SOUND_MIXER_CD    827 include/uapi/linux/soundcard.h #define SOUND_MASK_CD		(1 << SOUND_MIXER_CD)
SOUND_MIXER_CD    859 include/uapi/linux/soundcard.h #define SOUND_MIXER_READ_CD		MIXER_READ(SOUND_MIXER_CD)
SOUND_MIXER_CD    889 include/uapi/linux/soundcard.h #define SOUND_MIXER_WRITE_CD		MIXER_WRITE(SOUND_MIXER_CD)