@trytip I’ve ruled out the Civ games and it also happens independantly of Vivaldi, it’s just that that’s mostly when I’m listening to it. It’s a click / pop at irregular intervals and it happens regardless of what the PC is doing.
Restarting pulse doesn’t help and I’ve also disabled the GPU’s (1050Ti) onboard sound in KDE system settings so I’m a bit confused where it’s coming from. I had something a bit like this in Win10 and it was due to the sound driver software (MBD: A320M-K) auto-selecting the wrong device on the GPU but was solved by choosing the correct one on the MBD.
I have tried Pavucontrol which shows my MBD ouput active and the GPU inactive and it looks ok, but I noticed that clicking on the mute button made the same sound that I am complaining about so I tried muting with KDE and that does exactly the same - clicks every time I mute / unmute.
Edit: I found this:
… and tried it and fingers crossed it seems to be working, I’ll confirm in a few hours…