SOUND_MIXER_NONE  799 include/linux/soundcard.h #define SOUND_MIXER_ENHANCE	SOUND_MIXER_NONE
SOUND_MIXER_NONE  800 include/linux/soundcard.h #define SOUND_MIXER_MUTE	SOUND_MIXER_NONE
SOUND_MIXER_NONE  801 include/linux/soundcard.h #define SOUND_MIXER_LOUD	SOUND_MIXER_NONE
SOUND_MIXER_NONE 2131 sound/oss/ad1848.c 			if (n == SOUND_MIXER_NONE)