make sense. They are better at lower volumes. FixDEQ fixes the problem with DEQ which is too much surround/height boosting at lower volumes.

[@StuggiSuzi]

@@ocaudiophile So do i run this while hearing to music or watching a movie with DEQ On?, or does it fix my ady after nexus created it and then update it on the VCR?

[@ocaudiophile]

@@StuggiSuzi First one.

[@aurelienduplan9139]

Awesome as usual !! Thank you so much Sir !

[@ocaudiophile]

Most welcome!

[@PauloPHGTA]

Man I got say, I am loving testing and messing arround with A1 Evo Nexus!! I notice some things while playing around with Evo. 1 - Since it only calibrates below 282hz, if you put a custom curve like the Harman Kardon that have a high frequency roll off, it will just ignore the high frequency roll off of the curve sinse it doenst calibrate high frequencies, so the custom curve only applies below 282hz by default. (yes you can make it calibrate until 20khz but I did some tests and its better leave at default or the maximum 1khz recommended). 2 - if you increase the maxboost it will take a lot longer to generate the ady., some times it even seens stuck (best to leave it in the default mode) 3 - in my case I updated my old REW to the the latest beta, it didnt work out so if you got stuck genereting the ady file just install REW fresh. 4 - Analysing my speakers impulse before and after calibration, I noticed that it changes a bit, not by much but it changed, is Nexus trying to corret Impulse Response just like Dirac? Finally, my system definitively sounds clearer with more details and better stereo imaging in both movies and musics, I tried calibrating it manually, tried Audyssey app with a lot of adjustments, tried Audyssey Supreme calibration (it was what I was using before this new calibration, and the better of all until now with Nexus), and Nexus is clearer the winner of all this options above. Thanks OCA for this awesome tool!!!

[@ocaudiophile]

🙏

[@SeanGreensmith-i3p]

Hi OCA. A few quick Nexus questions. The video part 2 has separate files for each speaker but there is a single m2ts file in the downloads folder. Do I need to edit this for the speakers I have? Sub levels before measuring. I turn the receiver to a high volume but do I need to level match the sub before measuring or is this not necessary? Couldn’t find a way to search comments so apologies if this has been asked already.

[@SeanGreensmith-i3p]

Found the files in the Mac folder. Is the windows version still better for atmos optimisation? If so, do I still use the mp4s in the Mac folder??

[@ocaudiophile]

You can use mp4 files just the same but you will need to measure the subwoofer with REW's internal sweep.

[@delarue98]

@OCA. Excellent job. You out did yourself again. I am not able to get the Atmos files to play thru my speaker using VLC. I am using Java settings. Sound Card Settings:Output Device: EXCL Denon AVR, Input Device: EXCL UMIK1, Drivers: Java. Where did a go wrong.

[@delarue98]

Resolved. Was pointing to the file, instead of the folder with a similar name.

[@delarue98]

@OCA Spoke too soon. Not working. After I select From File the -> Calibration File is showing EXCL Denon as sound card Cal File and Mic Cal File as EXCL UMIK1

[@ocaudiophile]

You will need to restart REW/Preferences/Soundcard steps

[@delarue98]

​@@ocaudiophileresolved. Thank you. On another note: after I do multiple measurements at different locations, I should align and vector average like speakers such as RHL1 with RHL2 and 3, and LSA1 with LSA2, and 3.... Right? Or should everything be aligned FR (the reference)?

[@ocaudiophile]

@delarue98 only cross corr align different measurements for the same speaker's MLP position and average them. Don't align speakers to each other, that's for Nexus to do.

[@vbsh9]

I take it that it is still advisable to use a miniDSP for subwoofer leveling/phasing before using this if the subwoofer outputs on the AVR don't send independent signals to both subwoofers?

[@ocaudiophile]

Yes but keep the relative delays in MiniDSP short (within 5-6ms)

[@aldofigueroa4758]

Hi, great job. I have 2 subwoofers and my receiver has two subwoofer preamp outputs. If I have a miniDSP, can I further improve the calibration with some procedure or is the subwoofer calibration sufficient with this script?

[@ocaudiophile]

Yes you can remove the miniDSP from the system.

[@mohamedsattaur9874]

Hello OCA - With black Friday around the corner, do you think it would be a worth it to purchase a Dirac license with full bass control? My system has never sounded better but i still struggle with bass control and was thinking of purchasing the license from Dirac. - Thanks

[@ocaudiophile]

I hear Dirac has lots of issues lately especially with Denon & Marantz gear but the choice is yours.

[@eleckson]

How do I center my ears? They're more than 3cm apart :(

[@ocaudiophile]

hahahaa, you need to cross correlate them to each other ;)

[@timothypoozhikala9791]

This is great! One thing I noticed, I am running a 5.1.2 setup, and when I play the SLA and SRA files, they play out of both the front and surround speakers instead of just the surround, is that supposed to happen? Edit: Just wanted to say thanks again for all the hard work, if anyone is wondering if this is worth it, over even A1 Evo, it 100% is!!! I have a Denon s930h (no multiEQ XT and an older receiver) and everything sounds way livlier! This is an incredible application

[@ocaudiophile]

This is probably because your receiver is 7.2 and when you have tops, Atmos decoder thinks your surrounds are surround backs. To play the sweep where side surrounds are, it triggers fronts and surround backs together. You need to play SBL/SBR instead.

[@timothypoozhikala9791]

@ ahh makes sense, thanks again for all your hard work and help!!

[@miroslavpetkov9895]

Hello there. A question about measuring the two subwoofers. Do I just unplug or turn off the one, that I will measure second? Or how am I supposed to measure the both of them correctly? Thank you in advance!

[@ocaudiophile]

Yes you will need to mute all subs but one each time. LFE sweeps cannot distinguish between subs and all active subs will play.

[@NickHubb489]

All my crossovers have been set to 40htz..? Have i made a mistake somewhere.? thanks

[@ocaudiophile]

Nop, Nexus must have considered wall gains in your room.

