Obsessive Compulsive Audiophile
Obsessive Compulsive Audiophile
Erratically sharing my digital room correction expertise and experiences here.
The hobby is to chase better sound and I also do some listening during the chase.
You will learn many tips and tricks for the Room EQ Wizard aka REW, rePhase, Audyssey as well as state of the art techniques for both stereo and surround systems correction and equalization including Dolby Atmos. I use a Marantz SR6015 in my home theater system and use Roon for stereo music listening. Most Audyssey and multichannel techniques can be applied to all Denon & Marantz models. Manual calibration techniques can be applied to most surround receivers including Yamaha, Onkyo, Pioneer, and Sony.
Please note, I'm not particularly amused with video editing, and English isn't my mother tongue, so please excuse any lack of polish in the presentation. However, I'm confident you'll frequently discover content that is extremely interesting and unavailable elsewhere.
OCA
Пікірлер
Been a subscriber for a long time and was one of the first to be amazed by Evo1 a few months back. Like others, I eagerly tried new releases, though honestly kept going back to one of the first (v1.3) releases because the bass had seemed less punchy in HT thereafter. Came back this week to find so much further progress and decided to try MJ! I've used the same .ady as before, but was surprised when my first run told me to use the Fronts Full-Range, but switch to LFE+Main for bass output and LPF of 120Hz. I've seen others ask about this and the response was just try it. I also re-optimized with LPF capped and got the same thing but told to use LPF 250Hz. I tried with fixing Fronts to small and that optimized at a XO of 90Hz (much higher than the 40Hz I used to use) but wanted me to invert my subs (never saw that before). Lastly I switched from the default MJ curve to the Harmon curve with no fixed settings (nothing checked) and Evo1 automatically used small fronts, a 90Hz XO and no sub inversion rather than Large fronts with LFE+Main setting it first suggested. I've tested a few of these options and they all sound good, but what sounds best really depends on what I'm listening to and when i listen, so I'm a bit lost now on choosing. Thought to ask a couple questions, especially as others might be interested too. 1) performance wise, are there expected advantages to having Fronts as Large full-range if you are still cutting the bass of Mains off at an LPF of 120Hz? Vs. just doing Small and the associated XO? What might I want to listen for to compare? 2) does it make sense that just switching target curves results in a very different output configuration? Is the MJ curve optimized in some way to allow the Evo1 script to work a certain way? Many thanks again for all your effort!
120Hz LPF setting is a filter on the subwoofer, fronts work full range in LFE + Main. Newer models have a separate setting in their menu for that (bass extraction lpf), with older models, you adjust it from front speaker crossover setting. I agree it's confusing. I recommend LFE + Main / Large fronts setting for the best bass unless you have a weaker receiver or your fronts are not floorstanders. Target curves are a matter of taste and your sub's natural response shape really. MJ curve is just an average for the very high number of speaker responses I have seen over the months.
QQ, Does it compatible with the Denon S970H? I didn't see in the list within the script. Thanks for this!!
If your receiver works with MultEQ Editor app, it will work with Evo.
Comparing my presets from my old one to yours, the master copy it’s like night and day a whole Nother level amazing
Long time observer first time commenter. What you have done is mind blowing, taking weeks of painstaking diligence and turning it into a quick 10 mins process. The time you have saved us all is immeasurable. Question, my receiver has 2 sub outputs but I have 4 physical subs, how do i integrate a minidsp into this process?
kzread.info/dash/bejne/dqOat8uBqpqspZc.htmlsi=b3TDf9BPkTmyWRbl
First connect one of the AVR sub outputs to MiniDSP2x4HD (IN1 or IN2), Set the GAIN on each sub to 12 o'clock, GAIN match each sub by putting your Microphone the same distance from the center of each sub, use REW to generate a signal and MiniDSP2x4HD to raise or lower the GAIN. To determine the best location for each of the subs place a sub at the MLP and using REW generate a signal and move the microphone around the room. That's how I did it.
The "uber" thanks much appreciated! Plug all 4 subs in minidsp which Audyssey sees as SW1 connected to preout sub1. Run MSO on Minidsp with "NO" EQ filters, no allpass filters and a maximum delay limit of 5ms, inversion allowed. When finished run your Audyssey calibration and feed that ady file to Evo.
@@ocaudiophile Hi OCA, what is MSO? there is a tutorial for it from your side? I'm struggling trying to align 2 subwoofers (one on the front, other on the back of my room), many thanks!
