[pulseaudio-discuss] Bi-directional Bluetooth A2DP

Pali Rohár pali.rohar at gmail.com
Sat Jul 28 19:34:19 UTC 2018


Some Bluetooth A2DP codecs like aptX Low Latency or FastStream provides
"backchannel" support for voice data. And it really in A2DP profile.

It can be very useful as there is no need to switch between A2DP and HSP

Now I was able to get FastStream codec (rebranded SBC) working in
PulseAudio. And in "btmon" I see that my headset started sending
backchannel voice data in SBC codec. I decoded that dump and it is
really SBC codec, voice is in very good quality, better then in
HSP profile. I hope that bluez can send them to pulseaudio via file

Question is, how to handle this configuration in pulseaudio? Should it
be a new profile for bluetooth devices which would provides both sink
and source? Because now A2DP is one-direction profile, not

Pali Rohár
pali.rohar at gmail.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 195 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20180728/bbebe2d8/attachment.sig>

More information about the pulseaudio-discuss mailing list