- snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
- snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
+ snd_mixer_selem_get_playback_volume_range(pcm_mixer, &min, &max);
+ snd_mixer_selem_get_playback_volume(pcm_mixer, SND_MIXER_SCHN_MONO, &vol);