SOUND_MIXER_SPEAKER
#define SOUND_MASK_SPEAKER (1 << SOUND_MIXER_SPEAKER)
#define SOUND_MIXER_READ_SPEAKER MIXER_READ(SOUND_MIXER_SPEAKER)
#define SOUND_MIXER_WRITE_SPEAKER MIXER_WRITE(SOUND_MIXER_SPEAKER)
{ SOUND_MIXER_SPEAKER, "Beep", 0 },
{ SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */
{ SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */