Magic = Audyssey One by OCA (Obsessive Compulsive Audiophile) + REW John Mulcahy's free and amazing Room EQ Wizard (REW)

Gerry Iaria

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Hello,

Serkan (OCA) managed to make it even more convenient:


(would be a dream to have this kind of REW api script independent from Audyssey for the generic DSP users)
I'm sure he's very good at his job, but the upgrades keeps on coming every day, I did the version 2.2, it all sounding good, but only after setting cross-over in the mini Dsp, had a huge null at 110hz that couldn't get rid of it, my mains were crossed at 150hz, happy for now after tweaking, not sure if I'll go for 2.3
 

Gerry Iaria

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I think after al, he's doing a fantastic job, and for free, how much better can he go? Could this rival Dirac??
 

ManCaveAudio

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I think after al, he's doing a fantastic job, and for free, how much better can he go? Could this rival Dirac??
Time will let us know. But the flexibility (which Dirac doesn't provide) with exceptional sound he is providing is rewarding and I feel it is just a start......I don't have Dirac, so hard to say. Someone have Dirac can compare A vs B.
 

ManCaveAudio

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I'm sure he's very good at his job, but the upgrades keeps on coming every day, I did the version 2.2, it all sounding good, but only after setting cross-over in the mini Dsp, had a huge null at 110hz that couldn't get rid of it, my mains were crossed at 150hz, happy for now after tweaking, not sure if I'll go for 2.3
With 2.3 and 2.3x he has introduced custom crossover selection as we as user have predefined crossover in our mind and comfortable to set. He is trying to give best out of best on users requirement and errors reporting.

This the way, how any software built.
 

Jose Sifontes

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I tried it today and the results are fantastic. Best calibration in a long time for me. Sounds as good or better than Dirac Live to my ears.
 

Gerry Iaria

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I tried it today and the results are fantastic. Best calibration in a long time for me. Sounds as good or better than Dirac Live to my ears.
Did you try the new v3.0? there are quite a few on a facebook group that think it's the best, but also quite a few more that are not happy with the result, I am on mixed mind, have the v3.0 beta, it sounds good, but only after adjusting crossovers and boosting the sub by 5db, unless you just leave it as it is without modifying, who knows?
 

ManCaveAudio

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Did you try the new v3.0? there are quite a few on a facebook group that think it's the best, but also quite a few more that are not happy with the result, I am on mixed mind, have the v3.0 beta, it sounds good, but only after adjusting crossovers and boosting the sub by 5db, unless you just leave it as it is without modifying, who knows?
With V3 beta, you can force script to optimise at your desired Xo and you can also play with REW EQ filters (Maxboost, Overall Max Boost and Allowlowshelf Filter).

Did you compare it with Dirac?
 

Gerry Iaria

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With V3 beta, you can force script to optimise at your desired Xo and you can also play with REW EQ filters (Maxboost, Overall Max Boost and Allowlowshelf Filter).

Did you compare it with Dirac?
I don't have Dirac, but how do you change the script?
 

Gerry Iaria

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Please change the file extension from .html to .txt and make changes as required and post changes in the script, replace .txt to .html
thank you, will have a look :T
 

darklight

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Yesterday I came to know the new manual A1 calibration method in AVSForum. I did it try and going to explain this experiment in five stages: Steps, Results, Challenges, Advantages, and Disadvantages.

1) Steps I followed:
As said by @ImageMaximum I set my AVR into pure mode. Audyssey Off, DEQ & DV off, Distances are set to Zero, Speaker levels set to Zero and speakers set as large (Full Range). I have 5.1 set-up as my secondary HT (where I leave on rent for my job. I have plenty of time to play around in the absence of family :greengrin:;)). (AVR is Denon X4700H, going to install Marantz Cinema 70s which is in transit and X4700H will move to the main bedroom theatre at home in 5.1.4 set-up)

I took 8 measurements for each position (full range 0 to 20000) with 1M sweep. Save that file as .mdat. Export all measurements impulse as text (please untick Normalise sample to peak value). Remove all frequency responses from REW and import the impulse response you exported. Change the name of all measurements (C0,C1, FL0,FL1, etc.). Go to All SPL, select all, right-click the on first measurement, Click on Change Selection Cal, and Import your Calibration Mic Cal File in Mic/Meter Calibration. You can align SPL of all measurements to avoid any SPL offset while optimization.