[@mabehall7667]

OCA, thank you for this info. I can’t wait to try it on my Denon AVR. A question please. I intend to purchase mono blocks for my L-R speakers and an Eversolo A8. For TV surrounded, I should be able to feed the analog input of the Eversolo, using the Denon L-R preamp output, and still take advantage of the A1 Evo Nexus installation with Audyssey. But, when using the Eversolo to stream music or play a CD, the AVR will not even be on, so I need some correction for the speakers. Do you the think I can use the process of Convolution with Inversion you presented in an earlier video? The Eversolo has a DSP and they have instructions for installing REW files. For information, by connecting the system as I described, I only have one input into the mono blocks and will not need to manually switch inputs. I will use the 12v trigger from the Eversolo to turn the mono blocks on/off and the Eversolo can be controlled from my phone or iPad. Also, the DSP in the A8 is not on for the analog input, so, surround playback will not be affected by the Eversolo. Thank you, Mabe Hall.

[@ocaudiophile]

Sounds like a plan. I can see Eversolo has FIR filters so you can use the technique in that tutorial.

[@H1kari_1]

I just used it for the first time succesfully and the results are really a different level than regular Audyssey. Just incredible work, harnessing the power of REW this efficiently. Is somewhere I can donate? This works needs support. I have a question though. The levels set by my measurements are: Fronts: about +9 dB Surrounds about - 9 dB Subs: about -12 dB Could this be due to my dedicated surround amp only having 19 dB gain while my front amp has 29 db gain? Should I ditch my low gain amp and just get the same power amp as for the fronts?

[@ocaudiophile]

Thanks. I don't think you need to, you still have 3dB buffer each way but maybe exchange the amps between fronts and surrounds as surrounds' amp might be beefier (not knowing about the speakers they are feeding)

[@aptembe]

How does the output correlate with lets say a AVR with Dirac such as the Denon 3800 vs the same AVR with REW/ Nexus Evo

[@ocaudiophile]

Nexus outputs results not exclamation marks ;)

[@miguelmedinaramos]

Hi OCA! Thanks so much for this. I recall, from past tutorials from you, that we can use the center speaker (when available) to align distances and calibrations in REW. For that one should choose "C" instead of "FL" or "FR"?

[@ocaudiophile]

Sweeps send acoustic refenrrce to FR but you can find ones with C in older videos

[@bulletfaceLP]

I Dont know why, but i get thru the whole optimisation process. But it is getting stuck at: Optimizing EQ filters and generating expected final outputs in REW for each channel... I tried it on different machines and multiple times. Always the same result.

[@roughnek201]

Did you ever find a fix for this? I've tried on two different machines with two different browsers and mine gets stuck at the end when I believe it is supposed to create an ady file. But no luck so far.

[@bulletfaceLP]

@@roughnek201 yea i did fix it. I fucked up by not installing the beta of rew first. When i installed the beta it reset some settings. Most importantly the one for maximum measurements. Do make sure u set it to 500. 30 safed measurements are not enough for the script to work. After i changed that it ran flawlessly

[@roughnek201]

@@bulletfaceLP Got it. increased measurements from 300 to 500 but still didn't fix my issue.

[@bulletfaceLP]

@@roughnek201 hmm, then it seems like another error.

[@roughnek201]

@@bulletfaceLP Yeah, the software developer told me to uninstall, delete preferences and reinstall. I'm going to see if maybe taking that as well as the production version off of my machine clears the error.

[@SpookiSkileton]

Hi. Thanks for sharing your amazing work! One question: If I do the measurements through REW and then use A1 evo, does it make the difference between Audyssey versions(MULTEQ, XT and XT32) basically obsolete? It would seem that the version differences only apply to the measurements.

[@ocaudiophile]

You cannot do that. But Nexus will do everything Maestro does (and a bit more)

[@washflaf]

I have an insane amount of extra bass with Nexus. I must be doing something wrong as the final calibration trims subs to +8. I have 4 subs through MiniDSP and reduce the gain through dsp during Audyssey app cal to green zone. Bass is even louder in non DEQ version. Any ideas what I’m doing wrong? On a positive note, my bed layer and ceiling speakers seem much more time aligned with much better continuity. I think once I dial in the bass this will be substantially better than Multeq-X. Thanks to OCA for surpassing what a large company can do!

[@ocaudiophile]

Maybe use SWx +10dB sweep while measuring.

[@ranganathsr9922]

Hello, I ran the optimization tool and I got the following crossovers for my KEF Q350 L/R, Q650C Center, Q150 Sl/SR, Polk OMW3 top middle speakers and two SVS SB3000 subwoofers. Is this correct? All tutorials say that speakers should be set at 80Hz if you have subwoofers and here the recommendation is to set 40Hz for all and full range for front. Did I do something wrong? I had the subwoofers on while measuring other speakers. My polk height speakers doesn't even go anywhere near 40Hz 12:16:01 PM [IMPORTANT] Final crossover frequencies will automatically be set as follows: 12:16:01 PM [IMPORTANT] Speaker C: 40Hz 12:16:01 PM [IMPORTANT] Speaker FL: 'Large / Full range' 12:16:01 PM [IMPORTANT] Speaker FR: 'Large / Full range' 12:16:01 PM [IMPORTANT] Speaker SLA: 40Hz 12:16:01 PM [IMPORTANT] Speaker SRA: 40Hz 12:16:01 PM [IMPORTANT] Speaker TML: 40Hz 12:16:01 PM [IMPORTANT] Speaker TMR: 40Hz 12:16:01 PM [WARNING!] Please set 'Subwoofer Mode' to 'LFE + Main', set 'Bass extraction lpf' to 250Hz in your receiver!

[@ocaudiophile]

Apply all orange warnings manually in your AVR after you transfer the optimized ady file and start watching movies ;)

[@Estorki2]

You have another video correcting the phase into umik calibration file. You say nothing in this video. Do you recommend using here corrected phase file? Thank you in advance!

