From: Guillaume Martres <smarter3@xxxxxxxxx> Hi Sathish, Marcel, > I would really prefer to have some Tested-by lines from people that can verify that this patch works. Here's my experience: a recent pulseaudio MR [1] added support for mSBC. When I tried it using my laptop (Intel AX200) and headphones (Bose Headphone 700), the voice quality was extremely bad. I eventually realized that this could be fixed by ignoring all zero-filled packets sent by the headphones when decoding mSBC [2], after that everything worked fine. Since then, I was made aware of the existence of this patchset, after applying this patch (and [3] which apparently only exists as v5 and not v6), my headphones stopped sending zero-filled packets, but: - the recorded audio quality is again extremely bad and robotic. - when audio is being played, the headphones do not emit any sound. Note that I applied this patchset on top of the current Ubuntu 20.04 kernel [4], let me know if it's worth retesting on top of the mainline kernel, or if there is something else I could try. Hope this helps, Guillaume [1]: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/254 [2]: https://gitlab.freedesktop.org/smarter/pulseaudio/-/commit/bb716b03002841e1092b4200935566d5c1a951fe [3]: https://www.spinics.net/lists/linux-bluetooth/msg82149.html [4]: https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?h=Ubuntu-5.4.0-18.22&id=93dfa5b8e12fed29933f3451db44d88c0e4b5aed
