Astro A50 (4th Gen) PC and PS4?

I would like to use my Astro A50 (4th Gen) on ps4 and PC. However I do not want to change the cable all the time and I would like to have microphone and sound on ps4 as well as pc.

Would it be possible with an optical splitter and a USB splitter?

So an optical from the base station which splits into 2 one goes to the PC and one to the PS4 and the same for USB. One has the switch between PC and PS4.

Or is it synonymous without splitting? With aux or something?

Try an AUX cable from the base in the PC and test it.

(I do it for example with my mobile or MAC and it works)

And how exactly should I do that? The pc has a micro connection and a headphone jack is ned only one as with the phone or mac

I think there's an adapter. I'm not sure if it works then