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GUIDE: HDMI Audio

cdf said:
My understanding is that Lilu is required for AppleALC. In my case, even with Lilu, HDMIAudio would not work, so I just used the previous version of AppleHDA (see post 646).
Click to expand...

So, all you did is just

1) Replace the 10.13.4 AppleHDA.kext by the 10.13.3 version
2) Install AppleALC.kext 1.2.6 to S/L/E
3) Installed HDMIAudio.kext 1.1

on your Mac Pro. Is that correct?
 
Should have access to a clean 5,1 that never messed with HDMI audio later this week. If there's anything quick/easy that would be beneficial or helpful to test, post some instructions and will attempt to try for you.
 
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h9826790 said:
So, all you did is just

1) Replace the 10.13.4 AppleHDA.kext by the 10.13.3 version
2) Install AppleALC.kext 1.2.6 to S/L/E
3) Installed HDMIAudio.kext 1.1

on your Mac Pro. Is that correct?
Click to expand...

No need for step 2 in this case. I did steps 1 and 3, and my audio was back.

An alternative (which keeps AppleHDA.kext untouched) is to install AppleALC.kext, Lilu.kext, and HDMIAudio.kext. This option, however, did not work on my cMP (maybe it only works for hackintoshes).
 
cdf said:
No need for step 2 in this case. I did steps 1 and 3, and my audio was back.

An alternative (which keeps AppleHDA.kext untouched) is to install AppleALC.kext, Lilu.kext, and HDMIAudio.kext. This option, however, did not work on my cMP (maybe it only works for hackintoshes).
Click to expand...

I see. Thanks for the clarification.

I tired both, in my case, both won't work with my 1080Ti.
 
Use latest lilu.kext and AppleALC.kext by installing it in System/Library/Extensions. Use kexts installer like kextbeast which is available on site tonymacx86

Now I don’t know which are the latest versions but the ones I downloaded from reddit.com/r/hackintosh section worked. Found it. Link here

No need for HDMIAudio.kext. It has reached it’s end of life.

But if you use AppleHDA.kext from 10.13.3 then you can use HDMIAudio.kext but for how long will you depend on 10.13.3 kext?
 
Last edited:
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d5aqoëp said:
Use latest lilu.kext and AppleALC.kext by installing it in System/Library/Extensions.
Click to expand...

This is a great solution (if I can get it to work). Could you confirm that you are on a cMP with an Nvidia graphics card? Are you also using NvidiaGraphicsFixup.kext?
 
d5aqoëp said:
Use latest lilu.kext and AppleALC.kext by installing it in System/Library/Extensions
Click to expand...
Note: The 10.13.4 AppleHDAController binary fix in AppleALC.kext supports one Nvida HDMI codec device_id, 0x0fbb. Any other device id requires an edit to the patch. Once edited, recompile AppleALC and install the new AppleALC.kext. Credit: FredWst
Screen Shot 2018-04-10 at 3.36.08 PM.png
 
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Both kexts were loaded and reported as loaded in Extensions. But no sound via HDMI, GTX 980...

There are some boot arguments as far as I understand from the developers page for both kexts, for example:
  • “-alcbeta - to enable AppleALC on unsupported systems (usually unreleased or old ones)” ...Could this help?
 
@h9826790
No HDAU, did you remove HDMIAudio.kext? If yes, restore.
Use Xcode/IORegistryExplorer
Reply with a copy of IOReg.
 
Stupid question: Sound over USB-C card is possible only for devices with Thunderbolt? There is no way to output sound via USB-C PCI-E card on cMP, right?
 
Susurs said:
Stupid question: Sound over USB-C card is possible only for devices with Thunderbolt? There is no way to output sound via USB-C PCI-E card on cMP, right?
Click to expand...

With a USB-C DisplayPort alternate card like the Sunix UPD2018 it should be possible. But since that card needs to be connected to the display port of the graphics card, it would still require HDMI (or DP) audio.
 
bsbeamer said:
Assume you mean USB-C directly, not when using a USB-C audio interface, correct?
Click to expand...

I ment, for example, using USB-C to HDMI cable with my Sonnet Alegro USB-C card in cMP. Was just wondering what would happen if I attach it to a spare HDMI port on a TV or some audio receiver - could I get sound output? :rolleyes:
 
cdf said:
I'm interested in seeing the AppleALC approach work.

@h9826790 perhaps you could try the version of IORegistryExplorer provided at https://github.com/toleda/audio_ALCInjection and zip the exported file. In my case, the file was less than 1 MB.
Click to expand...

toleda said:
Compress the file, attach .zip
Click to expand...

Thanks both!

I didn't realise there is an IORegistryExplorer 2.1 on github, which export a much smaller file then the current IORegistryExplorer 3.0.2.

Anyway, here is the ioreg. Million thanks in advance!
 

Attachments

  • Mac Pro.ioreg.zip
    1.1 MB · Views: 345
h9826790 said:
here is the ioreg.
Click to expand...
The process that enabled all Nvidia HDMI audio codecs has been disabled in 10.13.4 AppleHDAController.kext.
IOReg show the Nvidia HDMI codec is not recognized, no AppleHDAController.
Screen Shot 2018-04-16 at 5.24.40 PM.png
1080 Ti/HDMI audio codec id is 10ef.
The simplest fix to patch the binary (hex editor):

Binary: AppleHDAController
Find: de 10 1a 0e
Replace: de 10 ef 10 (1x)

AppleALC.kext_v1.2.6 does not support 10ef, the next release will.
Attached is a preview of the next version supporting 10ef

Install either method and reply with new IOReg.
 
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