[@ocaudiophile]

Yes I do

[@alvysslp]

@@ocaudiophile Is it possible to apply this adjusted calibration file to the measurements afterwards (subtract the original one from the measurements, add the new one or something) or do the measurements have to be performed again with this newly created calibration file?

[@ocaudiophile]

@@alvysslp Why would you want to do that?

[@alvysslp]

@@ocaudiophile I understand the original comment here to mean that the corrected calibration file means an improvement in the measurement or its results over the original one, which would certainly optimize Nexus' calculations, or am I wrong?

[@Ghazkul666]

Great video as always and love the script ❤btw is there anyway to extract audyssey files from a marantz backup file somehow? Saved on USB

[@ocaudiophile]

Unfortunately they're encrypted.

[@Ghazkul666]

@@ocaudiophile ok :/ thanks for fast reply ❤️

[@RonaldSinnema]

What is the advantage of measuring at the volume you normally watch movies in comparison to the audyssey measurement (I believe this is at 75db?) I listen at -16db at my Denon.

[@ocaudiophile]

Preferred target curve is matched with "equal loudness contours": theproaudiofiles.com/equal-loudness-contours/

[@naamah-dh]

Your work is amazing but this is hard process to create the ady file, i bought an umik1 but I give up for today… 🤯

[@ocaudiophile]

You can do it! You will find solutions to most problems in these comments and also there's a FB group called "Audyssey One"!

[@elhawkjones]

When I Try to load my calibration file it says can't find REW . I reinstalled REW and restarted my computer and it's still the same?

[@joeydirt420]

Does it matter to the script that the time reference for your vlc files is playing out of the front left for me? You always mention its front right in the video.

[@ocaudiophile]

You are right, original sweeps had front right as acoustic reference but they were later replaced with sweeps which have FL as acoustic reference.

[@siberteeckhoudt9932]

When you take lets say 3 mic positions. And you do 5 measurements per mic position per speaker. Is it correct to make a VA of the 5 measurements, then Cross Correlate Align the VA's to the VA of the Central mic position. Then take a VA of the separate VA's of all three mic positions Use that VA as input for Nexus. Is this the correct way of working? OR Should you CCA all individual measurements to the central mic position of one of the measurements of the speakers central mic position and then make one VA out of all of them ?

[@ocaudiophile]

I don't think it would make a difference if cross correlation works correctly on them. I'd VA all same mic position measurements in place first and not CCA them before to compensate for small clock deviations.

[@SigiCZ]

1:02:00 at least on my x4100, the web interface can change the volume. Go "< Back" to home screen and click on the Main Zone, volume control is there.

[@ocaudiophile]

I'll check, really didn't know thanks

[@drsomparkashverma6174]

This is great...well done...lots of love❤❤

[@ocaudiophile]

Thank you!!

[@timothypoozhikala9791]

I have a more general question. How does something like this integrate with using a minidsp 2x4 to use Bass eq? Would you just run calibration independent of subwoofers then calibrate with the DSP after, or allow the subs to be calibrated in REW and sent to the ADY file? This is probably niche so no worries if there isn’t info on that!

[@ocaudiophile]

MiniDSP processing often introduces delays Audyssey cannot handle with its just 6m delay limit.

[@aecsummer]

One more question. I get this warning "[WARNING!] Please set 'Subwoofer Mode' to 'LFE + Main', set 'Bass extraction lpf' to 40Hz in your receiver!!" So I switch Subwoofer mode to LFE+Mains then the LPF for LFE only goes to 80hz on my AVR. I guess just set it as low as it goes (the 80hz) even when it say set to 40hz?

[@ocaudiophile]

No that's a different setting. The instructions are in the log (orange prompts)

[@wow70711]

I'm stuck at the mic centering part. The right speaker is my reference. When I move the mic and test the left speaker measurement, it shows the same distance no matter where I place the mic. I ran multiple left speaker measurements and they are very similar. I am using the audyssey mic and the denon avr-x1700h. Im losing my mind. Dont know what the problem is and why i cant seem to center the mic.

[@wow70711]

might be my windows settings with mic. I also used mic array as the default realtek mic had a low input in REW.

[@StuggiSuzi]

Man, OCA, can't wait to try this out, since your last release where so great! Question, i normally listen with -25db on my AVR, so for measurement i dial the same and 0db in REW to come out at 75db, correct?

[@ocaudiophile]

Yes, absolutely

[@satii24]

I am very new at this so I apologize if I am asking an amateur question, but what if we want to listen at a different volume rather than what was used during REW measurements? Do we need to retake measurements for the new volume or maybe use dynamic eq version of file instead?

[@stevenstevenson5053]

I know this video indicated 500 for maximum measurements. I notice mine has a ceiling of 300. Is this what others are seeing or is there something I need to adjust to have the 500 like you have mentioned in the beginning of the video at 1:30.

[@ocaudiophile]

Your REW is not up to date.

[@RonaldSinnema]

Tried Nexus with two subwoofers. Bass is almost completely missing. Is something miscalculated in phasing? Front sub set to 5.73 with reverse polarity. Second sub set to 1.72 with normal polarity. Second sub is behind my listening position.

[@ocaudiophile]

It's not related to actual distances but you might wanna check your original measurements if the bass is audibly bad.

[@manatee1714]

Trying to get this all working on a MAC Pro (Sequoia OS). Only issue are the 256k Atmos sweeps. VLC doesn't have a passthrough option on the Mac version (although Preview, Apple TV and Music now do). Mac has HDMI connected directly to Denon Avr but sweeps do not trigger Atmos mode on Avr. Is there a way of playing these sweeps on a MAC ?

[@ocaudiophile]

There's but I am not a Mac user. Try the FB group.

[@manatee1714]

@@ocaudiophile Thanks - have you got a link?

