Today Apple is releasing iOS 11.4 and finally bringing AirPlay 2 out of beta. The update brings the much anticipated multi-room audio support along with stereo pairing to Apple TV and the HomePod. Multi-room support means you can play the same music on multiple HomePods or Apple TVs in different rooms, simultaneously. And you'll be able to ask Siri to play a given song in the bedroom or in the living room. With AirPlay 2 you'll be able to add supported speakers to the Home app to use alongside HomePod. Currently Sonos is working on adding AirPlay 2 support to its speakers. Stereo...
Source: https://www.gsmarena.com/ios_114_brings_multiroom_audio_and_stereo_pairing_to_homepod_with_airplay_2-news-31351.php