get_volume - Retrieves the global sound output volume. Allegro game programming library.

       Retrieves  the global sound output volume, both for digital samples and MIDI playback, as integers from 0
       to 255. Parameters digi_volume and midi_volume must be valid pointers to int, or NULL if  not  interested
       in specific value.

       get_volume - Retrieves the global sound output volume. Allegro game programming library.

set_volume(3alleg4), get_hardware_volume(3alleg4)

Allegro                                           version 4.4.3                              get_volume(3alleg4)

#include<allegro.h>voidget_volume(int*digi_volume,int*midi_volume);