[@ocaudiophile]

facebook.com/groups/audysseyone

[@manatee1714]

@@ocaudiophile Thanks - I've requested to join

[@spatel30]

@@manatee1714 Hi, I am in the same boat. Did you find the solution?

[@PauloPHGTA]

First of all, thank you for the awesome work you are doing!!! Last time I calibrated my system it was with Supreme Audyssey, it sounded great but everything was manual, now I decided to try Nexus 2.5 but sadly I can’t finished my calibration, after clicking in the optimization button it ask me if I used Deq On, after that question Nexus just stucks and do nothing anymore, I don’t receive any message or warning aside from “Please keep Rew on SPL & Phase tab” and “Final calibration file will set deq on (or off depending from my answer)”, please help, I followed the tutorial and don’t see any way to fix this.

[@ocaudiophile]

You have to reply to that question...

[@PauloPHGTA]

@@ocaudiophile Thanks for the quick reply OCA, so regarding my problem I found a solution, turns out that installing the latest beta on top of my current older version of REW must have done something that messed up with REW, to fix it, I just deleted my REW and installed it fresh again, and it all work like a charm. I calibrated my 2 speaker presets and even made more than one calibration per speaker preset with different target curves, it all sounded awesome!! When I did my manual calibration following your tutorial of Supreme Audyssey, because of the receiver limitation to set the subwoofer delay, I wasn’t able to get the delay of my sub right, now Nexus got it right under 4 minutes!!! My system now sounds clearer, with more details and the subwoofer is much more accurate. This Nexus calibration is miles ahead of what Audyssey can do alone, and even better then the manual calibration of Supreme Audyssey, I never tested Dirac but I doubt it could be better, it probably beats Dirac too (after trying this calibration paying $600 for Dirac is a very hard pill to swallow) Again thanks for your awesome work OCA!!!, to think that A1 Evo Nexus is free is mind blowing, I would pay for such a good tool!!!

[@jmattingley23]

Can you clarify what mode the AVR should be in when taking my initial REW measurements? When I press the "Pure" button on my remote there are two options: - Auto (which switches to Dolby Atmos when I play the sweeps in VLC, and shows the Audyssey icon on the display) - Direct (which still uses the Atmos speakers but does not show the Audyssey icon) Based on your post on the AVSForum I assume I want Auto, since we want to correct against the mode I will be listening in (I never use pure direct), and when using the cleaned .ady file Audyssey is probably doing very little. I also assume if we were using Direct mode there would be no need for the cleaned .ady file since Audyssey is disabled. My only concern is that even while using the cleaned .ady file, my speakers still seem to have some crossover, and I can see my sub active when playing sweeps on my other speakers. Is this expected? I thought the rew mode .ady file was supposed to disable crossovers.

[@ocaudiophile]

AVR should be in Movie/stereo mode and REW measurement mode ady file should be transferred to it. AUdyssey must be on and in Reference.

[@jmattingley23]

@@ocaudiophile Ok, sounds like I am on the the right track. When I transfer the REW mode .ady file the Audyssey option on the AVR's web interface is grayed out and I can't click on it to see what mode its in, but I can see from the front display that it is on. Do you know why my subwoofer would still be active while playing other sweeps? Is that expected?

[@ocaudiophile]

No, REW mode ady changes all speakers to Large, just make sure bass mode is LFE and not LFE + Main

[@jmattingley23]

@@ocaudiophile Ah, I think that was my problem- it was still set to LFE+Main from a previous run , thank you!

[@joeydirt420]

If the cross corr align doesnt do anything do i still use the vector average? I am taking multiple sweeps from different mic positions for say my front left and when i cross corr align nothing happens in impulse. My vector average is the same before and after

[@ocaudiophile]

DIfferent mic position measurements will each look different and their vector average will look different to both, too. After cross correlation, the high frequency tail of the VA should rise up. You must be doing something wrong. Watch what happens during cross correlation in Overlays/Impulse graph. You can also reverse cross corr with "Undo t=0 changes"

[@joeydirt420]

@@ocaudiophile thank you. when doing the vector average what is the best way to do it. Do i record all positions and then align and vector average them all at once or do you do them one at a time?

[@ocaudiophile]

@@joeydirt420 Makes no difference, whichever fits you best.

[@StuggiSuzi]

Having a measurement with DEQ On, can i use this again for Nexus with DEQ Off? Or do i need to remeasure with DEQ Off?

[@ocaudiophile]

You will have to remeasure...

[@miguelmedinaramos]

Hi OCA! Thanks for everitinhg! :) I am using the Nexus v1.9, for the subwoofer REW sweeps, but I get the info "The measurement signal-to-noise is low 12,6 dB. Increasing the Sweep level may help." My receiver is at the -15dB, which is the my average audition level, and the SWs are on their "normal" level that was base for the Audyssey original measurements. What should I do to be able able to increased the REW sweep levels for the SWs measurements without jeopardizing the remaining speakers' measurements with the "Dolby Atmos REW measurement sweeps" levels?

[@ocaudiophile]

Subwoofers will always prompt that warning because of their very low response at high frequencies. You can safely ignore it.

[@miguelmedinaramos]

@@ocaudiophile just to give feedback on my test: I got no errors on the Nexus 1.9 log, but the file in the Audyssey app appeared as a "corrupted file". I used the same REW measurements in the v1.8 and everything went ok smoothly. The speaker distances were set more according with the true measures (v1.9 gives smaller distances) and the sound was great. Maybe I can send you the REW measures for your testing ;) Best! :)

[@ocaudiophile]

@@miguelmedinaramos V1.10 fixed that issue.

[@Dani-n8c9k]

Serko, thank you so much for this impressive script. I use it to calibrate my old Pioneer avr without audyssey using a computer with EQ Apo as DSP. My question is: I am thinking on doing phase correction of speakers before running the script (filter "A" is filter for correction of speaker FL, etc), rename the measures corrected (FL*filter A=FL, etc) and, at the end of the process, add filler A, B, etc to the filters obtained by the script (filter A * FL, filter B * RL, etc) Do you think that that makes sense? If it was interesting maybe the script could be improved by checking if, besides the measures, the rephrase filters are added by the user in rew and multiplying both filters at the end before packing the day file. I do not know if I am saying nonsenses, tbh I am not an expert on this field.

