John Ratzenberger is a voice actor for Teen Titans.
 Docter subsequently explained on the audio commentary track for Soul's home media releases that he wanted to come up with something more subdued for Ratzenberger's cameo in the film rather than go the traditional route of having a voice cameo
 AI startup Dessa created a computer-generated Joe Rogan's voice using thousands of hours of his podcast audio, while Ubisoft used speech synthesis to give thousands of characters distinguished voices in the video game Watch Dogs: Legion, and Google announced in 2020 their solution to generate human-like speech from text