The next step is to open A1 in editor mode and change the Max Gain Value from 0 to 3,6,8 as per your like (I use 8 because this helps me to measure my sub flat down to 31HZ, without that it measured flat down to 45HZ), Change the upper limit to 20000 from 200 by default, replace the offset value -42 to 0 and save A1 file. (These are the modifications I made before running optimization which are not necessary to do if you do not want to alter OCA's settings. This was an experiment for me to learn the best possibilities to get better sound with the help of A1)

Now run your A1 as normal. Import your .ady file, but ignore the exported zip file extracted from A1 (please ensure your impulse responses are there in REW and all basic settings are done for A1 as suggested by OCA). Click optimization.
Your new .ady file is ready to upload. Enjoy your new sound.

2)Results:
The results are quite surprising. Frequencies are much flatter than the native A1 process done with .ady file. Got a much flatter response and sounds better than the native A1.

Post A1 optimisation I only EQed my Elac 3010 Sub with inbuilt 8-band PEQ. Thanks to Elac for 8-band PEQ

Below is the final results (LFE, FL, FR & C speakers) post optimization. You can see a big peak or bump between 1 and 2 khz which is never there. Can anyone help to understand the reason behind it?

The main .mdat file is attached herewith (https://drive.google.com/file/d/1SrfMz4Zl4yQCFOHrf-5CvdoeJEkzzR0Q/view?usp=drivesdk) for review and help on this bump observed in FL & C speaker between 1 to 2 khz. It would be great if someone could help with this.

My FL & FR (Wharfedale Dimond 212) speakers are not measured well from 1KHZ (specifically FL). you can see in the below graph. A1 never recovered or made it flat (But Aydyssey calibration from the Mobile Editor App. Aydyssey MultEQ-X or Calibration through AVR can recover it/make it flat). I am going to replace it with a Dynavoice DM6 bookshelf speaker (used one).

Measurements are separated for better illustrations.
View attachment 70896
Same calibrations without separation:
View attachment 70897

3) Challenges:
  • This process takes more time than basic A1 optimisation (but finds to be worth it).
  • I forgot to untick the Normalise sample to peak value while exporting the impulse responses which was giving me very odd optimisation results. Two times ran optimisation then I realised the mistake I made.
  • Unexpected bump is observed in my FL & C speaker between 1 to 2 KHZ which was not there.

Other than this, no other challenges I faced.

4) Advantages:
  • The main advantage of this method is you have full control over your measurements. At any point in time, you can add a new position, replace any measurement with an old one, remove a position, Increase measurement numbers or decrease it, if you replace speakers, you just need to replace the old speaker's measurements with a newer one.
  • You can get high-resolution measurements like 1M, 2M, 3M etc....
  • You can do SPL alignment before optimisation
  • Can compare before and after results
  • A calibrated microphone can be used for measurements
  • No need to worry about Audyssey Mobile Editor App Version. (read many discussions around this in this and other traces whether it is 1.7.2 or newer version. I do not think it is important with this method. Please make me correct on this as I could not understand the error people talking about).

5) Disadvantages: For me, I must EQ my sub post optimisation (even after Audyssey of A1 calibration) other than this I haven't seen any disadvantages in comparison to the native A1 optimisation process.

Inputs/suggestions on this are welcome to correct any mistake I made in this process.

This was a warm-up for me before the new AVR and Speakers going to be installed.

This is quite long but I hope this will help others to experiment with their system.....
I need to ask a question about this method. When doing the measurements with the umik 1 wont Audyssey be expecting measurments from a ACM1 mic instead and would this not cause a conflict? Or does the A1 script take care of that conversion?
 

ManCaveAudio

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I need to ask a question about this method. When doing the measurements with the umik 1 wont Audyssey be expecting measurments from a ACM1 mic instead and would this not cause a conflict? Or does the A1 script take care of that conversion?
No, Audyssey doesn't care and in my experience A1 also. Because we are converting REW measurements to Impulses response and optimize them.

Hope you are using A1 Evo 3, newer and much improved version of A1.
 

darklight

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No, Audyssey doesn't care and in my experience A1 also. Because we are converting REW measurements to Impulses response and optimize them.

