As reported by the X user @phantomofearth, a new option called “Shared Audio” has appeared in the quick settings menu next to the “Project” button.
When activated, the user is prompted to select one or more audio devices - such as Bluetooth headsets or wired speakers - and begin broadcasting audio to them simultaneously.
Until now, Windows itself has not supported outputting audio to multiple devices simultaneously without the use of third-party software, such as OBS. The new feature appears to be designed to make this process easier for users, as its main competitors already offer such functionality.
It's unknown whether the new Shared Audio will support Auracast or allow for the simultaneous connection of different device types, such as Bluetooth earbuds, hearing aids, and wired headphones. The current stable version of Windows 11 supports Bluetooth LE audio, enabling the simultaneous connection of two compatible devices, albeit with certain limitations. Users often need to install specialized drivers, and the Settings menu only allows connecting devices sequentially. The new Shared Audio feature likely simplifies the process of selecting multiple devices at once.
It's pretty intriguing that Microsoft has not yet officially announced a new option - not even in its Insider blogs. The Shared audio will likely appear in future stable releases of Windows 11 if the testing phase is successful.