MSI GT62VR Laptop ALC899 Audio Problem

All audio inputs / outputs appear to be present, but there is no audio or active microphone.

MacOS version: 10.13.4 Motherboard name: MSI MegaBook GT62VR 6RE (MS-16L2) Chipset: Intel Sunrise Point HM170, Intel Skylake-H

I've tried all sorts of debugging, patching, kexting, etc. Much of which was no-doubt meant for desktop configurations. (Oops) I know it's possible because this guy with the identical codec made it work:

https://www.tonymacx86.com/threads/guide-msi-gf62vr-7rf-high-sierra-10-13-2.241725/

I've tried his methods, but still nothing. I've searched and found many threads on this topic, but it's either for a desktop system / different hardware, or it's something I've already tried. Please help me.


Multimedia:

Audio Adapter nVIDIA HDMI/DP @ nVIDIA GP104 - High Definition Audio Controller

Audio Adapter Realtek ALC899 @ Intel Sunrise Point PCH - High Definition Audio Controller [D-1]

submitted by /u/Xephrey
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