al_destroy_sample - Allegro 5 API

       Free  the  sample  data  structure.   If it was created with the free_buf parameter set to true, then the
       buffer will be freed with al_free(3alleg5).

       This function will stop any  sample  instances  which  may  be  playing  the  buffer  referenced  by  the
       ALLEGRO_SAMPLE(3alleg5).

       al_destroy_sample - Allegro 5 API

al_destroy_sample_instance(3alleg5), al_stop_sample(3alleg5), al_stop_samples(3alleg5)

Allegro reference manual                                                              al_destroy_sample(3alleg5)

              #include <allegro5/allegro_audio.h>

              void al_destroy_sample(ALLEGRO_SAMPLE *spl)