Hope you are using A1 Evo 3, newer and much improved version of A1.
Ok thanks for the reply that makes sense.
 

Gerry Iaria

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I saw a post yesterday on FB, that OCA posted, about a new version of Evo, V3X not sure when he'll bring it out, another version to check out :)
 

ManCaveAudio

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I saw a post yesterday on FB, that OCA posted, about a new version of Evo, V3X not sure when he'll bring it out, another version to check out :)
He is waiting for REW Beta 43. Expecting that REW Beta 43 will release on Saturday, so launch of Evo3x is expected tomorrow.

Evo 3x change log is uploaded by OCA on his channel. Which is very exited.
 

Gerry Iaria

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He is waiting for REW Beta 43. Expecting that REW Beta 43 will release on Saturday, so launch of Evo3x is expected tomorrow.

Evo 3x change log is uploaded by OCA on his channel. Which is very exited.
yes, I saw the change log, it looks good at least on paper, but I wonder, every new version that has been released so far, people say it's the best, would that be a Placebo effect?? at least on my system it was never the best, just ok, but will try the new version:T. But i know that everyone has a different system, different speakers, rooms, furnishing, etc etc. so what's good for one can't be good for the other, I'll stop now :laugh:
 

ManCaveAudio

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I c
yes, I saw the change log, it looks good at least on paper, but I wonder, every new version that has been released so far, people say it's the best, would that be a Placebo effect?? at least on my system it was never the best, just ok, but will try the new version:T. But i know that everyone has a different system, different speakers, rooms, furnishing, etc etc. so what's good for one can't be good for the other, I'll stop now :laugh:
Agree, but I can feel vast difference between default Audyssey vs A1.

And now my both presets are loaded with A1 Evo. Thanks.
 

darklight

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yes, I saw the change log, it looks good at least on paper, but I wonder, every new version that has been released so far, people say it's the best, would that be a Placebo effect?? at least on my system it was never the best, just ok, but will try the new version:T. But i know that everyone has a different system, different speakers, rooms, furnishing, etc etc. so what's good for one can't be good for the other, I'll stop now :laugh:
I agree with you. We are in the minority in not hearing a big advantage of A1. I always go back to Default Audyssey after trying every version of A1. But in my case I think it has do with my room being all concrete walls and creating a really bad acoustic environment.
 
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Gerry Iaria

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I agree with you. We are in minority in not hearing a big advantage A1. I always go back to Default Audyssey after trying every version of A1. But in my case I think it has do with my room with all concrete walls creating a really bad acoustic environment.
glad you agree, i thought there might be something wrong with my system and my hearing, I've settled now for the v3.0 beta, but had to adjust the crossover and distance and boost the sub, sounds ok for now, until the next one :T :)
 

Gerry Iaria

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Strange thing happened, loaded the latest Evo3X, went to check the levels with REW, but I get no sound coming in, used it 2 days ago, and all was fine, no settings have been changed that I know, restarted my Mac, Minidsp, and rew, and amp, but still the same, so couldn't get a calibration, but watching tv, it all seems fine, the subs are working :dontknow:
 

ManCaveAudio

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Strange thing happened, loaded the latest Evo3X, went to check the levels with REW, but I get no sound coming in, used it 2 days ago, and all was fine, no settings have been changed that I know, restarted my Mac, Minidsp, and rew, and amp, but still the same, so couldn't get a calibration, but watching tv, it all seems fine, the subs are working :dontknow:
Didn't give it try till now. Optimisation is ready to load but out of station till tomorrow night.
But no one reported such error in AVSforum till now. It is strange 🤔
 

Gerry Iaria

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Didn't give it try till now. Optimisation is ready to load but out of station till tomorrow night.
But no one reported such error in AVSforum till now. It is strange 🤔
I know, it seems very strange, I will try again tomorrow, maybe uninstalling REW, and start afresh :T
 

Gerry Iaria

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Didn't give it try till now. Optimisation is ready to load but out of station till tomorrow night.
But no one reported such error in AVSforum till now. It is strange 🤔
Ok, connected the laptop to the amp fired up REW and all is working fine, no settings were changed, it's a mistery why it wouldn't work yesterday, :)
 
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