snd_mixer_selem_id_set_index(sid, mixer_idx);
snd_mixer_selem_id_set_name(sid, mixer);
if (!(elem = snd_mixer_find_selem(m, sid))) {
snd_mixer_selem_id_set_index(sid, mixer_idx);
snd_mixer_selem_id_set_name(sid, mixer);
if (!(elem = snd_mixer_find_selem(m, sid))) {