[@ocaudiophile]

That's something you can only manually develop at the moment. Next iteration will add phase correction but they will probably be just basic allpass filters.

[@Dani-n8c9k]

@ocaudiophile Yes, that was my point. To do phase correction manually with rephase as you instruct in one of your videos and combine with the filters calculated by the script at the end. The proposal for the revision of the script would be that it checked by itself if the user has added this filters (with the names that you decide for them) and, if it is the case, to include them in the process. If the user has not included them the process of the script would be as it currently is.

[@ocaudiophile]

There's a lot of demand for adapting Nexus to non Denon/Marantz receivers but it's more complicated than it seems, there are way too many differences in every brand. It's in the pipeline though.

[@Dani-n8c9k]

@@ocaudiophile I completely agree with you. The script provides the final filters but the user must introduce them in their DSP, I am using EQ Apo for that. But, believe me, your script is impressive (not only it, but all the information you give in your channel) and the only thing a user must do is get the final results shown on rew and pass them to their DSP. The only thing that maybe must be rethink is the part of the script that removes the roll-of filter of the avr. New Denon avr give the option of disabling this filter and the script always does their calculations as it was enabled what is giving wrong results. Anyway, my suggestion of including on the script the possibility of introducing speaker phase corrections by the user before running the script was for audyssey.users.

[@ocaudiophile]

@@Dani-n8c9k It doesn't apply soft roll off to Denons only does that to certain Marantz models. There's an anti reference curve applied to all models though which is necessary to cancel Audyssey's "high frequency roll off". If you are using Audyssey measurements in Nexus, then it will be a problem.

[@Time-Travelling-Lesbian]

How can I change the frequency response correction limit from 250hz or whatever it is to 20000khz in the nexus app?

[@ocaudiophile]

You can chemge end Frequency in the script but it's capped at 1000 whatever you key in.

[@MrRobertsonk]

Has anybody else had any issues with the Dynamic EQ Tool for windows. I launch the file and the script opens in a terminal window; but then closes again after 2-3 seconds. The file is in its own folder with the ady file that’s loaded into the receiver. Any thoughts? Thanks Kevin

[@alvysslp]

Go to the folder where you have the DEQ tool in it, right-click and open in Terminal. In this terminal window type in the name of the file and enter. If there are any errors you now should be able to see it in this terminal window.

[@Ademarcus]

A1 Evo Nexus 1st off my system sound great. Thanks for that :-) I'm having an issue using one specific target curve (TargetCurveOCAsoft.) I'm assuming that's one of yours. I can use TargetCurveOCA and a few others, but I like the levels and the slope of TargetCurveOCAsoft. Problem is that if I try to use it I get errors of "[WARNING!] Subwoofer SW1 volume has reached the minimum allowed level of -12dB. -0.5dB more reduction is needed for full Audyssey auto-levelling compensation." and "[ERROR!] Calibration results will NOT be accurate! Please decrease the gain/volume on subwoofer SW1 by at least -0.5dB and repeat SW1 measurement." This is the same error and amount (-0.5dB) for both my subs. Is it possible to change the target file (TargetCurveOCAsoft) so that it can work without drastically changing the characteristics (levels as well as slope?) The system sounds great except the bass needs a bit more. Again you kick butt! Thx in advance

[@ocaudiophile]

Just lower the volumes of your subs a little (from their volume knibs) before taking measurements.

[@ram4ns]

Popping and chirping sound comes while using ASIO4all. What could be the issue?

[@ocaudiophile]

play with buffer sizes

[@paulangelosy5790]

Hi OCA! When I click the optimization tab, it just tells me "Checking and sorting measurements in REW..." and when i check REW only thing that happened is it just made a C-Copy and nothing else, it gets stuck. How do I fix this?

[@ocaudiophile]

Probably a set up problem on your side. Do you still have it? I can have a look if you share your REW mdat file and the ady you're using.

[@roughnek201]

OCA, thank you so much for putting this out. One thing I'm seeing is that REW Sweeps from files are significantly louder than the sweeps run through REW itself. I'm finding that I have to turn my AVR was down when playing those. What should the SPL of the Sweep files be when I am running them?

[@ocaudiophile]

It's because they have 0dBFS volume level vs RE's default -12dBFS. These sweeps don't play loud in certain receiver models so were made louder. It's useful to take loud measurements.

[@roughnek201]

@@ocaudiophile Okay, thank you for taking the time to respond. I really appreciate it. One other question. I have four subs in my room, but my Denon receiver only has two subs. Should I combine them into one sub via the MiniDSP, Or, will the Evo script combine them into one sub for me?

[@ocaudiophile]

You will need MiniDSP if you don't have 4 sub outputs in the AVR (it's possible to use a y-cable and connect 4 subs as pairs directly to the AVR but the results would be varied). You can measure each of your 4 subs in REW and feed that to Nexus to get optimized distance and volume level settings for all 4 subs and then apply these settings in MiniDSP. Then measure all that as one single sub and re-run Nexus with it.

