[tantalor]

It is not clear that the voice is synthetic

[orbital-decay]

Hold on, are we looking at the same video and Twitter message? [1] He clearly states what he's doing, and in the video he launches some program that appears to speak in Attenborough's voice. How clear is clear enough?

[1] https://nitter.woodland.cafe/charliebholtz/status/1724815159...

[petemir]

It’s not clear from the voice alone