I HAVE THE ASTRO a40 with mix amp pro, i am using them with xbox one x. The xbox has an option in the audio settings to use an headset audio setting called Dolby Atoms for headphones. Also when you first get the headset the way you set it up on xbox is to use stereo uncompressed, Optical audio - Bitstream out, bitstream format - Dolby digital. Thats the default setup. Now if i was to use the dolby atoms for headphones setting, i just turn that on in xbox audio settings, then check the box that says using HDMI or optical audio headset. Now i just what is the better option to choose.