The truth is, they would invite some audience to the set to watch and record their laugher, but canned laughter is more often the laughter produced and inserted into series and comedies later.
⇑ Translate the sentence above by Google ⇑
Related: insert
Prev: He cleverly inserted mirrors above the window to create an impression of space.
Next: Wait for a couple of minutes with your mouth closed before inserting the thermometer.