SOUND_MIXER_ALTPCM
#define SOUND_MASK_ALTPCM (1 << SOUND_MIXER_ALTPCM)
#define SOUND_MIXER_READ_ALTPCM MIXER_READ(SOUND_MIXER_ALTPCM)
#define SOUND_MIXER_WRITE_ALTPCM MIXER_WRITE(SOUND_MIXER_ALTPCM)
{ SOUND_MIXER_ALTPCM, "PCM", 1 },
{ SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */
{ SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */