Voice Chats 2.0: Channels, Millions of Listeners, Recorded Chats, Admin ToolsMillions of Concurrent Listeners• Start limitless Voice Chats in Groups and Channels.
• Host discussions that can be listened to by millions of people simultaneously.
Voice Chat Recordings• Record voice chats to share or publish in Channels later.
• See that a chat is being recorded from the red dot next to its title.
Improved List of Participants• See user bio texts right from the list of participants.
• Raise your hand to show admins you want to speak.
Tools for Organizers• Create separate Voice Chat Invite Links for listeners or speakers.
• Change the title of your Voice Chat to give people an idea of the current topic.
• Join Voice Chats as one of your Channels to hide your personal account.
Swipe Action Settings• Choose which action is performed when you swipe left on a chat in your list: Pin, Mark as Read, Archive, Mute or Delete.
More about this update:
https://telegram.org/blog/voice-chats-on-steroids 
