AC97_CM9761_MULTI_CHAN
snd_ac97_update_bits(ac97, AC97_CM9761_MULTI_CHAN, 0x3c88, val);
val = snd_ac97_read(ac97, AC97_CM9761_MULTI_CHAN);
snd_ac97_write_cache(ac97, AC97_CM9761_MULTI_CHAN, val);