@@Yo......... Multiple Subwoofer Optimizer. It's a free tool to do what you exactly need. You can find a good tutorial video about how to use it here on YT.
The sound is amazing but, I need more treble, any chance to have to setup that better ?
Tone controls work with Atmos but I think only for the front mains.
Do you mean the tone control appear on option menu only in Atmos conditions ?
Ok, I find it. It’s on master, not on the 0db
@@lodedh9227 Yes, it doesn't work with DEQ!
Mac owners can finally use these Atmos sweeps: www.macrumors.com/2024/07/03/macos-sequoia-supports-hdmi-passthrough/
Haven't tried it yet as I want/need to make some changes to my living room first, which will probably take a few months, but I just wanted to say thanks.
Cheers!
It takes 5 min.
Following all instructions for Maestro but Optimize button does not come available to click. I've tried on Chrome/Brave/Edge and on 2 different pc's. I ran previous versions of One with no issue. Server is running on port 4735. Is there something else in Preferences I need to change to get it to sync?
Never happened to me. You can ask in the fb group.
Audyssey One
Make sure you have dragged the Audy files into REW from wherever the zip file is and selected a Target curve in EQ
@@craigmoritz1574 I got it working. Thx. I didn't bring in the mic file from the. ady.
@@danielmarshall8255 What mic file do you mean? There is only the ady file to import?
20:11:58 [INFORMATION] No distance value was found for speaker C in the calibration file. It has been temporarily set to 2.75 meters. What? used the same audyssey cal file from the last Evo versions which worked great
I had the same you have to change manually the distance in the Audyssey .adj file for your center speaker 1cm lower
Can MultEX-X be used instead of the Audyssey App? I thought you said no because they are encrypted in a different post, but I found this on your GitHub, so I may have misunderstood. "MultEQ-X measurement extractor by OCA"
Mic calibration file is encrypted and cannot be imported to REW, that deviates all measurements by an unknown factor.
@@ocaudiophile The file from the calibrated mic that I bought to use with it is encrypted but the measurements are not. That correct?
Sir, when compensating for XO/port/box, is the goal to find the best filter for your speaker parameters? Or is it to make the excess phase as close to 0 as possible? I have 3,5 way ported design. I get much flatter excess phase when correcting only for my 2 XO points (2500 and 250) and not correcting neither 3rd XO (80Hz) nor port (which I guess is around 30-36Hz, I tried them all, using box correction as well as 1st order all pass filters). Thank you for everything <3
All will improve the sound but I would list all xo frequencies and port frequency twice under min. phase all pass filters and play with 1st and 2nd order normal and compensate mode combinations which yield the flatest ep response. Use only 0.707 Q for 2nd order. If you really need to, you can double that to 1.414. Finding a solution using only these Q values guarantees correctness of the filter.
Thank you. And does it make sense to aim for flatness based on averaged LR EP if in the bass region (say, 30-60hz) left speaker exhibit vast difference from the right one in terms of EP (and even MP, in symmetrical room/setup!)? Am I not better off correcting xo/port/box for each speaker separately? (Or, instead I can tackle bass in "aligning speaker phases with each other" step…)
@vorpane The crossover and port/box corrections should be identical in both speakers by definition.
Thanks! Love that you shared your script.
Man, you keep doing this! Many thanks....
OCA thank you so much for this! 💕💕💕 #updates -- if you have problem like below (MacBook Air M1, use Chrome instead of Safari) REW V5.40 Beta 50 running Azul Systems, Inc. JRE 1.8.0_422 64-bit on OS X 14.5 Locale: language en, keyboard US, UTF-8 on 1440x900 at 127 DPI Running in /Applications/REW Message: java.lang.ArrayIndexOutOfBoundsException: 0 Stack Trace: 0 roomeqwizard.iF.run(y:2981)
With the newest Version and the harman 10dB curve, A1 Evo MJ is back at its best! Thanks for that, sounds great. Is it possible or makes sense to combine the solution with VBA shown in another video of yours? I have 2 subs, on a THX certified subwoofer, so it just needs compensation for frequencies that are resonant and there has the other sub on the other roomside his advantages, so I was wondering if there is a chance to further optimize the result. I have a miniDSP 2x4 here to something on top. Any suggestions?
There's no way to apply a custom FIR filter like VBA to these multichannel amps :( I've been working for a solution to take full control of Audyssey's FIR filters but success chance is not very high (if any) at the moment.
