We have collected the most relevant information on Bluez Audio Gateway. Open the URLs, which are collected below, and you will find all the info you are interested in.
Bluetooth - freedesktop.org
https://freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Bluetooth/
Audio Gateway role - the device that the hands-free device is connected to. The HFP profile is typically used for cellular phone calls, and this is the device that is connected to the cellular network. ... (BlueZ 4 support is retained, though, so systems that still use BlueZ 4 keep working as before.) More details in the release notes ...
BlueZ
Release of BlueZ 5.56. 24th February 2021, 07:10 pm by Tedd Ho-Jeong An. This release introduces the new management API for the advertisement monitor feature and adds extended advertising parameters and data, updates the license clause with the matching SPDX License Identifier. It also includes some bug fixes in Mesh, test-runner, tester ...
'Re: [PATCH] BlueZ support for audio gateway role …
https://marc.info/?l=linux-bluetooth&m=123269957918379
Currently it enables bluez to be seen as audio device by phone, and audio events are sent to (and received by) bluez. No audio yet, and phone reports a couple errors to bluez, probably due to the fact that it is requesting bluez to open 2 SCO channels and that isn't handled yet.
Unable to get connect data for Headset Voice gateway ...
https://github.com/Arkq/bluez-alsa/issues/339
Also there is a possibility, that your Bluetooth chip is configured in a wrong way - it sent/read audio to chip's PCM interface, but bluealsa requires audio on HCI interface. Bluealsa configures this only for Broadcom chips, but there are other chips with different manufacturer ID, but require the same treatment.
How to switch my phone to Headset Audio Gateway …
https://askubuntu.com/questions/1261148/how-to-switch-my-phone-to-headset-audio-gateway-hsp-hfp-in-pulseaudio
In Ubuntu 20.04 the switch between a2dp and headset_audio_gateway (HSP/HFP) happens automagically. I do use ofono as its suggested in many threads like this one: How to set up Ubuntu PC as bluetooth headset to attend calls. you could force the switch by adding to file with editor of choice (mine is vim): vim /etc/pulse/default.pa.
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