I recently purchased a new TV and Soundbar. The audio is synchro fine when watching live TV but when I watch a DVRed program, there is a significant audio delay. I changed the STB audio setting to stereo as well as the advanced HDMI audio output to L-PCM but neither fixed the problem. My sound bar is connected to my TV by an optical wire and the STB to the TV with an HDMI cord. I don’t have a receiver. Any ideas on how to fix this when it is just the DVRed programs that suffer from the lipsynch issue??