2 problems (  if you have others solutions, it is welcome ) :

Still not satisfied with final microphone's rendering, but I've tried, that was fun...

- I can't use anymore kinect microphone inside chrome ( refused )

- Microphones orientation, hidden

About chrome :

Uncheck this, from main sound card

Install this tool : http://www.vb-audio.com/Voicemeeter/index.htm

Setup :

Ohh and don't forget to check Vocimeter as microphone inside chrome

- About microphones orientation, I think it was a bad idea to open and drill the kinect...