al_rewind_audio_stream - Allegro 5 API

       Set  the  streaming file playing position to the beginning.  Returns true on success.  Currently this can
       only be called on  streams  created  with  al_load_audio_stream(3alleg5),  al_play_audio_stream(3alleg5),
       al_load_audio_stream_f(3alleg5) or al_play_audio_stream_f(3alleg5).

Allegro reference manual                                                         al_rewind_audio_stream(3alleg5)

       al_rewind_audio_stream - Allegro 5 API

              #include <allegro5/allegro_audio.h>

              bool al_rewind_audio_stream(ALLEGRO_AUDIO_STREAM *stream)