Ubuntu
alsa-ucm-conf package

  1. Bug #2029010
  2. Comment #13

Comment 13 for bug 2029010

Revision history for this message
In , tommaso.zanotti (tommaso.zanotti-linux-kernel-bugs) wrote :

I did some research and found that the 4 array microphone system is directly connected to the AMD CPU via the AMD ACP (Audio Co-Processor, PCI ID 1022:15e2).
AMD added support via the snd_rn_pci_acp3x kernel module in Linux 5.8.

AMD calls it TrueAudio (https://en.wikipedia.org/wiki/AMD_TrueAudio) and it's a technology to speed up audio processing (think of noise reduction).

The HDMI audio is instead managed by the snd_hda_intel kernel module.