Sound keeps playing over and over again even after you die, how to fix?

So I'm making an AI with a magnitude script that plays music when he chases you. The problem is, when you respawn for some reason, the music starts as if you entered the vicinity of the enemy and it does that every time except for the first time. Can someone please help me fix this? Thanks!

Here are the two scripts that people helped me make:

local part1 = game.Workspace.Neighbor.Torso --The torso of your AI
local player = game.Players.LocalPlayer --Gets the player
local part2 = game.Workspace:WaitForChild(player.Name):WaitForChild("Torso") --The player
local Sound = game.Lighting.Sound --Your Sound, place in PlayerGui for local sound instead of global

while true do
	local magnitude = (part1.Position - part2.Position).magnitude
	if magnitude < 50 then
		if not Sound.IsPlaying then
        	Sound:Play()
		end
	elseif magnitude >= 50 or game.Workspace:FindFirstChild(player.name):FindFirstChild("Torso") then
		if Sound.IsPlaying then
        	Sound:Stop()
    	end
	end
	wait(0.01)
end

Character = script.Parent
Humanoid = Character.Humanoid

function Check()
while true do
	wait(0.1)
	if game.Lighting.Sound.IsPlaying then
		game.Lighting.Sound:Stop()
	end
end
end

Humanoid.Died:connect(Check)
game.Players.LocalPlayer.CharacterAdded:connect(Check)

For the first script is should be:

local part1 = game.Workspace.Neighbor.Torso --The torso of your AI
local player = game.Players.LocalPlayer --Gets the player
local part2 = game.Workspace:WaitForChild(player.Name):WaitForChild("Torso") --The player
local Sound = game.Lighting.Sound --Your Sound, place in PlayerGui for local sound instead of global

while true do
    local magnitude = (part1.Position - part2.Position).magnitude
    if magnitude < 50 then
        if not Sound.IsPlaying then
            Sound:Play()
        end
    elseif magnitude >= 50 or game.Workspace:FindFirstChild(player.name):FindFirstChild("Torso") then
        if Sound.IsPlaying = true then --Add true
            Sound:Stop()
        end
    end
    wait(0.01)
end

For the second script it should be:

Character = script.Parent
Humanoid = Character.Humanoid

function Check()
while true do
    wait(0.1)
    if game.Lighting.Sound.IsPlaying = true then --Add true
        game.Lighting.Sound:Stop()
    end
end
end

Humanoid.Died:connect(Check)
game.Players.LocalPlayer.CharacterAdded:connect(Check)