I'm having the same problem but haven't found PCM mode to correct it only reduce it. I have a new LG 55UJ6540 and a new Vizio 5.1 soundbar. I even installed a high end HDMI to replace the one that came with the Vizio. I notice this in particular on Direct TV when watching Cinemax.
LG UHD TV digital sound out popping noise problem
in LG webOS Smart TV Questions
Posted
I'm having the same problem but haven't found PCM mode to correct it only reduce it. I have a new LG 55UJ6540 and a new Vizio 5.1 soundbar. I even installed a high end HDMI to replace the one that came with the Vizio. I notice this in particular on Direct TV when watching Cinemax.