I am facing the same problem with Ubuntu 20.04.1 LTS, using Sennheiser HD450 BT. I can switch between A2DP and HSP profiles, A2DP works great for music. When I switch to HSP, it reduces audio quality and sounds like a telephone and the mic is not working at all.
I am facing the same problem with Ubuntu 20.04.1 LTS, using Sennheiser HD450 BT. I can switch between A2DP and HSP profiles, A2DP works great for music. When I switch to HSP, it reduces audio quality and sounds like a telephone and the mic is not working at all.