[@ThomasLeeb-u2t]

Hi OCA, I have some questions, hope you can help. 1. Is it thinkable to change the workflow like that. YOu take one set of Reference Positon Measurements and then combine them with Moving Mic measurements? 2. I am not able to get my Front speakers to small, as the delay of my Subwoofer array seems to big for Audyssey to correct. That´s a real disadvantage as I run 8 * 18 inches in a SBA and my fronts "only" have 1 15 inch woofer. So I loose alot of headroom here.. Is it possible to lower the set delays for the front (unitl it still can be matched with the closer surrounds), but that would free more delay time for the sub.. what is the max Delay audyssey can handle? 2. I changed the upper frequency limits in the script to 20.000 Hz, allowed 10db boosts, allowed high / low shelf filters, but at the end it is not possible to reach my set target curve. The upper frequency range shown after the optimization in REW always is some db over the target and it also does not quite match at other ranges. Can you tell the reason for that? Is it somehow possible to integrate manually created inverse filters from REW in the process and that these get transferred in to the finaly ADY in the "customerTargetCurvePoints" in all the channels? I really would like to have the option for a real fullrange correction matching my Target curves, that would be great.. Thanx alot

[@ocaudiophile]

MMM measurements don't contain phase information which makes them unusable for Evo. The available delay is limited by hardware, nothing Evo can do, you need to find a way to remove filters/wifi dongle etc from your subwoofer's path to improve its latency Evo limits HF EQ at 1000Hz even if customized to go higher. The default 282Hz will result in the best sound you will hear among all others, trust me, just fix your sub delay.

[@ThomasLeeb-u2t]

@@ocaudiophile Hi, I changed that limit everywhere I was able to find it in the script. Zeile 473: let endFrequency = 20000;// End frequency for amplitude correction filters (max. 20000Hz) Zeile 1205: endFrequency: endFrequency, Zeile 1218: if (endFrequency > 1000) (endFrequency = 20000); Zeile 1219: endFrequency > 300 ? smoothing = "Var" : smoothing = "None"; Zeile 1725: endFrequency: endFrequency, Zeile 1737: endFrequency > 300 ? smoothing = "Var" : smoothing = "None"; Why are you so sure that 282 will result in best sound? What if my speaker for any reason has 5 db to much in high frequency and I find that annoying? Audyssey out of the box or any other room correction system can fix that. I know that correction of High Frequencies can be an issue, but would be great to get the option at least. For my Subs, I have nothing in the signal path here, these are passive subs just hooked to amplifiers. According to time reference the impulse peak of the SW is 0,53 m away (later) then my FR e.g... So why this cannot be corrected?

[@ocaudiophile]

Did you find any audible problems in your results with Nexus?

[@krugorZ]

What gives better results Nexus or Supreme Audyssey Calibration?

[@ocaudiophile]

Nexus

[@elhawkjones]

Please let me know where I can download the atmos. Sweep files and the other files that you are using.

[@ocaudiophile]

Check video description.

[@StuggiSuzi]

Question regarding the REW measurement. Using your new losless sweeps in REW, do i stick to change the db to 0 in the measurement settings of REW, or at -12. And measuring one Subwoofer, the same with the sweep, and also 0-24.000 or 0 to 240hz?

[@ocaudiophile]

-12dBFS with the latest sweeps, all instructions in the changelog. Use always 0-24000Hz for everything.

[@StuggiSuzi]

@@ocaudiophile Got it, you are reffering to the screenshot in the changelog? And for the sweeps, when do i use, or difference, between the height speaker and Dolby speaker sweeps?

[@ocaudiophile]

People with Dolby speakers (I ain't one of them) claim, they get the best results with Nexus when they set them as top speakers in the receiver.

[@StuggiSuzi]

​@@ocaudiophile same for me, just 4 heigths, no dolby. So i stick to those sweeps. Thanks for the assist.

[@Squizzy911]

Thanks again for your effort and work! I have three questions: 1. At which volume should i measure? I am listening on absolute value around 45-50. I ve never used the relative scale. Is it linear to absolute? everything above -30db is so loud in my living room. 2. why is LFE sweep -10db and not -12dbfs? what is the difference? on the mkv bluray sweep file the subwoofer is fairly quiet . 2. It is easier to use your bluray mkv sweep file. I dont have to connect hdmi. But should i still use the SW Sweep from REW then? If yes, i dont get the purpose of the file tbh.

[@ocaudiophile]

1. The level you listen is the ideal measurement level for you, so stick with MV50 (that's -30 relative scale and equals 75dB). If you add dynamic EQ, will be a bit louder than usual. 2. LFE channel is boosted by 10dB in movies by Dolby decoder,. That's compensating for that.

[@Squizzy911]

@@ocaudiophile the LFE doesn’t feel so loud like the bass frequencies of my large front speakers. But maybe I am wrong. As a young father I didn’t have so much time to spend on it yesterday. Will do it again. Do you know what the timing issue ppm means? Is my laptop to slow. Never got that error/warning when I used my powerful desktop machine

[@ocaudiophile]

@@Squizzy911 Yes something in the lines causing excessive latency, try switching to ASIO4All, little less user friendly but works like a clock once set up correctly. If you have more than one sub, wait ffor Nexus 2.0 for better bass, I am fixing some bugs related to multiple subs.

[@Squizzy911]

@@ocaudiophile i dont have multiple ones. I am glad that my wife allowed me to use a 5.1.2 setup. But a second sub would be too much i guess :D and at the Moment i try to get the best out of my Budget teufel ultima Set 😅

[@aecsummer]

So I am a little confused on the check levels part. When I set my ARV to my listening level (usually -10 to -8db) and change the check levels to 0dB from the -12 default and check levels its WAY louder, like 95dB loud. Should I keep my AVR at my listening level and drop the dB in REW, or reduce the AVR level to get the check levels to the 85dB level?

[@ocaudiophile]

Use -12dBFS (REW default). The new Atmos sweeps are also at -12dBFS. I figured 0dBFS was a bit too loud for some people.

[@aecsummer]

@@ocaudiophile gotcha! It's interesting how different the output volume can be from different sources. Netflix on my Shield I have to listen to at +3dB and my blueray player is -15dB at times. All to get 85dB average. Just wasn't sure what would give better results, turning down the AVR or keeping the -12dB. I kept the -12dB so made a good guess!

[@svenausd4839]

Hey OCA, VLC ist not playing the MLP, nor the MP4 Files out of the meant speaker (for e.g. FHL comes out of the whole system). I used your mentioned settings, but it doesn't work. Do you know what it could be?