Thanks for your incredible work @ocaudiophile! I just ran the latest published version of A1 Evo. It told me the following: “[WARNING!] Please set 'Subwoofer Mode' to 'LFE + Main', set 'Bass extraction lpf' to 110Hz in your receiver! On my Denon AVC-X3700H it does not have the 'Bass extraction lpf' option, it only has the “LPF for LFE” option, which from what I was researching is for something else. Any suggestions on what to do? Thank you!
Set front speakers to large and their crossover to 110hz
@@ocaudiophile Perfect. And do I change the set option 'Subwoofer Mode' to 'LFE + Main' or leave it 'LFE'?
LFE + Main
Danke!
🙏
@@ocaudiophile Vielen Dank für deine Mühen! Du hast meinem alten Denon seinen zweiten Frühling beschert und meine beiden SVS PB13-U noch heftiger performen lassen. Dirac muss doch noch warten…
Thanks!
Thanks!
The subwoofer integration is perfect. You continue to provide improvements that make my unchanged system continue to surprise me with what its capable of. Less time tinkering and more family enjoyment because of your work and providing it to the community. Thank you again for your work.
🙏
Is there going to be more versions after Maestro?
No!
@@ocaudiophile lol
Hi Oca, I have an interesting question. What changes if you change the "suboffset" value inside the script, rather than increasing the subwoofer level once the calibration is finished in the AVR? Is it the same thing?
Suboffset is long gone from the script. Are you using a recent version?
@@ocaudiophile I'm using the latest maestro mj version. In my imac if I open the script with the text editor, at line 9270, using the search words function, I find the variable const suboffset rmsvolume.
@@ocaudiophile what do you thing?
This looks very interesting, though I'm not sure where starting right now. I've just bought a Denon 3800H, but yet to be plugged in. To go with a 5.1 setup (2 front Focal Chorus 816v, 1 centre, 2 at rear 806vs instead of side as dont have room on the side), with a BK monolith sub. I seem to remember on my old (now broken) Onkyo 607 receiver that I had to set something between Small and Large, and/or 6/8ohms but I cant now remember what it was as it was approx 10 years since set that up. From what I gather, I need to 1) obviously get this plugged in and a basic out of box setup (will have to see if I can find any old notes on the small/large etc options). 2) Do a basic Audyssey calibration from out of the box within the menus, 3) buy the Play Store app for the £20, run this to get a copy of my current config, 4)download the files to pc and run your great looking app, 5)sync these modifications back to the AVR
You only need to set 'amp assign' correctly. You can even run the very first calibration from the Multeq app also no need to ever change ohm settings with your Denon.
@@ocaudiophile Thank you, its a steep learning curve for an idiot like me :) I've found some of my old notes and can see I should set speakers to Small anyway for the sub to deal with the low freqs. From what I gather, the 3800H does height virtualisation for my regular 5.1 too etc which I assume is best turned on etc, but I'm sure it will make more sense once I've installed the AVR this weekend and had a play about actively using them. I've bought the app in advance ready
He is correct in stating that you should not change your ohm setting. Always leave it on 8. If you change it to match your speakers you will lose a lot of power.
@@m4nc1n1 Thanks bud - everydays a school day :)
Hi OCA, Should a user first do / follow these steps that you recommend in this video >> kzread.info/dash/bejne/mZVmx7GwerXaiNI.html and then/after that to do everything else that you recommend in this video and with the HTML file? Thank you very much in advance. I really thinkg that it will be great to have this as step by step guide of the whole process in optimizing multiple subwoofers in a system.
No, you don't need this video. Just run the html script with your original Audyssey measurement. If you want to align multiple subs, instructions are in the download folder linked in the video description. There's also a Facebook group where you can get help on all sorts of questions and problems.
@@ocaudiophile thank you so much for everything you do and did so far! You are the best expert matter that I have evere found. Explain everything easily and to the point.
I have one more question. I want to remove the rear sub from the loop and use only the two front subs. Can I delete the third sub from your output file before I import it to REW, or do I have to re-run Audyssey with just the front subs active?
You will need to rerun Audyssey. Try directional bass mode if you can.
