__OSSIOWR
#define SNDCTL_MIX_NREXT __OSSIOWR('X', 3, int)
#define SNDCTL_MIX_EXTINFO __OSSIOWR('X', 4, oss_mixext)
#define SNDCTL_MIX_READ __OSSIOWR('X', 5, oss_mixer_value)
#define SNDCTL_MIX_WRITE __OSSIOWR('X', 6, oss_mixer_value)
#define SNDCTL_AUDIOINFO __OSSIOWR('X', 7, oss_audioinfo)
#define SNDCTL_MIX_ENUMINFO __OSSIOWR('X', 8, oss_mixer_enuminfo)
#define SNDCTL_MIXERINFO __OSSIOWR('X', 10, oss_mixerinfo)
#define SNDCTL_CARDINFO __OSSIOWR('X', 11, oss_card_info)
#define SNDCTL_ENGINEINFO __OSSIOWR('X', 12, oss_audioinfo)
#define SNDCTL_AUDIOINFO_EX __OSSIOWR('X', 13, oss_audioinfo)
#define SNDCTL_MIX_DESCRIPTION __OSSIOWR('X', 14, oss_mixer_enuminfo)
#define SNDCTL_DSP_SPEED __OSSIOWR('P', 2, int)
#define SNDCTL_DSP_STEREO __OSSIOWR('P', 3, int) /* OBSOLETE */
#define SNDCTL_DSP_GETBLKSIZE __OSSIOWR('P', 4, int)
#define SNDCTL_DSP_CHANNELS __OSSIOWR('P', 6, int)
#define SNDCTL_DSP_SUBDIVIDE __OSSIOWR('P', 9, int)
#define SNDCTL_DSP_SETFRAGMENT __OSSIOWR('P', 10, int)
#define SNDCTL_DSP_SETFMT __OSSIOWR('P', 5, int) /* Selects ONE fmt */
#define SNDCTL_DSP_SETPLAYVOL __OSSIOWR('P', 24, int)
#define SNDCTL_DSP_READCTL __OSSIOWR('P', 26, oss_digital_control)
#define SNDCTL_DSP_WRITECTL __OSSIOWR('P', 27, oss_digital_control)
#define SNDCTL_DSP_SYNCGROUP __OSSIOWR('P', 28, oss_syncgroup)
#define SNDCTL_DSP_SET_RECSRC __OSSIOWR('P', 38, int)
#define SNDCTL_DSP_SET_PLAYTGT __OSSIOWR('P', 40, int)
#define SNDCTL_DSP_SETRECVOL __OSSIOWR('P', 41, int)
#define SNDCTL_DSP_SET_CHNORDER __OSSIOWR('P', 42, unsigned long long)
#define SNDCTL_DSP_GETCHANNELMASK __OSSIOWR('P', 64, int)
#define SNDCTL_DSP_BIND_CHANNEL __OSSIOWR('P', 65, int)
#define MIXER_WRITE(dev) __OSSIOWR('M', dev, int)
#define SOUND_MIXER_WRITE_RECGAIN __OSSIOWR('M', 119, int)
#define SOUND_MIXER_WRITE_MONGAIN __OSSIOWR('M', 120, int)