One of the problems I’ve had for a long time now is that I have multiple sound sources but want to have only one set of speakers and one set of headphones/headset on my desk. I don’t want to sit here with 3 of each. A couple years ago I had purchased some Bose speakers which had 2 inputs and a dial on the front of the speakers which allowed fading between the two sources. It was a workable solution for 2 computers. Add a 3rd or 4th sound source and it starts to feel … insufficient.