al_get_audio_stream_attached - Allegro 5 API

       Return whether the stream is attached to something.

       al_get_audio_stream_attached - Allegro 5 API

al_attach_audio_stream_to_mixer(3alleg5),                       al_attach_audio_stream_to_voice(3alleg5),
       al_detach_audio_stream(3alleg5).

Allegro reference manual                                                   al_get_audio_stream_attached(3alleg5)

              #include <allegro5/allegro_audio.h>

              bool al_get_audio_stream_attached(const ALLEGRO_AUDIO_STREAM *stream)