[@Adrian-vs7sq]

See from 21:40 minutes: Maybe you need to change something:

[@MrRobertsonk]

Non Audyssey system: OCA: I've seen in other posts that you can force an ADY file to look like a 2.1 system for example; and that you could then run Nexus and take the volume and distance settings to manually input into your non-Audyssey receiver/stereo. My question is regrading the EQ settings which I know you said would be v tricky! Would there be anyway of extracting them out of REW once Nexus has run and inputting into a convolution file for use in Roon or JRiver? That would be a great workaround for more manual audio systems using these high res players. Just a thought 🙂 Thanks Kevin

[@ocaudiophile]

Yes you can see applied PEQ filters in the notes of filters in REW at the end of optimization.

[@MrRobertsonk]

Thanks, are the filters the REW files with a “o” at the end eg:FLo ? Or is it the files ending with “channel” ? Or the files names FR etc

[@ocaudiophile]

They are the ones with no suffixes. FL, FR,...

[@MrRobertsonk]

Great, thanks. I’ll give it a go. I was also thinking of trying it out on my car stereo system for fun; but my Helix DSP can only process PEQ entered manually, so it I’m presuming it won’t work as there will be too many EQ points in REW/Nexus?

[@nudelgericht09]

Danke!

[@ocaudiophile]

🙏

[@cableffm]

Hey OCA, I've already asked this at AVS, but the question probably got lost in the general anticipation for Nexus :) For users with TS/CH speakers: In order to be able to play the sweeps on these speakers, would it be possible if I take the sweep from e.g. FHL (or any other speaker except FR) by simply rerouting the cable from the preamp to the power amp accordingly? Thank u so much :D

[@ocaudiophile]

Cable routing works but timing information will be wrong, needs to be manually fixed. You should be able to play TS by TML & TMR and CH by FHL FHR sweeps though?

[@CorbyPage]

@@ocaudiophile Why would timing information be wrong? As far as Nexus is concerned, the information was captured at the TS/CH channel, right?

[@ocaudiophile]

@CorbyPage I remember that problem the days when I used to switch banana plugs before the atmos sweeps. But when I think about it, I think you're right ;)

[@aldofigueroa4758]

@@ocaudiophile Hi OCA, Those that say Top when you configure the receiver as atmos are heard in height, either Front or Back, but on the sides, never in TS or CH. In any other configuration (including Auro 3d), the top files sound in the surround channel.

[@ocaudiophile]

@@aldofigueroa4758 Switch plugs for TS and CH.

[@AbhishekSingh-fw7fv]

Hi Serkan... i was away from my system hence late in adopting Nexus... need help with : Once I have the measurements in REW how do I generate the ady file for nexus to optimize... couldn't clearly follow the steps of triggering the Nexus to optimize the measurements... or is it that we have to use a dummy ady file to trigger Nexus and then it optimizes the readings in REW

[@ocaudiophile]

Just upload any ady file you have handy with the similar amp assign / speaker configuration

[@AbhishekSingh-fw7fv]

@@ocaudiophile Hi Serkan... I have completed the process using NEXUS Final version with the following outcome : FL : 9.2 ft, +0.5 db, FR : 12.5 ft, +4.0 db, C : 9.1 ft, -5.0 db, SL : 26.5 ft, +5.0 db, SR : 21.3 ft, +3.0 db, TML : 17.3ft, +5.0db, TMR : 18 ft, +4.0db, SW1: 23.4ft, -3.0db... I have a perfectly symmetrical room and the relative speakers are placed almost at the same distances (from MLP : FL&FR :12ft, C :13ft, SL&SR: 4ft , TML&TMR : 6fts and SW:13ft next to FR :... I thought NEXUS is time aligning but while testing to get centre imaging I had to actually change the distances to match relative speakers.. i mean Fl=FR etc. I am doing something wrong for sure.. My setup : Denon S960h (7.2), Wharfedale Diamond series towers and centre.. using stock Audyssey Mic... Few very simple questions : 1) My Surround and Atmos are way too off distance wise 2) While i play the sweeps the 1st noise is from ref (FL) speakers and then the speaker being measured (hope this is how it should be).. Is there something that you are seeing as a miss.. One true winner is the SUB (is the best that it has sounded till date)..

[@AbhishekSingh-fw7fv]

Hi Serkan : GDrive links are getting removed :-(.... Not sure if the problem statement in my previous comment can lead you to identifying the issue... if you can just point me to the stage at which i am erring..

[@siberteeckhoudt9932]

To start with thank you for all the hard work you put in to this! I have a question though. After running nexus some of my speakers are crossed over below their spec sheets minimum Hz range. Should this be adapted after Nexus ran? E.g. center channel is 40hz where datasheet says 90hz Dolby atmos reflekt speakers are set to 100hz where datasheet says 150hz. Can you give a bit more explenation on this? "Above crossover settings are calculated to be optimal. If you wish to change them, use speaker XO customization tables inside the script." Please advice, tomorrow I will test the results.

[@ocaudiophile]

Room gain is added to your speakers and Nexus shows where their bass roll off starts in your room. If you want to change the crossovers, do it by customizing the script. There're instructions in Evo Maestro logs on how to do that or you can read the comment lines in the script.

[@siberteeckhoudt9932]

@@ocaudiophile worked like a charm, want to be sure that outputted stuff is not distorted by exceeding speaker specs. Will be testing later today. thank you so much

[@siberteeckhoudt9932]

@@ocaudiophile after Nexus has ran, and I set my LPF for LFE to 250 and Front (full range) to 250 as Nexus says.. What setting should i set under audyssey=>MultiEQ XT32 => Reference, flat, off, bypass L/R, .. Also, I find the LFE effects are a bit on the underwhelming side... what is the best solution to correct this without losing balance. (Denon AVC-3700H) Please advice. The overall sound on the plane and Atmos is already night and day. Expect a contribution for your hard work.🙏

[@ocaudiophile]

@@siberteeckhoudt9932 Audyssey should always be set to reference (the optimized ady file already does that for you). You can increase the volume of the LFE channel if it's not already at 0dB. If it is, then just increase sub volume as much as you want.

