SOUND_MIXER_SPEAKER
{ AudioNspeaker, SOUND_MIXER_SPEAKER },
#define SOUND_MIXER_READ_SPEAKER MIXER_READ(SOUND_MIXER_SPEAKER)
#define SOUND_MIXER_WRITE_SPEAKER MIXER_WRITE(SOUND_MIXER_SPEAKER)
#define SOUND_MASK_SPEAKER (1 << SOUND_MIXER_SPEAKER)