"make sure for play it fades in and for stop it fades out and also make sure that it remembers the players choice even if they leave the server, so if a player has it stopped remember it for that player"

-- server script 
local DataStoreService = game:GetService("DataStoreService")
local musicDataStore = DataStoreService:GetDataStore("MusicDataStore")

local button = script.Parent
local sound = script.Parent.Parent.Sound

button.MouseButton1Click:Connect(function()
    local player = game.Players.LocalPlayer
    local userId = tostring(player.UserId)
    local musicState = musicDataStore:GetAsync(userId)
    
    if button.Image == 'rbxassetid://176572847' then
        button.Image = 'rbxassetid://176572749'
        sound:Stop()
        sound:FadeOut(1)
        musicDataStore:SetAsync(userId, false)
    else
        button.Image = 'rbxassetid://176572847'
        sound:Play()
        sound:FadeIn(1)
        musicDataStore:SetAsync(userId, true)
    end
end)

game.Players.PlayerAdded:Connect(function(player)
    local userId = tostring(player.UserId)
    local musicState = musicDataStore:GetAsync(userId)
    
    if musicState == false then
        button.Image = 'rbxassetid://176572749'
        sound:Stop()
    else
        button.Image = 'rbxassetid://176572847'
        sound:Play()
    end
end)