Charley Douglass was first guy who could make anyone laugh at the push of a button. The sound engineer invented the laff box and the laugh track technique, which was quickly adopted by television in the 1960s and named sweetening. The laff box was a typewriter-like machine that could produce a specific type and sequence of laughter needed for a particular situation. No one but Douglass and his immediate family members knew what the inside of the laff box looked like, which added to its mysterious appeal.
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