I finally got my audio setup sorted. I have my Audioengine A5+ speakers hooked to an Audioengine D1 DAC, which is connected to my desktop (Dan A4) via USB for power & audio input. Then I have my PS4 Pro connected to the D1 via optical cable to route the PS4’s sound to my speakers. I connect my Audio Technica M50x on the D1 DAC if I want to used headphones. And finally i have a Blue Yeti mic in black on a Rode PSA1 boom arm.
The Audioengine D1 DAC prioritizes the optical input, so when I boot the PS4 it automatically changes signal sources. I did opt for quality RCA and optical cables which I got from The Listening Room, nothing fancy though. They do have a noticeable difference in static noise and crackling over generic cables you can get at Ace Hardware or the like.
On a side note: I like how my desktop is smaller yet more powerful than its PS4 Pro neighbor. It packs an 8 core, 16 thread cpu with a GTX 1070.