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HeyGen adds speech direction tags to its voice API

HeyGen’s November API changelog adds inline delivery tags such as whispers and laughs to text-to-speech requests. Public and instant voices support the tags across three HeyGen Voice models; professional voice clones do not. The entry gives no exact day, and this is an API capability rather than a new trained voice model.

HeyGen

HeyGen Voice audio tags

Audio

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Primary source · HeyGen

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