madVR - high quality video renderer (GPU assisted)

[huhn]

noise from speaker under load.

[Klaus1189]

That should be easy to determine, press mute on remote of AVR. If the whine sound is still there, it is coilwhine, right? Do you know what is causing this noise from speaker under load, I think there was something here in the past already, but I can't really remember.

[tp4tissue]

Coil whine unfortunately can be ALOT of things rolled into one.

It could be a coil/ capacitor/ chock/ resistor/ inductor, etc etc, anything that creates friction(resistance) for electricity can exhibit the piezoelectric effect.

Plugging in different components _TOGETHER_ often changes the situation of how the electricity drains through the device, so it can cause whine that wasn't there if those components were seperate.

This is primarily why OPTICAL is still the cleanest option for PC sound output as it's a form of galvanic isolation.

GPUs/CPUs are resistors, therefore, given the right circumstances, they screech as well.

[BetA13]

Thank you for all the informative Answers.

@tp4tissue

yes, i did recently change my Hardware.. (upgraded)


@Asmodian

madVR is more likely to cause coil whine. It is a very spiky load, once the queues are full the GPU renders one frame and then idles until it needs to render the next frame. At a 70% load with 24 fps video this means the GPU is using a lot of power for 29 ms then very little power for 13 ms, and repeat forever.

This!!! is exactly what i saw in my GPU stats(afterburner) Its only happening when teh GPU is running with Full Clock speeds, as soonest it clocks down the noise is gone. But its the Speed of the VRAM´s from what i could found out in my testings, GPU clocks do not matter so much in my Case. As soonest the VRAM clocks down, the noise is gone... So its the buffering of teh prerendered frames? Or something like that... Dont know if i sayd that right...

---

Also, i know what Coil WHine is and its coming form the GPU.. NOT the speakers.
Like i sayd, when downclocking the Card, the Coil whine is allmost gone and cant be heard under 40cm...

---

i know what you guys mean about the speakers. i checked them and they are all grounded and do not touch metal with metal, etc etc..
Its only when the GPU is used.. And Coil whine is still present when i unpluged my sound system completly. (also in Hardware Manager disabled)..

I have another GTX980 here, but i need an 6 to 8 pin adapter first before i can Test this Card also..
If it does not have coil whine im gonna keep the GTX980 instead of teh GTX970 STRIX (wich from looking on the Webz, coil whine is kinda common, teh whoel 9series from what i was reading).

@clsid

Maybe madshi could add an option to adjust the queue refill strategy. That could perhaps reduce these kind of side-effects. The queue doesn't strictly need to be nearly full all the time. With a queue of size 8, refill will now happen when it drops to 7. Instead you could wait until it drops to 6 or even 4.

That sounds interessting, is there a way i can test this here? Is that whats causing those "loads" on teh GPU?
I allways thought that the NGU scaler would be one thing that is causing it, and shure enough, when i tested it, NGU did make more noise then Jinc, superXBR did.. So i also settled for SuperXBR for the moment and do not quadruple anymore, since this also caused more noise..


---
But yes, in teh End it looks like thats just the way it is and how a coil/ capacitor/ chock/ resistor/ inductor, etc etc. work...
What i found out, at least for my GPU, is that lowering teh GPU RAM Speed did really help.. So i edited my GPU BIOS a bit, i do not need an OCed Card, so no Biggy for me..

Thanks for all teh Answers here, some good information.....

Best Regards

[wasper]

Hello,

My display (Sony) calibration was set do "disabled display calibration". When looking HDR content with MADVR the display (Auto detect settings) correctly switched to Bt.2020 and HDR.

But, I recently watched a video that is Bt.2020 non HDR. The Tv Color Space stayed at BT.709. I never noticed that my tv color space didn't switch automatically to the correct color space as 99% of my content is Bt.709. Is it normal that Madvr doesn't sent color space metadata unless HDR. Had to change my calibration to "diaplay is calibrated to BT.709". Doing so, MADVR translate the color space from BT.2020 to BT.709 loosing precious colors during the process but at least the display show accurate color.

Could switch the tv manually to BT.2020 but nobody wants to do that, right?

[Asmodian]

SDR does not have metadata, so there is nothing for madVR to send. You can keep your display in DCI-P3 and set madVR so it coverts BT.709.

