al_rewind_audio_stream man page
al_rewind_audio_stream — Allegro 5 API
#include <allegro5/allegro_audio.h> bool al_rewind_audio_stream(ALLEGRO_AUDIO_STREAM *stream)
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(3), al_load_audio_stream_f(3) and the format-specific functions underlying those functions.