Since version 0.3.59, PipeWire supports LE Audio’s Basic Audio Profile (BAP) for Connected Isochronous Streams (CIS) with the Low Complexity Communication Codec (LC3), see https://www.linkedin.com/posts/collabora_add-bluetooth-le-audio-support-1360-activity-6978014601649037312-7W6d/.

Thanks to the modular architecture of PipeWire, it is ready for future codecs.

It supports bi-directional audio and can act as a Central or Peripheral device. In the former case, it allows the end-user to select a new audio profile, while in the latter, it automatically connects Bluetooth audio streams to the local audio input and output. This paves the way for Auracast support in BlueZ and PipeWire.

If you are interested in trying this, the LC3 codec from https://github.com/google/liblc3.git must be installed. The PipeWire meson build must be configured with the option `-Dbluez5-codec-lc3=enabled`.

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[Client/Central] [bluetooth]# power on [bluetooth]# endpoint.register 00002bc9-0000-1000-8000-00805f9b34fb 0x06 [/local/endpoint/ep0] Auto Accept (yes/no): y [/local/endpoint/ep0] CIG (auto/value): a [/local/endpoint/ep0] CIS (auto/value): a Capabilities: 03 01 ff 00 02 02 03 02 03 03 05 04 1e 00 f0 00 ................ Endpoint /local/endpoint/ep0 registered [bluetooth]# endpoint.register 00002bcb-0000-1000-8000-00805f9b34fb 0x06 [/local/endpoint/ep1] Auto Accept (yes/no): y [/local/endpoint/ep1] CIG (auto/value): a [/local/endpoint/ep1] CIS (auto/value): a Capabilities: 03 01 ff 00 02 02 03 02 03 03 05 04 1e 00 f0 00 ................ Endpoint /local/endpoint/ep1 registered [bluetooth]# scan on [bluetooth]# scan off [bluetooth]# connect [NEW] Transport /org/bluez/hci0/dev_00_AA_01_01_00_02/pac_source0/fd0 Endpoint: SetConfiguration Transport /org/bluez/hci0/dev_00_AA_01_01_00_02/pac_source0/fd0 Device: /org/bluez/hci0/dev_00_AA_01_01_00_02 Auto Accepting... [NEW] Transport /org/bluez/hci0/dev_00_AA_01_01_00_02/pac_sink0/fd1 Endpoint: SetConfiguration Transport /org/bluez/hci0/dev_00_AA_01_01_00_02/pac_sink0/fd1 Device: /org/bluez/hci0/dev_00_AA_01_01_00_02 Auto Accepting... [bluetooth]# transport.acquire /org/bluez/hci0/dev_00_AA_01_01_00_02/pac_sink0/fd1

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