Allegro 5 api
#include <allegro5/allegro_audio.h> bool al_get_mixer_attached(const ALLEGRO_MIXER *mixer)
Return true if the mixer is attached to something.
al_attach_sample_instance_to_mixer(3alleg5), al_attach_audio_stream_to_mixer(3alleg5), al_attach_mixer_to_mixer(3alleg5), al_detach_mixer(3alleg5)