So this works perfectly in studio, but doesn't work in game. Pretty much it scales the part according to the music/sound. Also, It says nothing in Output.
Sound = game.Workspace.Sounds.Sound1
while true do
wait(0.001)
script.Parent.Scale = Vector3.new(script.Parent.Scale.X, Sound.PlaybackLoudness / 150, script.Parent.Scale.Z)
end

2 comments
it works in studio perfectly, but not in game.
You might want to lower that wait a little