How do I make a sound play on Touch event?

This is basically a sound region. For some people it might be hard but this can be solve easily. So add a part and let name this Sound1. Then add a script in the Sound1 and type this

Sound 1 script

local sound = "rbxassetid://413625451"--change the number for this
script.Parent.Touched:Connect(function(hit)
 if hit.Parent:FindFirstChild("Humanoid") then
  local player = game.Players:GetPlayerFromCharacter(hit.Parent)
  game.ReplicatedStorage.PlayMusic:FireClient(player,sound)
 end
end)

then go to ReplicatedStorage and add a RemoteEvent and name it PlayMusic

then go to StarterGui and insert a sound but don't put any id in it. Once you insert the sound you need to add a local script in the sound or music and type this.

Sound Music local script that is in StarterGui

-- Must be inside the Sound in StarterGui

game.ReplicatedStorage.PlayMusic.OnClientEvent:Connect(function(sound) -- PlayMusic is the name of the RemoteEvent. Change it if you have a different name.
    if script.Parent.SoundId ~= sound then
        script.Parent:Stop()
        script.Parent.SoundId = sound
        script.Parent:Play()
    end
end)

fix that code to:

function Touch(tea)

Hum = tea.Parent:FindFirstChild("Humanoid") -- Your parameter is tea, not hit the parameter here is the part that touched 

if tea ~=nil then

script.Parent.Music:Play()
end

end

Your error is that you are not calling the function. A function is a segment of code only runs when you call it through code(either through events or just inlcuding the name of the function with parantheses when needed) So this is how I would do what you were asking

local part= script.Parent


part.Touched:Connect(function(hit) -- another error is that in your case, you're using tea as a
--parameter, but the event of the function includes the part that touched it, and you're using the ----parameter tea in the wrong way. So I am using hit to find the humanoid, and if there is, music ----will play.
    if hit.Parent:FindFirstChild("Humanoid") then
    part.Music:Play()
    end
end