Latest update has released lipsync ability but things have changes a bit so decided to make this tutorial for creating lipsync
Warning: for those reading this I will not cover how to convert your audio to .WEM there are plenty of guides for this; head here if questions of making audio in CK
https://www.youtube.com/watch?v=x7y4knnvhzE&t=1s&pp=ygUSc3RhcmZpZWxkIGF1ZGlvIGNr
Important: There must be no spaces in the game/CK path. Otherwise, CK will throw an error.