Symbol: AC97_MIXEXT_SURROUND
sys/dev/sound/pcm/ac97.c
527
ac97_rdcd(codec, AC97_MIXEXT_SURROUND) == 0x8080) {
sys/dev/sound/pcm/ac97.c
528
codec->mix[SOUND_MIXER_OGAIN].reg = AC97_MIXEXT_SURROUND;