Yeah, I got the Y-adapter for my modmic and the DS4 jack works quite well.  Only issue is that I'm getting some clicking sounds via ODAC amp.  It seems to occur when I've just rolled over a menu selection, almost like a ghost key tone. No idea as to why, maybe I'll try a different USB cable. 

yeah, I just now hooked it up.  I've tried it briefly, and only with the PS4.  The gain is turned to max and the volume still is a bit low.  I'm going to test it with PC and Android next.  Which audio setting is best on the PS4?

I've just purchased a Mayflower Electronic O2 ODAC Dekstop amp, modmic and a pair of Audeze LCD-2 headphones.  I'll let you know if it works, but I'm skeptical..