I'm thinking of ordering one of these. I need a few questions answered though. 1. Is this compatible with PS4 chat? 2. If so, would the mic in the PS4 camera pick up my chat and feed it through to the mixamp along with the chat audio of the person I'm listening to? 3. Can you use an external mic with this mixamp? 4. I've got my PS4, 360, WDTV and Sky going into an optical switch with one optical out from that. Can I plug this one optical out into the mixamp then select inputs on the optical switcher? I'm after this as I've got to get a rid of my Creative Sound Blaster Recon3D and Omega wireless headphones. I've had a new hearing aid fitted and now can only use my Audio Technica phones. It's why I want a solution that allows for use of third party headphones and mic. Cheers if you can help.