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As some of you early adopters of 9 Series motherboards may know, onboard audio is not functioning as it did on 5-8 Series motherboards. The reason for this is that Intel has changed the codec device id from 0x80868C20 to 0x8086A020.
To get audio to work on 9 Series, you must binary patch 4 instances of 20 8C to A0 8C in the AppleHDAController binary. I've attached 3 pre-patched versions for testing.
We're going to make a patch available in the next MultiBeast, which will do this patch in post for any codec. For now, install the attached AppleHDA.kext with KextBeast or the like for full support. Please note that Green rear port output DOES NOT work. Headphone front case works as main output. (fixed version in MultiBeast 6.4.1)
Special thanks to toleda for solving the mystery.
This fix has been added to MultiBeast 6.3.1+ under Audio > Realtek ALCxxx > Intel 9 Series Motherboard Support:

To get audio to work on 9 Series, you must binary patch 4 instances of 20 8C to A0 8C in the AppleHDAController binary. I've attached 3 pre-patched versions for testing.
We're going to make a patch available in the next MultiBeast, which will do this patch in post for any codec. For now, install the attached AppleHDA.kext with KextBeast or the like for full support. Please note that Green rear port output DOES NOT work. Headphone front case works as main output. (fixed version in MultiBeast 6.4.1)
Special thanks to toleda for solving the mystery.

This fix has been added to MultiBeast 6.3.1+ under Audio > Realtek ALCxxx > Intel 9 Series Motherboard Support:
