AC97_SURROUND_MASTER 38 include/linux/ac97_codec.h #define AC97_SURROUND_MASTER 0x0038 /* Surround (Rear) Master Volume */ AC97_SURROUND_MASTER 68 include/sound/ac97_codec.h #define AC97_SURROUND_MASTER 0x38 /* Surround (Rear) Master Volume */