Initial thoughts on this:

1) Following the massive spread of voice note coronavirus disinfo (such as on WhatsApp), this is concerning

2) This audio allows people to bypass community guidelines as with audio it’s much more difficult to detect violations and to moderate content https://twitter.com/twitter/status/1273306563994845185

3) How will this interact with copyright laws? @YouTube has huge issues with moderating illegally reproduced content (such as songs)

4) A profile photo always appears with the clip, meaning users can ascribe voice notes to photos of people not involved in the recording

Some benefits:

5) This is great for accessibility and will reach users for who audio is a better format of communication (such as partially sighted or blind users)

6) This will also open up a wave of new low-budget interactivity for Twitter too, espec. for creative outlets

A few sources/articles to read:

https://blog.twitter.com/en_us/topics/product/2020/your-tweet-your-voice.html

https://www.itv.com/news/central/2020-04-08/whatsapp-audio-recording-is-slammed-as-fake-news-by-public-health-england/

https://www.npr.org/2020/03/31/820174744/facebook-youtube-warn-of-more-mistakes-as-machines-replace-moderators