@@ocaudiophile I will. Thank you
@@ocaudiophile So, I eliminated the rear sub and re-ran Audyssey 8 positions. This time, when I ran it through your program with only the two front subs, it did not ask me to change the phase on my subs 😉. I'm going to watch a movie tonight with the Wife and see how it sounds compared to before with the rear sub. I'm also testing the transducer option on the Cinema 30 (they were just jumped off the rear sub before).
Hello OCA, have you herad about freezing during the calculation process yet? Downloaded th newest version from your drive this morning. Here is an excerpt of the the log. The last entry is the point the calculation freezes. 10:17:00 [IMPORTANT!] Optimization started... 10:17:00 [WARNING!] Please keep REW on 'SPL & Phase' tab, close any child windows and stay on this web page until optimization is completed! 10:17:16 [IMPORTANT!] 'Standard bass' mode with '2' subwoofers detected. 10:17:16 [INFORMATION] Transposing measurements from <8> different microphone positions to the primary listening location (1st mic position)... 10:17:16 [INFORMATION] This will take a while but ensure 'direct sound' is prioritized for every measurement impulse. 10:23:07 [INFORMATION] Computing optimal spatial averaging configuration for speaker #10 10:44:27 [INFORMATION] Executing precision temporal alignment across the speaker array for optimal coherence.. IN REW the last proces step is 20 --> Q Swmiso -EP Thanks Sir. ADY File: drive.google.com/file/d/1sLyPBPzyKezv80PuN3AK592hz1Qj4deH/view?usp=drive_link
Never seen before with the MJ version, what REW version are you using? Can you share your original ady file?
@@ocaudiophile , thanks for the prompt answer. Using now REW 49, previously 48 but issue was the same. No version before MJ showed that behaviour.
@@ocaudiophile first post amended (ADY file link)
Your ady file works smoothly and finishes without any errors with default options and also with force MLP. option. Something must be wrong with your set up. Make sure you have the latest version of MJ, clean install REW Beta after uninstalling from REW's own uninstall tool and deleting preferences. Save the imported measurements in REW as mdat file and "remove all" and load back the mdat file for each run of optimization. Btw, you should defo try directional conversion script with two subs!
@@ocaudiophile thanks, got that. MJ is the latest (from today), REW has been uninstalled / installed as it should be. As mentioned before, every version before MJ worked fine. Might be soething with my PC. Question, ist it posible to use the ady file I provided the link to to use the directionals conversion? I alternatively already created two ady´s, one 8 position measurements for each left and right sub only. Does the script work with those? Further to that, can you share me the mdat you got while running my ady through your PC? Thanks Sir.
Releases from the past couple of months have been, well, crappy. I did switch back to MultiEQ-X for a while and just enjoyed things. Today I decided to give the latest version a shot and it's finally back to the quality of your orignal versions! Sound stage difference is wildly different than my MultiEQ-X calibration! Keep this direction up! :D I'll need to tinker with REW to verity your inverted and distance (3ms more delay and inversion removed) to see how the curve looks, but for now my ear says it's decent!
Hello OCA, Thank you for continuing to improve! One thing that has me confused however is I see people doing directional bass calibrations... I calibrated my system with standard bass management, as I was always told directional isn't optimal. Should I recalibrate using directional? I have a Marantz Cinema 40 with individual sub outs going to 2 SVS PB1000 Pro subs.
Directional mode is converted to standard by Evo. It's a hack to get the measurement data for the second sub which is hidden in standadr mode Audyssey calibration. Switch on directional mode on your Cinema 40, run an Audyssey calibration and feed that ady file to Evo. The optimized ady file will be standard mode and with better bass than the current one.
Hi OCA, this is amazing; things have certainly moved on significantly in the past 12 months since I last followed your guidance. My Denon AVC-X6500 has now been given the A1 Evo treatment and its awesome for movies in Auro 3D mode. One question though for when I listen to music through the receiver. Currently I use "pure" mode which disables all Audessey filters etc, then I rely on convolution filters built with Accourate via Roon. If I was to play music directly to the amp without those filters and just leave the Amp in Stereo mode (not pure), how would the A1 Evo settings perform for just stereo audio? I was also looking at producing some new filters (to possibly replace the Accourate ones) for audio using your Mastering Digital room Correction method, is this worth it or would the A1 Evo settings perform equally well in stereo mode. Many thanks Kevin
You can better Evo filters with Roon and Acourate. If you cannot, try harder ;)
@@ocaudiophile Would you expect the results from your Mastering Digital Room Correction method, to be similar to Accourate or better?