[alexantr]

Who know anything about future of madvr? Will tonemapping be fixed in future? I can't uncheck "compromise on tone & gamut mapping accuracy" to activate two disabled options in "hdr" section. With unchecked "compromise on tone & gamut mapping accuracy" picture is reddish and unrealistic (I can not imagine who like it).

What I mean:
https://imgur.com/a/dMvYNJI
https://imgur.com/a/3gUvLj0

[wasper]

SDR does not have metadata, so there is nothing for madVR to send. You can keep your display in DCI-P3 and set madVR so it coverts BT.709.

Thank you. I suppose then that when watching tv sd content the tv will switch to smtpe according to resolution. Isn't important, just trying to figure out...

[Alexkral]

Who know anything about future of madvr? Will tonemapping be fixed in future? I can't uncheck "compromise on tone & gamut mapping accuracy" to activate two disabled options in "hdr" section. With unchecked "compromise on tone & gamut mapping accuracy" picture is reddish and unrealistic (I can not imagine who like it).

Yeah, that's the problem of using ICtCp the way it's done, but checking "Compromise in ..." causes other problems that are more evident. Actually I do think this can be fixed, in fact I've been using my own solution for tone mapping for some time now, if you could post the raw BT.2020 screenshot I'd like to check the result. EDIT: Forget it, it would be SDR.

And yes, I think most people would choose the second one.

[Alexkral]

Well, this is my result for the second:

https://drive.google.com/file/d/19ObPdihoTNNxouUn5o4I6xoda5BPrkkC/view?usp=sharing

[nevcairiel]

Who know anything about future of madvr? Will tonemapping be fixed in future? I can't uncheck "compromise on tone & gamut mapping accuracy" to activate two disabled options in "hdr" section. With unchecked "compromise on tone & gamut mapping accuracy" picture is reddish and unrealistic (I can not imagine who like it).


Tone Mapping has already been substantially reworked in the madVR beta versions with much better results, just need to be patient until its released - or use the betas like many here do if you watch a lot of HDR. But beware, it has many more options to find the proper balance, so its not necessarily fire-and-forget quite yet (hence still beta).

[alexantr]

Well, this is my result for the second:

https://drive.google.com/file/d/19ObPdihoTNNxouUn5o4I6xoda5BPrkkC/view?usp=sharing

It looks like my monitor in HDR mode shows.

[HillieSan]

Hi, where can I download the beta version?

[huhn]

it's in this thread sorry i don't know the page.

https://www.avsforum.com/forum/24-digital-hi-end-projectors-3-000-usd-msrp/2954506-improving-madvr-hdr-sdr-mapping-projector.html

[chros]

I can't uncheck "compromise on tone & gamut mapping accuracy" to activate two disabled options in "hdr" section. With unchecked "compromise on tone & gamut mapping accuracy" picture is reddish and unrealistic (I can not imagine who like it).

Yeah, that's the problem of using ICtCp the way it's done, but checking "Compromise in ..." causes other problems that are more evident. Actually I do think this can be fixed, in fact I've been using my own solution for tone mapping for some time now...
Interesting, is it publicly available?

There was a discussion about this recently in the beta thread started by @Javs, for about from here (https://www.avsforum.com/forum/24-digital-hi-end-projectors-3-000-usd-msrp/2954506-improving-madvr-hdr-sdr-mapping-projector-298.html#post59546710) (and it goes through 10 pages).

[Alexkral]

Interesting, is it publicly available?

Currently not, it's a pixel shader with BT.2390 tone mapping (original roll-off), saturation correction and gamut mapping. I'd like to share it at some point but I don't think it's completely finished, it needs some more work and testing, and right now I'm trying to finish another project completely unrelated.

There was a discussion about this recently in the beta thread started by @Javs, for about from here (https://www.avsforum.com/forum/24-digital-hi-end-projectors-3-000-usd-msrp/2954506-improving-madvr-hdr-sdr-mapping-projector-298.html#post59546710) (and it goes through 10 pages).

I took a look at that until madhi's answer, I'll try to summarize what I think. They are two different concepts. With "Compromise ..." Off, tone mapping and saturation correction are done in ICtCp in two separate steps, resulting in oversaturation and (theoretically) correct hue. With "Compromise ..." On, tone mapping is applied separately to the RGB channels, which directly desaturates them, but although for normal scenes this desaturation is more or less normal, for bright scenes it is clearly too much, to the point that highlights can end up completely white. And it also produces hue shifts, which, as incorrect as they may be, we are used to seeing because they are already present in the SDR.

