Abstract: This article examine through the lens of the Journal des théâtres and its critiques, the different techniques experimented with by actors in the second half of the eighteenth century, designed to mark the disorder and outburst of emotions. It shows that actors favoured the interruption of speech, the addition of words or sounds, and stammering to make the flow jerky. Finally, dissonance involved a range of techniques such as moaning, shouting or discordant diction.