I get the same values for both axiom /home/dean/linux-6.11.3/sound/pci/hda # hda-verb /dev/snd/hwC0D0 0x5a SET_COEF_INDEX 0x00 nid = 0x5a, verb = 0x500, param = 0x0 value = 0x0 axiom /home/dean/linux-6.11.3/sound/pci/hda # hda-verb /dev/snd/hwC0D0 0x5a SET_PROC_COEF 0x00 nid = 0x5a, verb = 0x400, param = 0x0 value = 0x0 axiom /home/dean # hda-verb /dev/snd/hwC0D0 0x5a SET_COEF_INDEX 0x00 nid = 0x5a, verb = 0x500, param = 0x0 value = 0x0 axiom /home/dean # hda-verb /dev/snd/hwC0D0 0x5a SET_PROC_COEF 0x00 nid = 0x5a, verb = 0x400, param = 0x0 value = 0x0