So in terms of the saturation correction, it would be about finding a middle point, but there is no middle concept, so you have to start from one of the two. Since madhi is not willing to tolerate any hue shift and madVR is completely based on the first concept, I imagine he will try to modify the saturation correction step, and I wish him luck because I consider it extremely complicated. I think that the fact that desaturation is sometimes clearly exaggerated with the second concept, should not make us forget the fact that RGB channels are desaturated in a more natural way in the same tone mapping step, so it's just a matter of avoiding that excess. This can be done even while avoiding any hue shift with some conversions, but honestly, I am used to seeing the fire between yellow and red, also in real life, so maybe the shift is only wrong because we don't know enough about the changes in hue perception related to changes in intensity (see Bezold-Brucke effect), and perhaps the "very bad and un-scientific math" has surprisingly a correct side effect. So of course I understand madhi's point, but instead of adding options to artificially modify it, I think it would be better to allow it naturally up to a limit. But maybe we should ask a firefighter. :D

[el Filou]

SDR does not have metadata, so there is nothing for madVR to send. You can keep your display in DCI-P3 and set madVR so it coverts BT.709.IMHO that's a display bug/inconsistency. Even if there's no metadata, when receiving UHD the display should switch to BT.2020 colour space as it does with 601/709 when receiving SD/HD. @wasper Are you sure the display colour gamut mode is on 'auto'?

[huhn]

there is even in practice meta data for the color space and you can even set it with nvidia cards to bt 2020.

[tp4tissue]

IMHO that's a display bug/inconsistency. Even if there's no metadata, when receiving UHD the display should switch to BT.2020 colour space as it does with 601/709 when receiving SD/HD. @wasper Are you sure the display colour gamut mode is on 'auto'?


Headscratch.. why would it do this automatically for 4k. What if someone wants 4K SDR gamut emulation like on PC.

[jkauff]

Headscratch.. why would it do this automatically for 4k. What if someone wants 4K SDR gamut emulation like on PC.
Some of us have 4K monitors on our PCs.

[huhn]

what has this to do with a monitor or TV?

[shaolin95]

Hello guys...two questions..

1. If I am using the madvr Tone Mapping, does it mean when doing a 3Dlut with DisplayCal I must select 2.2 Gamma or can I use 2.4? I ask because of a comment I read recently someone saying he was forced to use 2.2 gamma because he uses the tone mapping feature of madvr.
2. Any suggestions on settings when upconverting 1080p blurays to 4K? I am on beta 112.

Like maybe this
Medium:

Chroma: NGU Anti-Alias (low)

Downscaling: SSIM 1D 100% + LL + AR
Image upscaling: Off
Image doubling: NGU Sharp
<-- Luma doubling: high
<-- Luma quadrupling: let madVR decide (direct quadruple - NGU Sharp (high))
<-- Chroma: let madVR decide (Bicubic60 + AR)
<-- Doubling: let madVR decide (scaling factor 1.2x (or bigger))
<-- Quadrupling: let madVR decide (scaling factor 2.4x (or bigger))
<-- Upscaling algo: let madVR decide (Bicubic60 + AR)
<-- Downscaling algo: let madVR decide (Bicubic150 + LL + AR)
Upscaling refinement: Off
Artifact removal - Debanding: low/medium
Artifact removal - Deringing: Off
Artifact removal - Deblocking: Off
Artifact removal - Denoising: Off
Image enhancements: Off
Dithering: Error Diffusion 2

High:

Chroma: NGU Anti-Alias (medium)

Downscaling: SSIM 1D 100% + LL + AR
Image upscaling: Off
Image doubling: NGU Sharp
<-- Luma doubling: very high
<-- Luma quadrupling: let madVR decide (direct quadruple - NGU Sharp (very high))
<-- Chroma: let madVR decide (NGU medium)
<-- Doubling: let madVR decide (scaling factor 1.2x (or bigger))
<-- Quadrupling: let madVR decide (scaling factor 2.4x (or bigger))
<-- Upscaling algo: let madVR decide (Jinc + AR)
<-- Downscaling algo: let madVR decide (SSIM 1D 100% + LL + AR)
Upscaling refinement: Off
Artifact removal - Debanding: low/medium
Artifact removal - Deringing: Off
Artifact removal - Deblocking: Off
Artifact removal - Denoising: Off
Image enhancements: Off
Dithering: Error Diffusion 2

Thank you!!

