[pulseaudio-discuss] SBC XQ for PA 13.0

Andrey Semashev andrey.semashev at gmail.com
Mon Dec 9 14:10:52 UTC 2019

On 2019-12-09 15:57, Hyperion wrote:
> 09.12.2019, 12:33, "Andrey Semashev" <andrey.semashev at gmail.com>:
>> I have another piece of feedback to provide. Sometimes I experience
>> audio dropouts. Sometimes in both left and right headphones, sometimes
>> just one. In particular, I noticed this happen when I have a
>> Bluetooth-connected DualShock 4 gamepad connected and playing games, but
>> it also happens without it, although less often.
>> I assume this is caused by Bluetooth bandwidth limitation. Note that EOZ
>> Air are "truly wireless" (i.e. the two headphones connect wirelessly),
>> and I have multiple WiFi networks available (one access point in the
>> same room as the Bluetooth transmitter, a few others behind walls). I
>> expect 2.4 GHz radio to be rather crowded. The gamepad and the
>> headphones are in the same room as the Bluetooth transmitter, in clear
>> direct visibility, so it can't get better than that.
>> I can see Pali's patches offer reduce_encoder_bitrate API that is
>> supposed to mitigate this problem, but both SBC XQ profiles don't allow
>> bitrate reduction. I think, SBC XQ desperately needs to support bitrate
>> reduction, as the codec with the highest bitrate out of all.
> Yes, and my patch was providing 100% adaptative SBC XQ, with native bitpool
> reduction, as you suggest.

Is this adaptation implemented in


? If so, then either the audio dropouts I experience are caused by 
something other than bandwidth limitation, or the adaptation isn't 
working or helping.

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