Provided by: allegro5-doc_5.0.11-2_all 

NAME
al_is_audio_installed - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro_audio.h>
bool al_is_audio_installed(void)
DESCRIPTION
Returns true if al_install_audio(3alleg5) was called previously and returned successfully.
al_is_audio_installed(3a... Allegro reference manual()