6 original functions (Div / Div 2):
change_sound(channel id, volume, frequency);
is_playing_sound(channel id);
[returns 0 if the sound channel is stopped and 1 if it is playing]
set_volume(volume);
- volume: 0-100 to increase or decrease the overall volume of the game
sound(sound id, volume, frequency);
- sound id: returned by the sound file loaded with load_sound ()
- volume: 0 for minimum volume, maximum volume to 256
- frequency: 256 is the standard rate
stop_sound(channel id);
unload_sound(sound id);
