SND_VOL_C_MAX
KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
int16_t volume[SND_VOL_C_MAX][SND_CHN_T_VOL_MAX];
int8_t muted[SND_VOL_C_MAX][SND_CHN_T_VOL_MAX];