Why doesn't this music play immediatly?

repeat wait () until game.Workspace.CurrentCamera ~= nil
game.Workspace.Sound:Play(143299986)

local c = game.Workspace.CurrentCamera
local data = LoadLibrary("RbxUtility").DecodeJSON(script.CutsceneData.Value)
local rs = game:GetService("RunService").RenderStepped

function tweenCam(c1,f1,time,fov,roll)
    local c0,f0,fv0,r0,frames = c.CoordinateFrame,c.Focus,c.FieldOfView,c:GetRoll(),time/0.015
    for i = 1,frames do
        c.CameraType = "Scriptable"
        c.CoordinateFrame = CFrame.new(c0.p:lerp(c1.p,i/frames),f0.p:lerp(f1.p,i/frames))
        c.FieldOfView = (fv0+(fov-fv0)*(i*(1/frames)))
        c:SetRoll(r0+(roll-r0)*(i*(1/frames)))
        rs:wait()
    end
end

print("Running")
c.CameraSubject = nil   
c.CameraType = "Scriptable"
c.CoordinateFrame = CFrame.new(unpack(data[1].c1))
c.Focus = CFrame.new(unpack(data[1].f1))
c.FieldOfView = data[1].FOV
c:SetRoll(data[1].Roll)
if script:findFirstChild("SkipCutsceneGuiValue") then
    local gui = script.SkipCutsceneGui:clone()
    gui.Parent = game.Players.LocalPlayer.PlayerGui
    gui.Cutscene.Value = script
    gui.Main.Debug.Disabled = false
    script.SkipCutsceneGuiValue.Value = gui
end
for i = 2,#data do
    tweenCam(CFrame.new(unpack(data[i].c1)),CFrame.new(unpack(data[i].f1)),data[i].step,data[i].FOV,data[i].Roll)
end
c.CameraSubject = game.Players.LocalPlayer.Character.Humanoid   
c.CameraType = "Custom"
c.FieldOfView = 70
if script:findFirstChild("SkipCutsceneGuiValue") then
    if script.SkipCutsceneGuiValue.Value ~= nil then
        script.SkipCutsceneGuiValue.Value:Destroy()
    end
end
game.Workspace.Sound:Stop(143299986)
script:Destroy()

Hey, I'm making a cutscene with sound, and when I put in this script (including cutscene script) The music plays after like 20 seconds, almost when the cutscene is over.