#include <alsa/asoundlib.h>


int main()
{
    snd_mixer_t *handle;
    snd_mixer_selem_id_t *sid;

    snd_mixer_open(&handle, 0);
    snd_mixer_attach(handle, "default");
    snd_mixer_selem_register(handle, NULL, NULL);
    snd_mixer_load(handle);

    snd_mixer_selem_id_alloca(&sid);
    snd_mixer_selem_id_set_index(sid, 0);
    snd_mixer_selem_id_set_name(sid, "Capture");
    snd_mixer_elem_t* elem = snd_mixer_find_selem(handle, sid);

    snd_mixer_selem_set_capture_switch_all(elem, 0);
    snd_mixer_selem_set_capture_dB_all(elem, 0, 0);

    snd_mixer_close(handle);
}