Old AVR connection to new TV

[BuToNz]

Looking for a bit of advice here as I've been out of the AV loop for a while.

Been running a 1080p TV + 1080p AVR hooked up to some nice floorstanders (Surround, center and sub too) for a while now. Currently hook up a bunch of devices to the AVR and then a single HDMI to the TV from the AVR output.

This includes my PC that I play the odd DTS/Dolby enabled movie from. Even though the TV has a few smart functions I basically ignore them and use the PC connection. Since it all runs through the AVR I don't use ARC., the main use case is playing PC games.

So getting to the point - I've just purchased an LG C1 (awaiting delivery) and want to make full use of the 4k 120hz. I have a 30 series card and HDMI 2.1 cable so I think I'm good to go from a picture standpoint but what about sound?

How could I make use of my current AVR/Speaker combo in the most efficient way (Highest available bitrate etc.) without replacing anything?

I have more than the 4 devices than the TV has HDMI connections (4 vs 6 on the AVR). Could I run all the 1080p devices through the AVR still and just hook the PC up directly. Then somehow pipe the audio back to the AVR? I guess avoiding an optical connection as that's super compressed audio right?

Any advice greatly appreciated. Even if it's just 'You're an idiot, just buy a new 4k AVR'

 

[BuToNz]

@lucid Thanks for the detailed response. This does seem like an option but I have some reservations - will the audio extractor work with the 4k 120hz signal? I see it's rated at 18gbps but 4k 120hz requires 48gbps?

Also - is there a way to just pull the audio from the TV into the AVR via eARC on the TV to the ARC enabled port on my AVR? Keeping all devices apart from the PC connected to the AVR with the output from the AVR to the TV providing the video and also doing the ARC for the PC-TV connection? Would it just be simpler to use an optical cable and take the bandwidth hit? I think the AVR only supports Dolby TrueHD and DTS-HD although honestly I could 'make do' with a slightly degraded audio experience for ease of use/setup.

Just for reference the AVR is a Denon 1912 and I have various 1080p capable only devices connected. I may add a 4k Android Box at some point but I certainly won't be using any of the inbuilt LG smart features. Main focus is that PC connection using the full 4k/120hz and getting sound into the AVR system.

I guess I'm hesitant to start looking at 4k AVR's as I'm still very happy with the audio experience I get from my Q Acoustics 2000 series + Denon. I've spent a lot of time tweaking things!

 

[BuToNz]

@lucid I see now, I was being a bit of a doughnut there. Somehow thought I'd need to run the 2.1 HDMI into that box and then another out to the TV/AVR. Makes sense now.

Thanks a lot for taking the time to respond, I think I'll go for the extractor

 

[BuToNz]

@ljt Assuming you have a model which looks like the one lucid linked...I think you've probably connected it wrong.

I've got my working like this:
C1 HDMI2 (eARC/ARC)> eARC/ARC (Out 1) then Audio (Out 2) to an Input on the AVR (NOT the ARC enabled port just standard input). Don't use the input port.

Make sure the dip switch is set to eARC.