@@MrRobertsonk I don't use Acourate other than for mic alignment during calibration ;) Although I know it's very capable, REW already has all that you need.
Hi Oca,what changes if you set the audio target 1 or 2 on the app? on audio target 2 the curve is decreasing in the high frequency, but if the script intervenes up to 250 hz what's the point between the two target? Thanks for the beautiful work
Evo will reset the target to 1 no matter what you have changed it to and then apply an anti filter for it for flat adjustment. You should not change enTargetCurveType to 2 in the Evo optimized ady files.
Not that is matters.. just wondering why: The log says this: "[WARNING!] SW1 7.61 meters, please SWITCH this subwoofer's POLARITY!". But the generated ADY sets sub distance at 7.59 meters.
Strange. Are you using the very latest upload of MJ?
@@ocaudiophile yes. Newest version and rew beta 49. 360hz correction, maxboost 3b, custom crossovers and force large. Dirac 8db curve.
Unbelievable!! I had no idea my MiniDSP 2x4 could do phase correction with bi-quads. Incredible knowledge, thank you!
Thanks!
Welcome!
Hi OCA! Thanks for all your fantastic work and support. I have a question that I'm hoping you can help me with. I'm used to always matching the speaker levels after calibration using the SACT disk. However, when I do this now after using EVO, regardless of the version, I get very large differences in levels. For example: 75dB After EVO MJ After level matching FL -1.5 -1.5 C -3 1 FR -3.5 0.5 SL -2.5 4.5 SR -3 5 FHR 1 8 FHL -2.5 7 TMR -2 6 TML -1 6.5 RHR 1 7.5 RHL 1.5 8 I kept my FL speaker as the reference point and adjusted all the other speaker levels to match. Do you have any idea why these differences are so large? Or am I doing something wrong? Thanks again for all your help!
Keep Evo set volume levels, they are exceptionally accurate. If you are using receiver's test tones for your evaluation, they completely bypass all filtering and are uselss. If you're using some sort of pink/white noise, they are band limited.
@@ocaudiophile Thank you for your quick response. I'm not using the test tones from my receiver, but rather the Spatial Audio Calibration Toolkit, combined with a UMIK-1 and REW to measure the levels. Should I still just leave the levels as they are? The Atmos levels, in particular, are much lower than the other five.
Download and play the Atmos test tracks from the link below. They will give you a real indication of accuracy of the speaker levels. They are playable from a USB key by most Bluray players. If you are not happy with the results, try running Evo with "force 1st mic position" option. In the case that your calibration file has some faulty measurements, this will bypass them. drive.google.com/drive/folders/1-UndPKtH-Ld0UlQEYjLuld3rz0gS5CYc?usp=sharing
Thanks!
Thanks!
I have a 5.0 in my bedroon with the Maratntz Cinema 70s. I did not know this needed a sub to work. That is why I asked if it only did bass. So it donly corrects to 100Hz? 9:00:23 PM [ERROR!] No subwoofer detected in your calibration file. The tool cannot complete optimization without a subwoofer in the system!
It needs a sub because it's mainly a hone cinema calibration tool.
Well you've just saved me a lot of time, i don't have a sub in my current setup yet either.
@@ocaudiophile yes i understand. That’s what i have a 5.0 system in the bedroom. Just no subwoofer. Oh well, it worked pretty good in my home theater so thank you for your work.
@@m4nc1n1 Well, you need a subwoofer of some kind at least for the first Audyssey calibration. Then you can run the Audyssey One Evo script, transfer it on your AV receiver and set the subwoofer to "no" in the menu, then the front two speakers are automatically set to full range.
@@vortexor1 I can do that. I have an extra sub lying around. Also I think in my main theater I will disconnect the third rear sub and just run the calibration with my two front subs just to see the outcome. The rear sub was not needed for the room, I just had it and figured I would use it.