[@siberteeckhoudt9932]

​@@ocaudiophile now running the 10db curve and that set my Subbs at -2 -8 which I set to 0 and -6 now. running dual Teufel S6000SW in THX mode. with ultima40 front, centre and ultima 20 for surround and surround back, reflekt for atmos. 7.2.4 in other words. Is it normal that I have to screw the bass up that much to get some feelable impact of the subs. e.g. fly over at beginning of TopGun Mavrick (bluray). These subbs are supposed to be already a bit of overkill for my 6x3m setup in the livingroom which is larger than the setup floorplan. wondering if the LPF for LFE and Front (large) both set to 250Hz might be the cause ? I find the Harman Kardon curve overall more pleasing to the ear, especially for music, but lacking bass even more for Atmos movies. Please advise me on this one last query.

[@roughnek201]

Is anyone else have issues with trying to move measurements? Whenever I try to drag a measurement to a new position in order to vector average, none of my measurements will move. I see the dark outline showing where it should be moving. But when I release the left mouse button the measurement stays in place. None of the measurements have a lock icon or anything on them. Been banging my head on this for past 15 minutes but can't see what I'm doing wrong.

[@roughnek201]

If anyone runs into the above issue, I was able to get around it by going to the SPL & Phase window and dragging the measurements into the proper order there. Switching to the ALL SPL window showed them in the new order.

[@KillerSneak]

I see the file has been updated to 2.0 today. Is there any way to keep track of previous versions? I’m interested as what has changed in the code going from 1.1mto 2.0 instance. And seeing the GitHub isn’t active anymore there’s no way to keep a version history as of now? If there’s anybody in the comments that has the older versions of the file can we have it shared here please?

[@ocaudiophile]

Check the changelog

[@KillerSneak]

@@ocaudiophile I have seen and read the change log but as a coder myself I’m more interested in the code that has been altered, not a condensed explanation of what the changes are meant to be doing.

[@spatel30]

Hi OCA, do we have to center the microphone before taking measurements? The reason I am asking is that my MLP is currently not centered between FR and LR. So I am wondering if it makes sense to measure by setting mic on MLP, which will not be centered OR put mic between two seats which will be centered between mains.

[@ocaudiophile]

Measure where you sit but this is a difficult position to get great sound.

[@spatel30]

@@ocaudiophile ok. Thank you. Have a four seats and MLP is the 2nd seat. Currently, the FR and. FL distance measured from this seat is 13.1 and 13.6 respectively. Would that make a huge difference in sound if measured from MLP as you mentioned?

[@isak6626]

Did I understand it correct that you have to manually sort, cross-correlation align and vector average your measurements before starting the optimization? Didn't Maestro do that automatically? 😊

[@StuggiSuzi]

Wondering the same, why that is not automized?

[@gbye007]

That's ort of the point of this version - it gives you more flexibility with measurements. OItherwise use Maestro.

[@isak6626]

@@gbye007 I see. But that sequence of procedures is what takes time. A lot of time. Would be great if you could just take the measurements, name them and let Nexus take it from there.

[@gbye007]

@@isak6626 I feel priveledged to have what's here for free already.

[@ocaudiophile]

REW can be forced to take measurements with the API but that requires the pro version.

[@dovydasvilkelis6881]

Spent half of the last night of watching a tutorial and taking my measurements. Went to the office with red eyes :) I will do more after calibration measurements later, but I wanted to ask why it sets my both subs -8 db lower than MultEQ and A1 Maestro? I do have two SVS SB-3000 and their level is set to -17 db and -19 db, basically right in the middle of MultEQ XT scale during Audyssey calibration.

[@eleckson]

Does it sound 8dB lower, or too quiet in general? When messing with MSO a while back, I noticed Maestro started setting my subs lower. Still, they sound just as loud, if not louder. Volume knobs remain the same. I assume maybe since MSO cleared up lots of the nulls and dips, Maestro maybe had to boost less to achieve the same perceived loudness. Maybe Nexus was able to align your subs so much better than Maestro, that it was able to reduce the trim on the subs by 8dB and still maintain target levels?

[@ocaudiophile]

Nexus has a quite different volume alignment algorithm and then there's anti Audyssey auto-leveling added to each speaker/sub volume. Each setup is unique, don't get stuck with figures as mentioned below, listen to your system first.

[@dovydasvilkelis6881]

Yes, you can hear it. That's how I noticed it in the first place. In the beginning I thought that I forgot to turn on my subs after measurements. There was no bass at all. I increased those values after calibration and now it's back.

[@l.c.n]

@@dovydasvilkelis6881 Not sure if this helps, but my first try with Nexus 1.0 and original sweeps gave me a SW1 and SW2 at - 6 dB, normally all EVO versions after 1.3x has been around + 2dB. In other words not much bass there. So yesterday I redid measurements, same as before, 3 measurements pr speaker without moving mic. But yesterday I used Nexus 1.1 and the new trueHD sweeps. And in the ASIO4all setting ticked the always up sample to 48kHz box (did this since REW gave warning about sample rate, don't know why, it didn't the day before). Results were SW1 and SW2 back to + 2dB and great bass again. Not sure what did the trick or what happened the first time. But maybe you just need a second attempt.

[@dovydasvilkelis6881]

I redid all my measurements with latest Atmos sweeps. 3 measurements per speaker per position (99 measurements). I ran Nexus 1.7 and now it sets SW levels exactly 8 db higher, so I guess it was something with either my previous measurements or a first script version. Thank you for the help. I'm just not sure why some Nexus versions ask me to change SW1 polarity and others ask to leave it as it is. If I do it, I have a big drop in bass region, it looks like SW cancels out each other? Not a big problem, just curious :)