Live audience

That is because they edit in extra laughter and sounds in the editing. It sounds fake because of multiple takes, you don't get the same response to a joke the second or fifth time you hear it. The editors try to account for that. I would much rather have no audience noise, or no audience. I don't need to be told when to laugh - the original reason for laugh tracks was so that people would know it was appropriate to laugh at a segment of material.

I was actually in the audience for every episode and they would always change the jokes up or the scene a little. Everyone always laughed and we were never told to laugh. If a joke didn't work or get a response they changed it. ???