Sound Volume changes for LocalPlayer?

Hi Honoroll123, firstly, do you use a LocalScript? If yes, it is your first error because LocalScript is a script for the client and not for the Server. Secondly, use ReplicatedStorage for isolate sound to one player and not everyone. So, use ServerScript "Script", ClientScript "LocalScript" and a RemoteEvent for realised your project.

But, why use a RemoteEvent and how use it? It is a best solution for your problem and it work with FilteringEnabled.

How use? Is simple! For run the client to server use this

:FireClient(Player)

And for run the server with the Client use this

:FireServer()

Now! How insert RemoteEvent? Ever simple!

Script

local ReplicatedStorage = game:GetService('ReplicatedStorage')

local Event = ReplicatedStorage.RemoteEvent

script.Parent.Touched:Connect(function(hit)
	local Player = game:GetService('Players'):GetPlayerFromCharacter(hit.Parent) -- For find who is the player
	if Player then
		Event:FireClient(Player) 
	end
end)

LocalScript

local ReplicatedStorage = game:GetService('ReplicatedStorage')

local Event = ReplicatedStorage.RemoteEvent
local Sound = ReplicatedStorage.Sound

local Debounce = true

Event.OnClientEvent:Connect(function()
	if Debounce then -- Use debounce for not loop
		Debounce = false
		Sound:Play()
		Sound.Ended:wait()
		Debounce = true
	end
end)

So put LocalScript in PlayerGui or other player storage..

Sorry for my error in my text i'm a Quebecker and i speak french, so I hope this will help you and I have make this in mobile so I could not test