al_set_default_voice - Man Page

#include <allegro5/allegro_audio.h>

void al_set_default_voice(ALLEGRO_VOICE *voice)

You can call this before calling al_restore_default_mixer to provide the voice which should be used. Any previous voice will be destroyed. You can also pass NULL to destroy the current default voice.

5.1.13

al_get_default_mixer(3)

ALLEGRO_EVENT(3), al_restore_default_mixer(3).