al_play_sample - Allegro 5 API

       Plays  a  sample  on one of the sample instances created by al_reserve_samples(3alleg5).  Returns true on
       success, false on failure.  Playback may fail because all the reserved  sample  instances  are  currently
       used.

       Parameters:

       • gain - relative volume at which the sample is played; 1.0 is normal.

       • pan - 0.0 is centred, -1.0 is left, 1.0 is right, or ALLEGRO_AUDIO_PAN_NONE.

       • speed - relative speed at which the sample is played; 1.0 is normal.

       • loop - ALLEGRO_PLAYMODE_ONCE, ALLEGRO_PLAYMODE_LOOP, or ALLEGRO_PLAYMODE_BIDIR

       • ret_id  -  if non-NULL the variable which this points to will be assigned an id representing the sample
         being played.  If al_play_sample(3alleg5) returns false, then the contents of ret_id  are  invalid  and
         must not be used as argument to other functions.

       al_play_sample - Allegro 5 API

al_load_sample(3alleg5),            ALLEGRO_PLAYMODE(3alleg5),           ALLEGRO_AUDIO_PAN_NONE(3alleg5),
       ALLEGRO_SAMPLE_ID(3alleg5),              al_stop_sample(3alleg5),               al_stop_samples(3alleg5),
       al_lock_sample_id(3alleg5).

Allegro reference manual                                                                 al_play_sample(3alleg5)

              #include <allegro5/allegro_audio.h>

              bool al_play_sample(ALLEGRO_SAMPLE *spl, float gain, float pan, float speed,
                 ALLEGRO_PLAYMODE loop, ALLEGRO_SAMPLE_ID *ret_id)