> So if only run below commands, does the audio become good or not?
Yes, I confirm that the following lines are enough to make audio good:
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x08 sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x4ab7
> So if only run below commands, does the audio become good or not?
Yes, I confirm that the following lines are enough to make audio good:
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x08
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x4ab7