audio_update_gains

///@function audio_update_gains(gain, base_gains_array)
///@description update the gain settings for all audio assets. It takes into account the base settings as a relative value and apply an overall gain setting passed as arg0. Itended to be used when changing the gain setting while the game is running
///@param gain
///@param sound_base_gains_array

var _gain = argument[0];
var _sound_base_gains_array = argument[1];
var _debug_string = "The gains were update for ";
var _len  = array_length_1d(_sound_base_gains_array);
for (var i = _len - 1; i>=0 ; i--)
{
    if audio_exists(i)
    {
        audio_sound_gain(i,_sound_base_gains_array[i] *_gain, 0);
        _debug_string += "\n" + audio_get_name(i) + ": " + string(audio_sound_get_gain(i));
    }
}

show_debug_message(_debug_string);