[Manni]

Re 3D LUT yes the target has to be 2.2 when using tonemapping. It doesn’t make any difference as PQ is absolute, so it will look the same as if 2.4 was possible. It can be whatever you want for sdr rec-709.

[shaolin95]

Re 3D LUT yes the target has to be 2.2 when using tonemapping. It doesn’t make any difference as PQ is absolute, so it will look the same as if 2.4 was possible. It can be whatever you want for sdr rec-709.
I just tried a 2.4 3Dlut with my projector as 2.4 and things were a bit too oddly dark so I guess 2.2 it is.

Ok but since you mentioned SDR, from my understanding, since i have my projector to 2020 and madvr with the 3Dlut on the 2020 slot of the calibration page, then madvr will be taking care of mapping any SDR non 2020 content to 2020 space so I only need that one 3Dlut. Right?
Thanks again

[huhn]

yes this one is enough.

but you could just add a bt 709 gamma 2.4 3D LUT for SDR as an example and you don't need new readings for this.

[HillieSan]

it's in this thread sorry i don't know the page.

https://www.avsforum.com/forum/24-digital-hi-end-projectors-3-000-usd-msrp/2954506-improving-madvr-hdr-sdr-mapping-projector.html

Thanks. I have found it. Phew, lots of stuff to read.

[tp4tissue]

Hello guys...two questions..

1. If I am using the madvr Tone Mapping, does it mean when doing a 3Dlut with DisplayCal I must select 2.2 Gamma or can I use 2.4? I ask because of a comment I read recently someone saying he was forced to use 2.2 gamma because he uses the tone mapping feature of madvr.
2. Any suggestions on settings when upconverting 1080p blurays to 4K? I am on beta 112.


You craete a 2.4 lut for SDR
For the HDR, you create a 2.2 SDR Lut

In both cases, you want to use the Native gamut mode of your TV, whichever mode gives you the widest gamut.

[magnusr]

HDR Question. Just upgraded to a LG C9 Oled. In madvr under hdr should I just use passthough (with hdr metadata) and have dynamic tone mapping enabled on the tv? Or should I set the target peak nits to 700 in madvr and disable dynamic tone mapping on the tv?

[Manni]

I just tried a 2.4 3Dlut with my projector as 2.4 and things were a bit too oddly dark so I guess 2.2 it is.

Ok but since you mentioned SDR, from my understanding, since i have my projector to 2020 and madvr with the 3Dlut on the 2020 slot of the calibration page, then madvr will be taking care of mapping any SDR non 2020 content to 2020 space so I only need that one 3Dlut. Right?
Thanks again

Yes sure if it's a panel and if you don't need a separate LUT for SDR to get better contrast/black levels/lower peak white in a dedicated room, a single BT2020 LUT should do and madVR can convert as needed.

2.2 is the only possible choice for the target if you want to use the LUT for madVR tonemapping, but you can set the display to whatever you want, as it will be corrected by the LUT. It just makes sense to make the baseline calibration as close to the target as possible if you don't need to use the same calibration fro non-madVR sources.

[Asmodian]

HDR Question. Just upgraded to a LG C9 Oled. In madvr under hdr should I just use passthough (with hdr metadata) and have dynamic tone mapping enabled on the tv? Or should I set the target peak nits to 700 in madvr and disable dynamic tone mapping on the tv?

I use passthrough on my C9 but others prefer madVR's tone mapping.

[magnusr]

I use passthrough on my C9 but others prefer madVR's tone mapping.

Thanks. Ill stick with passthrough then :)

[magnusr]

Also got a questions about chroma and image upscaling. 1080p>2160p. While keeping the picture as the filmmaker intended (more like film maker mode). Using 1050Ti with 3600x ryzen cpu to my LG C9 oled tv.

Chroma upscaling: NGU Anti--Alias, medium quality
Image upscaling: NGH Sharp High

Is this good or a bad setting?

