Sound volume based on player speed broken?

This script basically functions by taking the speed of a player and dividing it by a reasonable amount to add a "wind background" while they're moving along. The script is under a screengui and two frames. I have the basic function below, I was trying to attempt to have the sound only play for the player alone but I got an error saying Failed to load sound 3308152153: Unable to download sound data (x2) Is there any way I can avoid this or fix this problem? Thanks in advance!

--player = 
 boop = game.Players.LocalPlayer
if boop.Character then
player = boop.Character
end
--sound =
local sound = Instance.new("Sound") -- make sound
sound.SoundId = "3308152153" -- put the ID of your sound here
sound.Parent = player -- put sound in player
repeat wait() until sound.Loaded == true -- wait until it is loaded
sound.Looped = true
sound.Volume = 0
sound:Play() -- play the sound

wait(1)
while true do       
    a = math.floor(player.Head.Velocity.magnitude*10)/10
    script.Parent.SpeedValue.Text = (a)
    if a < 30.1 then
        sound.volume=0
    elseif a > 30 and a < 70.1 then
        sound.volume= a/25
    else
    sound.volume= a/20
    end
    wait(0.1)
end