if (irandom(sound_probability) == 1)
{
    for (var sound_to_play = choose(322, 323, 324); sound_to_play == sound_last; sound_to_play = choose(322, 323, 324))
    {
    }
    audio_sound_gain(sound_to_play, 0.05, 0)
    audio_sound_pitch(sound_to_play, 0.45)
    audio_play_sound(sound_to_play, 1, 0)
    sound_last = sound_to_play
    sound_probability = 800
}
if (sound_probability > 350)
    sound_probability--