Non overlapping multiple sounds

To play sounds that never overlap even when multiple are played at fast rate do this:

• Put an AudioStreamPlayer in the root of the project, call it sfx. All sounds will start from here.
• Preload the sound as already suggested

  var pling := preload("res://sounds/pling.ogg")

• In an autoload script put this to init the audio player

  var player
  var playback
  func _ready():
    player = get_node("sfx")
    player.stream = AudioStreamPolyphonic.new()
    player.play()
    playback = player.get_stream_playback() as AudioStreamPlaybackPolyphonic

• In the same script define this function

  func play_sound(sound_data):
    playback.play_stream(sound_data)

• Use this whenever you want to play the preloaded 'pling' sound:

  play_sound(pling)