void snd_ctl_free_one(snd_kcontrol_t * kcontrol);
int snd_ctl_add(snd_card_t * card, snd_kcontrol_t * kcontrol);
int snd_ctl_remove(snd_card_t * card, snd_kcontrol_t * kcontrol);
void snd_ctl_free_one(snd_kcontrol_t * kcontrol);
int snd_ctl_add(snd_card_t * card, snd_kcontrol_t * kcontrol);
int snd_ctl_remove(snd_card_t * card, snd_kcontrol_t * kcontrol);