[VBB]

If your 1050Ti can handle "High" for luma, sure. I also use AA for chroma, but on "low" with my 960. The general rule here is luma > chroma. Asmodian didn't mention it, but you probably want to turn off Dynamic Tone Mapping on your C9. It messes with the picture too much. There's also a dedicated OLED thread here, if you have more questions.

[sam0t]

Hello fellow MadVRs, tl;dr warning!

Been experiencing almost daily BSOD’s with with MPC-HC + MadVR 0.9.17 for the past +2 months or so, and thought it prudent to share the solution for this particularly tricky issue. First of all must say that my AMD Ryzen setup has been rock stable with MadVR ever since I put it together back in 2017 and later upgraded the CPU from Ryzen 5 1600x >> 3600 in Sep 2019.

So when I started getting these BSODs back in April I thought that they surely it must be due to some usual suspects such as old driver/BIOS, overheating, faulty memory, a buggy Windows 10 update
or faulty hardware, but the system kept on passing all of the hardware stress tests I kept throwing at it (CPU/MEM/GFX), and it was stable through few hours of 3D gaming easily too, but as soon as video playback began there would be a random BSOD within 15-45 minutes sure as day.

What made this issue so much harder to pinpoint was the fact that the BSODs error codes kept changing constantly, with the following ones however being most numerous: DRIVER_OVERRAN_STACK_BUFFER, IRQL_NOT_LESS_OR_EQUAL, PAGE_FAULT_IN_NONPAGED_AREA. And then there was the fact that the BSODs were always pointing to the ntoskrnl.exe, and not any driver which might have given clue to the origin of the issue.

After some 60 BSODs and countless hours of fruitless troubleshooting later I stumbled upon a forum thread about some Windows 10 update removing AMD's Power Plan from Windows, and surely that was the case with my OS as well. The tricky part was that for some reason the AMD Power Plan would not appear in Windows when installing the latest AMD chipset drivers (a common issue according to various forums) and to get it to show, had to extract and install the RyzenPPM.msi file manually from an older older Chipset driver package from Gigabyte for Windows 10 1903. After installing the old AMD Power Plan there has been no BSODs for 7 days now, so I think it is safe to say this was the root cause for these issues. I can only speculate as to why these issues started couple months back (Probably it was some of the more recent Windows 10 updates that did away the AMD power profile from my OS, or it changed the Windows default Power Profiles in some way), but my working theory is that perhaps the latest Windows Default Balanced Power Plan does not work well with my older X370 motherboard chipset and the newer AMD Ryzen 3600 CPU combo.

Long rant, but perhaps this helps somebody else struggling with similar issues.

edit:

In case anybody stumbles across this post, my issue was "officially"resolved by AMD chipset drivers 2.04.28.626 which finally installed successfully AMD power plan 5.0.0.0 for my Windows, and also by starting to use the AMD Ryzen Power Profile "High Performance" as default power plan instead of the Balanced.

Can't say for sure, but my hunch is that the Balanced power profile's constant adjustment of the CPU clock speed somehow causes the BSODs with hardware accelerated video playback with my system.

[Asmodian]

If your 1050Ti can handle "High" for luma, sure. I also use AA for chroma, but on "low" with my 960. The general rule here is luma > chroma. Asmodian didn't mention it, but you probably want to turn off Dynamic Tone Mapping on your C9. It messes with the picture too much. There's also a dedicated OLED thread here, if you have more questions.

Thanks, I do have that off.

[magnusr]

Thanks, I do have that off.

Thanks. But what happens to everything above around 700 nits if dynamic tone mapping is off and madvr is sett to passthrough?

[VBB]

You're confusing LG's dynamic tone mapping with normal tone mapping, which cannot be disabled (unfortunately). The TV will never clip, even with DTM turned off.

[magnusr]

You're confusing LG's dynamic tone mapping with normal tone mapping, which cannot be disabled (unfortunately). The TV will never clip, even with DTM turned off.

Ok thx :) madvr with passthrough and disable dtm on the c9 then.

[chros]

You're confusing LG's dynamic tone mapping with normal tone mapping, which cannot be disabled (unfortunately). The TV will never clip, even with DTM turned off.
C9 and newer models can be set to clip, but there is always tonemapping with HDR10 mode.

[VBB]

You mean in game mode by turning on HGIG and/or by calibrating the LUT a certain way?

I didn't want to get into anything too complicated here ;)

[TripleH]

Hi All,

I'm building a new HTPC to run madVR and I am trying to understand which GPU I should go with.

