set_volume (3) - Linux Manuals
set_volume: Alters the global sound output volume. Allegro game programming library.
Command to display set_volume manual in Linux: $ man 3 set_volume
NAME
set_volume - Alters the global sound output volume. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void set_volume(int digi_volume, int midi_volume);
DESCRIPTION
Alters the global sound output volume. Specify volumes for both digital
samples and MIDI playback, as integers from 0 to 255, or pass a negative
value to leave one of the settings unchanged. Values bigger than 255 will
be reduced to 255. This routine will not alter the volume of the hardware
mixer if it exists (i.e. only your application will be affected).
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