Bluetooth

Bluetooth on Linux

• Bluetooth headset - Archlinux wiki

Lot of detailed information.

Bluetooth codecs

Some detailed information:

• Understanding Bluetooth codecs - SOUNDGUYS.
• The ultimate guide to Bluetooth headphones: Wired is still king for quality - SOUNDGUYS

Mention the new SONY WH-1000XM3 !

• Audio quality of SBC XQ Bluetooth audio codec - SoundExpert

Including a long discussion on the support of SBC_XQ on PulseAudio, available patches, and faulty devices.