I wrote to LG and Denon about an audio problem. The following is what I said:
"I wrote previously about my inability to pass-through a "Dolby Atmos + TrueHD" signal from my OLED C9 via eARC to my Denon receiver. Dolby TrueHD passes-through properly; Dolby Atmos does not. I have additional information for you.
Today, I routed my Blu-Ray player directly through the Denon X3400H via HDMI3, then to my LG OLED55C9, instead of inputting to the LG, then to the Denon. Both 'Dolby Atmos' and 'Dolby TrueHD' displayed as expected. More significantly, the sound quality has, apparently, improved; 5.1.2 vs 7.1?
I found the same audio problem when using the LG's apps to watch Amazon Prime shows, such as "Jack Ryan": there is no Atmos signal via eARC, but one is present when the C9's internal speakers are used.
It seems to me that the eARC pathway is not properly passing-through the audio signal from my LG C9 to my Denon receiver. You might want to have a look into that."
Last edited by mhmercer; 05-29-2019 at 05:04 PM.