Ok this may be the dumbest thought today or the "why didnt I do that sooner" thought

I have two systems (pc's) running One set of headphones and one set of speakers

I know how to physically connect the two so that I can either listen to sounds coming form one pc or the other

But can I digitally connect them Sort of a desktop (screen) mixer?

Like for video there is synergy2

is there one for audio?