Script for simple playing of some sounds (tested in Godot 3.5)

gistfile1.txt

var audioplayers = []
var audioPlayerHacking

var randomPitch = {}
var volume = {}

func play(soundName):
    var audioplayer = null
    var index = -1
    for i in range(audioplayers.size()):
        if !audioplayers[i].playing:
            audioplayer = audioplayers[i]
            index = i
            break
    
    if audioplayer == null:
        return
    
    if randomPitch.has(soundName):
        if randomPitch[soundName] == null:
            randomPitch[soundName] = AudioStreamRandomPitch.new()
            randomPitch[soundName].set_random_pitch(1.5)
            randomPitch[soundName].set_audio_stream(load("res://sounds/" + soundName + ".wav"))
        
        audioplayer.set_stream(randomPitch[soundName])
    else:
        audioplayer.set_stream(load("res://sounds/" + soundName + ".wav"))
        
    if volume.has(soundName):
        setBusVolume(index, volume[soundName])
    else:
        setBusVolume(index, 0.0)
    
    audioplayer.play()
    
func setBusVolume(i, volume):
    AudioServer.set_bus_volume_db(i + 1, volume)

func _ready():
    for i in range(4):
        var audioplayer = AudioStreamPlayer.new()
        audioplayer.bus = AudioServer.get_bus_name(i + 1)
        audioplayers.append(audioplayer)
        get_node("/root/ui").add_child(audioplayer)
    
    audioPlayerHacking = AudioStreamPlayer.new()
    audioPlayerHacking.set_stream(load("res://sounds/win2.wav"))
    get_node("/root/ui").add_child(audioPlayerHacking)
    
    randomPitch["data"] = null
    randomPitch["enemy_move2"] = null
    randomPitch["lose"] = null
    
    volume["ufo_logo"] = 15.0
    volume["win3"] = -4.0
    volume["level_enter3"] = -2.0
    volume["enemy_move2"] = 0.0
    volume["enemy_move4"] = -1.0
    volume["lose"] = 3.0
    volume["data"] = 15.0
    volume["data3"] = -6.0