https://techcrunch.com/2023/02/01/inaudible-watermark-could-identify-ai-generated-voices/

The growing ease with which anyone can create convincing audio in someone else’s voice has a lot of people on edge, and rightly so. Resemble AI’s proposal for watermarking generated speech may not fix it in one, but it’s a step in the right direction.

AI-generated speech is being used for all kinds of legitimate purposes, from screen readers to replacing voice actors (with their permission, of course). But as with nearly any technology, speech generation can be turned to malicious ends as well, producing fake quotes by politicians or celebrities. It’s highly desirable to find a way to tell real from fake that doesn’t rely on a publicist or close listening.