Laugh track

An example laugh track recorded in 2009

A laugh track (or laughter track) is an audio recording consisting of laughter (and other audience reactions) usually used as a separate soundtrack for comedy productions. The laugh track may contain live audience reactions or artificial laughter (canned laughter or fake laughter) made to be inserted into the show, or a combination of the two. The use of canned laughter to "sweeten" the laugh track was pioneered by American sound engineer Charles "Charley" Douglass.

A waveform of an audio track in Audacity with a fake laughter mixed with real studio audience applause which follows immediately after fake laugh

The Douglass laugh track became a standard in mainstream television in the U.S., dominating most prime-time sitcoms and sketch comedies from the late 1950s to the late 1970s. Use of the Douglass laughter decreased by the 1980s upon the development of stereophonic laughter. In addition, single-camera sitcoms eliminated audiences altogether. Canned laughter is used to encourage the viewer to laugh.


Laugh track

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