Hello Serko. Thank you for all you do. Question: I get this with MJ. What can I do to fix it? I still have my MiniDSP 2x4 connected. Should I take it off and run MJ? Would that be better? [INFORMATION] Required delay @61Hz is outside limits: -9ms [INFORMATION] Crossover frequency: 80, alignment not possible within delay limits! [WARNING!] It's not been possible to align your subwoofer(s) with the front speakers despite all attempts! [WARNING!] Please check your subwoofer(s) for the cause of excessive delays. [WARNING!] Optimization will continue applying maximum possible delay to your sub(s) but the final calibration will not be optimal!
yes plug your subs directly
@@ocaudiophile Removed MiniDSP in the equation. Still saying Hz is outside limit. What can/should I do? 8:44:45 AM [INFORMATION] Required delay @98Hz is outside limits: -8ms 8:44:52 AM [INFORMATION] Crossover frequency: 60Hz, required delay: 20.01ms (subwoofer polarity inverted) , dip removal efficiency: 88.38% 8:44:54 AM [INFORMATION] Required delay @37Hz is outside limits: -1ms 8:45:04 AM [INFORMATION] Crossover frequency: 80Hz, required delay: 19.98ms (subwoofer polarity inverted) , dip removal efficiency: 88.90% 8:45:17 AM [INFORMATION] Required delay @250Hz is outside limits: -9ms 8:45:17 AM [INFORMATION] Crossover frequency: 90Hz, required delay: 20.01ms (subwoofer polarity inverted) , dip removal efficiency: 88.91% 8:45:17 AM [IMPORTANT!] Selected optimal set up: 8:45:17 AM [IMPORTANT!] Front speakers will be set to 'Small' and crossed over with the subwoofer(s) at 90Hz
It's just additionally showing you the failed attempts. Your sub is properly aligned with front speakers at 90Hz crossover. I have revised the wording now to avoid confusion.
After calibration is it ok to reconnect the DSP? I have a Dayton Audio DSP-LF. It is set to protect the woofer from going outside of its capable frequency range. Only settings that are applied are a HPF and LPF plus 2 PEQ settings for the short comings of the woofer to try and keep it at more of a flat response.
@jonathanhatter4276 If it's not introducing massive delays, you dan use it in the chain and measure Audyssey.
The Bass on MJ is the best so far. STARZ has this bass tone the use in their station ID and it never sounded better. Thank you!
There is no API tab on the latest REW version for Windows? do we just skip that part out then?
Use the download link given in the script. You need a Beta REW version.
@@ocaudiophile it’s a dead link?! A timeout occurred error code 524
@@eniocab It's not, AVNirvana servers are down today for some reason.
@@ocaudiophileoh ok makes sense will keep on trying… thank you…
hi do i have to measure subwoofer at 75 on audyssey app for best result or it doesnt matter and that i can set from 80-83db for calibration and let the program deal with it ?
Better in the green zone.
Can you use dynamic volume with the deq version or is it supposed to be used without
Yes you can.
@@ocaudiophile j'avais la même question mais avec master
@@TheBrianpaul I'ts useful in lower volumes with movies, not so much with music.
@@ocaudiophile en effet , en général je ne l'utilise pas pour la musique, mais du coup si je l'utilise pour les films avec la courbe master, vous me conseillerez d'utiliser quel niveau, Light, medium ou heavy ? Merci encore pour votre travail et votre disponibilité
@@TheBrianpaul I use it with "light" when I do.
What if my third sub does not have a polarity switch? Is phase the same thing? Set to 180? 2:10:36 PM [WARNING!] SW3: 5.88 meters, please SWITCH this subwoofer's POLARITY!
It's if it's a flip switch. If it's a dial with variable phase degrees, it's not a polaarity swicth adn may introduce extra delays unaccounted for by Evo. In this case, better run Evo with "no sub inversion" option.
@@ocaudiophile Yeah, I thought they were different. Thank you
Is the polarity switch same thing that signal invertion?
@@kockster1 It's what happens when you switch + and - of your speaker cable connection.
@@ocaudiophile my sub has signal invertion and and variable phase.
