Originally Posted by waltinaz
- A question regarding the optical audio: I want to run the set’s native apps for some content, and send the audio to my Denon AVR for my surround-sound. I do NOT want to send this via ARC, as I have heard it’s twitchy, so are they any tips or recommendations on the best way to set this up?
Congrats on the new 77". I am jealous. 77" is perfect for me, but I wasn't prepared to shell out the big bucks for it, so I got the 65" and moved the TV closer to the seats.
I run ARC on my Marantz SR5010 (2015 model). Works fine IF I shut off Atmos on the C8.
With Atmos on, when using Netflix I get audio delay. Also, I've noticed occasional glitches when switching inputs. However, with Atmos off, I haven't noticed those glitches anymore, and there is no Netflix audio delay. To turn on ARC you need both SimpLink (HDMI-CEC) and ARC on in the LG settings. However, if you don't want to actually use HDMI-CEC, just turn it off in your receiver. That's how I have my C8 65" set up.
The reason I use ARC even with Atmos off is because the LG will send Dolby Digital Plus over ARC. For optical it sends only Dolby Digital, and the sound is hollower sounding to my ears, and I'm not even a golden ears type.
The strange part is it is impossible to shut off Atmos while in ARC mode. The option in the settings is greyed out. To shut it off, you need to set the TV to output to the integrated speakers, then shut off Atmos. Then you set the TV back to using ARC, and that Atmos off setting is reflected there. Probably an interface bug IMO, but that's the way it is.
- Speaking of optical audio, the Toslink cable wouldn’t “click” in to the Optical In input on the back. Seems kind of “loose”. Wondering if that’s an issue with the Toslink cable?
Some cables have looser connectors than others.
Also, slight issue on one input (rear-facing HDMI 4): Using a “certified” HDMI cable, I was getting repeated, slight bursts of “static”, which I interpreted as an HDMI handshaking issue. I moved it to side-facing HDMI 2, and it went away. Thoughts?
Sounds like it could be a cable issue. Try another cable. Even if a cable usually works fine in one port with one piece of equipment, it may not work fine in another port or with another piece of equipment, if it is a borderline cable.
BTW, for ARC, you'd need to use HDMI 2 anyway