[kobalsky]

I think in this case the point would be to trust the source publishing the audio and not content.

I cam see a gpg like registry where news stations publish their public keys to verify that their audio / video snippets have not been tampered with.

[ssfrr]

Yeah, this is my understanding also. I don't understand how this is better than the publisher signing the content with their own key though, rather than relying on a special microphone.

I wish the article was more clear on what threat model they're trying to address.