In a script under the Part

Choose sound from toolbox and rename to Sound

local sound = game.Workspace.Sound

local part = script.Parent

local function music()

if not sound.IsPlaying then

sound:Play()

end

end

part.Touched:Connect(music)

local sound = game.Workspace.Sound

local part = script.Parent

local function music(otherPart)

local humanoid = otherPart.Parent:FindFirstChild('Humanoid')

if humanoid then

if not sound.IsPlaying then

sound:Play()

end

end

end

part.Touched:Connect(music)