So it's not possible to listen to music on the pc and make phone calls and still have the music playing in the background as a light background?

Do you mean that the mobile phone and PC are connected at the same time? It works. But mehhhh... doesn't work optimally. Often disconnects itself. Without reason. When I'm in teams and a message arrives on my mobile, it kicks me out. But that's also the only flaw with these things.