pastrychef
Moderator
- Joined
- May 29, 2013
- Messages
- 19,460
- Motherboard
- Mac Studio - Mac13,1
- CPU
- M1 Max
- Graphics
- 32 Core
- Mac
- Classic Mac
- Mobile Phone
Could be AppleHDA perhaps. AppleALC certainly has hooks into it see here . At line #704 there are two patches that hook in. (Yes, lockdown is making me read crazy stuff!)
As to why HDMI audio is working without any kexts at all, points back to AppleHDA and as @jbarnette says above
The PCH audio is the motherboard audio.
If you look at the older methods to enable HDMI audio, toleda only mentioned Lilu and WhateverGreen.
AppleHDA HDMI Audio [Guide]
AppleHDA HDMI Audio_v2 [Guide] Most Intel/AMD/Nvidia desktop graphics systems Enables HDMI, DisplayPort and DVI (ex. AMD) audio Supports all macOS/OS X versions: 10.14, 10.13, 10.12, 10.11, 10.10 and 10.9 10.14/System Preferences/Sound/Output > DP audio on DP port + HDMI audio on HDMI port...
www.tonymacx86.com