AC97_REG_HEADPHONE_VOLUME  164 dev/ic/ac97.c  		AC97_REG_HEADPHONE_VOLUME, 6, 0, 1, 0, 0x8000
AC97_REG_HEADPHONE_VOLUME  995 dev/pci/cs4281.c 	cs4281_write_codec(sc, AC97_REG_HEADPHONE_VOLUME, 0);