on GitHub for a technical deep dive into interacting with Jieli chips via command line. Refer to the Studiomaster Professional Manual
If you’ve recently plugged in a "Jieli BR21" and were confused to see a new storage drive or a generic audio device instead of a Bluetooth settings menu, you aren't alone. Despite its appearance as a standard Bluetooth dongle, the Jieli BR21 often identifies itself as a or USB Sound Card rather than a typical wireless adapter. Jieli Br21 Driver