I have a new Macbook which will not support 2 x external monitors. I like having 2 monitors becuase it helps me keep a handle on information. I bought a Plugable USB-C 4K Display Link port which does the twin monitor thing really well. I cried a bit when I bought it because it was expense on top of buying a new Macbook which was expensive in itself. Don't cry for me though, the Macbook goes like a stabbed rat.
My problem is that after a period of at best a couple of hours I begin to get a static-y scratching or rustling sound when I move the mouse, load new pages or drag pages around . This is there if my volume is up or down on my SSL 2+ interface. Once I reach up to my amp (1981 Mission Currys 1 - these days it would be called vintage, but we all know that vintage is only 1965 and earlier) and toggle between inputs the rustling goes. But it will be back later. I am using a Bluetooth Keyboard and Mouse.
All the kit is coming from the same dual point wall socket. I actually plugged the amp into the same 6 block as the hub/laptop/monitors and it got worse.
This is a genuine first world problem. But does anyone have any ideas?