Audio and transcripts. Which could have been amended to the existing NIP or added as a second event. That's how nostr:nprofile1qqsrhuxx8l9ex335q7he0f09aej04zpazpl0ne2cgukyawd24mayt8gprfmhxue69uhhq7tjv9kkjepwve5kzar2v9nzucm0d5hszxmhwden5te0wfjkccte9emk2um5v4exucn5vvhxxmmd9us2xuyp and I plan on doing it. That was devs and users have choice. Now we have two audio NIPs that aren't compatible. It's like making a new NIP for pictures with a new tag when we already have kind:20.