On Monday 09 December 2019 14:47:26 Andrey Semashev wrote: > As a user, I don't know whether I can use SBC XQ. I don't know whether its > bitrate will fit in my radio conditions. If my device happens to support SBC > XQ, that is the codec that will get picked upon connection. Please, correct > me if I'm wrong, but I don't see a way to influence that. You can ask same question for aptX-HD codec. It has also fixed high bitrate. > SBC XQ is high quality and high bitrate, true, but PA should adapt to the > actual use conditions. SBC XQ is defined with usage of one specific bitpool value. > More so if it actually has the means to do so. If PA > detects that SBC XQ does not fit in BT bandwidth, it should gradually drop > quality. Maybe we can implement disconnecting SBC XQ profile when problem happen and connect again with SBC in Automatic quality. But there is another problem. People who chose high quality codec do not want to see that application itself without their instruction decide to change codec to low quality. This is reason why non-SBC codecs are used. Because they provide one fixed quality which is same whatever bluetooth adapter or headphone you will use. SBC is criticized for a long time because current implementations automatically choose some quality which is not under user control. So for these reasons there is SBC LQ, MQ, HQ and XQ. You can choose what you want to use. By default is automatic mode which decreasing quality. -- Pali Rohár pali.rohar@xxxxxxxxx _______________________________________________ pulseaudio-discuss mailing list pulseaudio-discuss@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
