After ordering my Beam I had read a number of posts surrounding lip sync issues between the Beam and LG OLED TV's. I received my Beam yesterday and hooked it all up (Full 5.1 setup)......... and there were no issues whatsoever with lip Sync. I used the HDMI ARC input and everything was totally fine.
I was extremely weary after reading all the negative posts.........but for me it worked like a dream.
I have a LG B6 Model that I purchased in November 2016 and I used my own HDMI Cable versus the one provided to me in the box (it was too short to go through my wall).
I did nothing special with the controls...... I basically just followed the instructions on the App.
I just think everyone needs to try for themselves as the blanket statements regarding LG OLED TV'S is quite misleading.
P.S. the Beam sounds pretty darn amazing with the full 5.1 setup........ but certainly holds it's own all by itself.