SOUND_MIXER_RECSRC  874 include/uapi/linux/soundcard.h #define SOUND_MIXER_READ_RECSRC		MIXER_READ(SOUND_MIXER_RECSRC)
SOUND_MIXER_RECSRC  904 include/uapi/linux/soundcard.h #define SOUND_MIXER_WRITE_RECSRC	MIXER_WRITE(SOUND_MIXER_RECSRC)