Audio Settings - RekordBox & FaceBook Live

Hi people.

I have a DDJ 400 and I am trying to go live on Face Book. However, I am not getting any proper audio.

What I am getting is echoey, cracking, feedback like audio.

I think I maybe getting my input and output settings wrong. I do not know if it is on the Rekordbox, the Windows or the Facebook end of the settings that I am getting wrong. 

Any ideas on what and how to select greatly appreciated!