I have just switched from MacBook Pro to a laptop running (k)ubuntu 20.04.
When using my Bluetooth headset for the A2DP profile the music sounds excellent, unfortunately for the HSP/HFP profile the quality for both played and recorded sounds drastically drops, so that even my colleagues from the calls can experience this.
I know, that the HSP/HFP profiles cause the quality drop, but while running the same headset on MBP I wasn't able to observe that big issues.
What it might be caused by? Could it be some Bluetooth adapter issue, or rather driver-related? Am I missing some other Bluetooth profile dedicated to videocalls? Is it possible to improve the HSP/HFP audio quality on ubuntu 20.04?