How do I make a audio switcher part?

I plan to make something where when you go to a different level it plays different audio and I already have a part that plays audio but not I need to know how to make a part to stop audio playing. If you can tell me how to make a part to make audio stop playing or switch music than either one is fine.

Something like this might work:

local sound = the.directory.to.audio.object

function stopaudio()
	sound:Stop()
end

script.Parent.Touched:connect(stopaudio)