SNDRV_CTL_IOCTL_ELEM_WRITE 973 include/uapi/sound/asound.h #define SNDRV_CTL_IOCTL_ELEM_WRITE _IOWR('U', 0x13, struct snd_ctl_elem_value) SNDRV_CTL_IOCTL_ELEM_WRITE 973 tools/include/uapi/sound/asound.h #define SNDRV_CTL_IOCTL_ELEM_WRITE _IOWR('U', 0x13, struct snd_ctl_elem_value)