Sound is broken after upgrading to macOS 12.4

Thanks to the community, I created my build based on OpenCore starting from Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina and upgraded to Big Sur and then Monterey. It works fine generally.

I upgraded to the latest macOS 12.4 recently. Everything (except sound) works as before. Today when I tried the speakers I found the sound is not playing (I mute them most of the time). I booted to Windows and confirmed the speakers are functioning. It worked well in macOS 12.3 before. After some try it turned out:

• no sound when the volume bar is turned to the middle or lower
• low sound with high background noise when the volume is turned to the maximum

I also upgraded the OpenCore from 0.7.7 to 0.8.0. So I tried to revert to the previous 0.7.7 snapshot of the EFI folder. The problem was not resolved. So it seems this is not related to the OpenCore upgrade.

I'm using Gigabyte Z170X UD3 motherboard with ALC1150. I added AudioDxe.efi driver and AppleALC.kext in my EFI.

The following is the audio related settings, which worked before in 12.3. I checked my OpenCore log and found the AudioCodec should be correct:

08:011 00:011 OCAU: Matching PciRoot(0x0)/Pci(0x1F,0x3)/VenMsg(<redacted>,00000000)...
08:026 00:014 OCAU: 1/2 PciRoot(0x0)/Pci(0x1,0x0)/Pci(0x0,0x1)/VenMsg(<redacted>,00000000) (5 outputs) - Success
08:042 00:016 OCAU: 2/2 PciRoot(0x0)/Pci(0x1F,0x3)/VenMsg(<redacted>,00000000) (9 outputs) - Success

Layout ID

Audio Related Settings

What should I further check / update?

Thanks in advance!