man get_mixer_channels (3): Returns the number of output channels. Allegro game programming library.

get_mixer_channels(3) Returns the number of output channels. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

int get_mixer_channels(void);

Returns the number of output channels. 2 for stereo, 1 for mono, 0 if the mixer isn't active.