My goals are:
- Upscaling 1080p to 2160p
- Dynamic tone mapping
- Other image enhancements on 2160p content
- 3D Lut calibration

I planned to use a GTX 1080 (non Ti) for this task.

Will I get any benefit for the above tasks if I go with RTX 2080 Ti instead?

Thanks in advance,

[chros]

If you can use d3d11 native in Lav then 1080 will be more than enough, maybe a 1070 as well. There will be really powerful new GPUs next year, so there's no point spending lot of money on it now.

[huhn]

the new GPUs will pretty sure release all this year including AMD and nvidia maybe even bad intel GPUs.

it very likely that madVR will make use of tensor cores getting a pascal GPU is not a great idea.

[RXP]

Is there a reason people don't use CUDA in LAV? I seem to get the best performance out of that for tone mapping.

[curael]

Just checking in to say that I'm now on Windows 10 Pro build 2004 and on the newest nvidia driver as of today - on an RTX 2080 and everything is working as it should. Woowee. In case anyone is considering making the plundge. :p HDR switching still works as it should and there are no stutters as were the case in previous versions of Windows 10 on newer nvidia cards. Don't know when they fixed it but I just wanted to mention that it at least works great now. :)

[Mike-uk]

hmm ok madvr is causing mpc-be to close upon a file being played, using another render solves the problem, so ive used the uninstall.bat with admin rights, got a fresh copy of madvr install, but i still have all the old config ?? remder profiles and resolutions ?? where is it storing this info ?? Thanks Mike

[el Filou]

Is there a reason people don't use CUDA in LAV? I seem to get the best performance out of that for tone mapping.This is surprising, CUVID being copy-back you would not expect it to have better performance than D3D11 native.
Do you mean better performance compared to DXVA copyback?
Also I seem to remember nevcairiel saying something about CUVID clipping to 8-bit on decode and therefore being unfit for HDR, not sure if it's still the case.hmm ok madvr is causing mpc-be to close upon a file being played, using another render solves the problem, so ive used the uninstall.bat with admin rights, got a fresh copy of madvr install, but i still have all the old config ?? remder profiles and resolutions ?? where is it storing this info ?? Thanks MikeIf you install in a folder with no write access like Program Files under a normal user then it stores settings in the registry.

[sam0t]

Just checking in to say that I'm now on Windows 10 Pro build 2004 and on the newest nvidia driver as of today - on an RTX 2080 and everything is working as it should. Woowee. In case anyone is considering making the plundge. :p HDR switching still works as it should and there are no stutters as were the case in previous versions of Windows 10 on newer nvidia cards. Don't know when they fixed it but I just wanted to mention that it at least works great now. :)

Encouraging to hear. Earlier this year had W10 updates wreak havoc with my HTPC where an undetermined Windows update silently removed AMD Ryzen Power Profile from the system, which in turn introduced random BSODs with GPU assisted video playback. Just had W10 install the 2004 update with the HTPC that brought up bad memories. :D


hmm ok madvr is causing mpc-be to close upon a file being played, using another render solves the problem, so ive used the uninstall.bat with admin rights, got a fresh copy of madvr install, but i still have all the old config ?? remder profiles and resolutions ?? where is it storing this info ?? Thanks Mike

For me they are stored in the registry @ HKEY_CURRENT_USER\SOFTWARE\madshi\

Read somewhere that the settings.bin file at MadVR install folder would contain MadVR settings as well, but as el Filou suggested, this must be the case when MadVR is installed on a folder with write access.

[shaolin95]

Hi All,

I'm building a new HTPC to run madVR and I am trying to understand which GPU I should go with.

My goals are:
- Upscaling 1080p to 2160p
- Dynamic tone mapping
- Other image enhancements on 2160p content
- 3D Lut calibration

I planned to use a GTX 1080 (non Ti) for this task.

Will I get any benefit for the above tasks if I go with RTX 2080 Ti instead?

I am doing all that with my 1070 ..well except the 2160 enhancements so not sure what you are doing on that one.
No issues for me.

Thanks in advance,
I am doing all that with my 1070 ..well except the 2160 enhancements so not sure what you are doing on that one.
No issues for me.

[Mike-uk]

Thanks el Filou and sam0t, after deleting the reg entry madvr is working again with mpc-be