alsa-project/alsa-ucm-conf issue #345 was opened from pseudocc:

Even if it is set to the maximum value, headphone microphone is good.

http://alsa-project.org/db/?f=0fdb2be1be960a5efe41fdcc5aab9436f4c91d1f

Issue URL : https://github.com/alsa-project/alsa-ucm-conf/issues/345 Repository URL: https://github.com/alsa-project/alsa-ucm-conf