php man page for detect_digi_driver

detect_digi_driver(3alleg4)					  Allegro manual				       detect_digi_driver(3alleg4)

NAME
       detect_digi_driver - Detects whether the specified digital sound device is available. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int detect_digi_driver(int driver_id);

DESCRIPTION
       Detects whether the specified digital sound device is available. This function must be called _before_ install_sound().

RETURN VALUE
       Returns the maximum number of voices that the driver can provide, or zero if the hardware is not present.

SEE ALSO
       install_sound(3alleg4), reserve_voices(3alleg4)

Allegro 							   version 4.4.2				       detect_digi_driver(3alleg4)