redpine: HSP Bluetooth profile doesn't work (only noise is produced)
While A2DP audio profile works well, switching to HSP profile leads to just an awful noise being played from the Bluetooth speaker.
On this recording, I have switched from A2DP profile to HSP, using Bluez 5.50 and PulseAudio 13.0:
You can hear there that when I paused the audio for a brief moment (around 11-12 sec mark), there was less noise coming out from the speaker (although some noise was still there even though nothing was playing). At the end I tried to switch back to A2DP, but it didn't work.
I have tried the latest driver/firmware combo from https://github.com/SiliconLabs/RS911X-nLink-OSD/tree/release/RS911X.NB0.NL.GNU.LNX.2.0.RC6 and the issue still happens there (in fact that's what I used to create recording above).