al_destroy_sample_instance - Allegro 5 API

       Detaches  the sample instance from anything it may be attached to and frees it (the sample data, i.e. its
       ALLEGRO_SAMPLE, is not freed!).

       al_destroy_sample_instance - Allegro 5 API

al_create_sample_instance(3alleg5)

Allegro reference manual                                                     al_destroy_sample_instance(3alleg5)

              #include <allegro5/allegro_audio.h>

              void al_destroy_sample_instance(ALLEGRO_SAMPLE_INSTANCE *spl)