Please, see below testing results.
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x78 sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x003e // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x77 sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x0015 // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x67 sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0xf000 // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x3b sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x60d9 // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x33 sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x8580 // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x1b sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x0a6b // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x1a sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x8003 // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x0f sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x02a2 // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x0e sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x65c0 // bad sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x08 sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x4ab7 // good, at this line sound works well and lines below are not necessary sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x06 sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x6115
Please, see below testing results.
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x78
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x003e
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x77
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x0015
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x67
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0xf000
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x3b
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x60d9
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x33
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x8580
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x1b
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x0a6b
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x1a
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x8003
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x0f
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x02a2
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x0e
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x65c0
// bad
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x08
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x4ab7
// good, at this line sound works well and lines below are not necessary
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x06
sudo hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x6115