Hello sir, I'm most impressed and grateful for the content you're sharing. I've some questions (disclaimer: I'm a rookie so I may be very wrong). My priority is to flatten the low bass, because I have insane drop in 34-57 Hz range. 1. If I was to leverage all your latest methods for a 2.0 system with Roon (no audyssey), I suppose that would be combination of VBA + xover/box/port correction + the inversion below Schroeder. Is that right? 2. In what order should these filters be created and applied? My guess: 1) create VBA filter based on original measurement, 2) create xover/port filter based on VBA-applied trace, 3) create "inverted below Schroeder" filter based on xover/port-applied trace, 4) convolve inverted filter * xover/port filter, 5) convolve result of "4)" * vba filter 3. What REW measurement and analysis settings should be used for creation of each of these 3 filters? You specified one here kzread.info/dash/bejne/dZyE15KuY9HAqMY.html (with mic pointing at speakers and minimum phase cal file) and another one here kzread.info/dash/bejne/rKF906yYms_AgNo.html . I'm guessing the same measurement needs to be used for creation of all 3 filters, right? So which one? 4. What's the optimal measurement length for these corrections? Will 1M be good enough? 5. Does it make sense to aim for nearly flat (at zero degrees) result of maximum phase when correcting fox xover/box? Let's assume such correction won't ring or anything. Because I can make it much flatter compared to what you've shown, and even with quite small Q values. Or are the corrections you've shown sufficient? Should we only care about 100-1000 Hz range when "flattening" the max phase response (as it's the range that's audible phase-wise)? 6. I have quite pronounced phase differences between left and right speaker in my listening position. Should I rather them separately (rather than based on LR averaged)? Because my LR average would have quite high std. Deviation, so I would be correcting against a max phase trace which isn't very applicable to neither left nor right speaker.
Thanks for the gesture. 1M length is good enough, the louder and the longer the better but rew will slow down and inversions etc will be extremely large beyond that. VBA, phase correction, inversion order seems right, don't forget to generate minimum phase of the final vba and inversion filters. 100-1000hz is good for phase but remember to correct only excess phase. If certain correction causes pre echo, try to just fix what's different in excess phase of left and right speaker.
HI OCA! I am trying to match phase and time with a single channel measurement system such as USB microphone UMIK-2. Someone says UMIK-2 is not recommended for this alignment due to timing and phase variations and normalizations. REW should not be used without electrical loopback as timing reference or cal and timing reference for acoustical measurements to avoid timing manipulation by the program. how to ride it? thank you very much
If you tick " adjust clock with acoustic timing refenrrce " in preferences and measure with acoustic timing reference, you'll be fine with a USB mic.
Hi oca. evo mj says that the roll off of my sub is 250hz, but from the graph I can clearly see that the roll off starts from 120hz. what can I do to fix it? do I have to change the isreversepolarity value? thanks
You can untick the box isReversePolarity under that sub in the original ady file in a json editor. It has minimal effect on final sound though.
Hi there. I finally sat down to try this. Unfortunately the version of REW I’m using does not have any of the align features in the control panel?! I have V5.31.1 downloaded. What am I doing wrong? Cheers
Download rew Beta from avnirvana
@@ocaudiophile Many thanks for the response. I’ve downloaded v5.40Beta 49 and it’s not on that one either?
It's a menu that show up when you right click the mouse in "All SPL" tab.
@@ocaudiophileHello, thanks again for responding. I did finally manage to find a new updated version that has it. There’s so many versions! Ha Wish me luck. Thanks again
Is anyone having trouble with calibration doesn't matter how low I turn the subwoofer down I keep getting -12db have the latest app 1.110 I've tried it on the receiver and it's fine getting -8.5db . I've reset the amp and uninstalled and reinstalled the app tried on mobile and tablet all android receiver is x3600h
Just done a hard reset back to factory then asked me to update and same issue regardless of sub level app shows me - 12db but calibrated through the receiver is fine
@@MrMkhaliq This is a known issue with android for a long time now. Best is to find an APK for version 1.7.2 which works great. Or switch to ios!
@@sterlingstevens152 Thanks it worked 1.7.2 version
Is there a MAESTRO Target curve?
It's embeded inside the script!
@@rafacqit's downloaded when you run the script, make sure your browser allows multiple file downloads.
Any plans on supporting .mqx? (MultEQ-X)
Custom mic calibration files in MQX are encrypted and I couldn't break it no matter what I tried otherwise I could implement a MQX version of Evo in half a day.
@@ocaudiophile That sucks! But I just demoed a bunch of movies using your method and I applaud you sir! I've been using REW for a few years now and it would take a long time to do manually. Just wish I found this a day early and saved $200. I think MultEQ-X is worth it for sure but if it could combine with yours that would be a lot better. Sorry to hear they encrypt.
Thanks!
Welcome!
Got it figured out and getting ready to upload and sound test. Question is why are there 2 different files and which one should I try first? 20240810_1240_A1EvoMaestroMJmaster 20240810_1240_A1EvoMaestroMJdEQ0dB
Use master for movie watching, deq one is for low volumes and late night.
@@ocaudiophile Thank you sir!
@@m4nc1n1 Did you watch the whole video, he explains it in the video.
@@rafacq yes. Missed the curve part. I'm good