This is a big pain point for wireless headsets. Thanks for the post and linux overview of the progress.

>On Linux, LE Audio support is implemented through BlueZ for the Bluetooth® host stack and PipeWire for audio routing.

Most Linux systems support Bluetooth LEA via Gabeldorsche. Google shipped LEA support in Android 14 and BSP providers offered the drivers needed for it in their Android 14 BSPs.

I commend Collabora's tremendous work on Bluetooth LE audio on Linux and their work in general, but I can't help being frustrated that it's volunteer contributors handling the implementation, while the Bluetooth Special Interest Group makes a ton of profit by licensing Bluetooth yet contributes nothing to implementing the standard on Linux. It's really typical of the "open source" spirit: volunteers are exploited, and the fruits of their labor are harvested as profit.

This:

If you've ever wondered why your music quality drops dramatically when you answer a call on your Bluetooth® headset, you've experienced one of A2DP's key limitations firsthand.

Made me feel old ... how are people listening to music while taking a call?