SOUND_MIXER_LINE2  834 include/uapi/linux/soundcard.h #define SOUND_MASK_LINE2	(1 << SOUND_MIXER_LINE2)
SOUND_MIXER_LINE2  866 include/uapi/linux/soundcard.h #define SOUND_MIXER_READ_LINE2		MIXER_READ(SOUND_MIXER_LINE2)
SOUND_MIXER_LINE2  896 include/uapi/linux/soundcard.h #define SOUND_MIXER_WRITE_LINE2		MIXER_WRITE(SOUND_MIXER_LINE2)