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Audio through Old AVR with HDMI 2.1 Video

I'm upgrading to a LG CX TV along with a RTX 3080 in the near future.  LG's 65" is actually on sale for $1900 today.  But my receiver only supports HDMI 2.0, and I would really like to keep using it for my 5.1 channel audio setup.   What's the best way for me to achieve this?   I really don't want to ditch my perfectly good receiver.   So help would be quite appreciated.

 

Current options I can think of:

 

1. Run an extra HDMI cable to my AVR and extend the display so I can send audio to it. 

-This seems to break HDCP 2.2 support.

-Having an unconnected screen is really annoying.

 

2.  Use Gen 1 ARC to send Dolby Atmos to my AVR

-Audio has bad latency and is buggy.  (Tested on my 2017 TV.  It might work better on the CX)

 

3.  SP/DIF output on the TV.

-Not sure if the TV can convert PCM to dolby digital for me or not.

-Also not ideal due to low audio quality.

 

4.  USB to HDMI audio converter

-Haven't been able to find a good one yet. 

-It would need to present itself to Windows as pure audio device.  So a device like that might not exist.

 

One more thing about this windows installation is it's running as a VM on unRAID.  But that shouldn't really matter

 

 

 

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@LinusTech I think I recall you running into a similar issue before.  TL;DR I want to upgrade to 4k@120 TV setup but keep using my old AVR for 5.1 ch audio.  Best option?

 

BTW to everyone else, I'm aware it's very unlikely Linus will respond

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48 minutes ago, marcgii said:

@LinusTech I think I recall you running into a similar issue before.  TL;DR I want to upgrade to 4k@120 TV setup but keep using my old AVR for 5.1 ch audio.  Best option?

 

BTW to everyone else, I'm aware it's very unlikely Linus will respond

When I tried this, 1 was the best solution I found.

 

I've since gone the sound bar route so I just go straight to my TV now.

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He used solution 1, with a tool to disable the mouse going to the non-existent display. 

 

That's the pain with AVRs, if you want a clean setup you've got no choice but to replace them every time a new display standard comes out. Maybe you can still sell that one for a decent price since not everyone will be going 2.1 anytime soon?

 

EDIT: Welp, sniped by the man :P

F@H
Desktop: i7-5960X 4.4GHz, Noctua NH-D14, ASUS Rampage V, 32GB, RTX2080S, 2TB NVMe SSD, 2x16TB HDD RAID0, Corsair HX1200, Thermaltake Overseer RX1, Samsung 4K curved 49" TV, 23" secondary

Mobile SFF rig: i9-9900K, Noctua NH-L9i, Asrock Z390 Phantom ITX-AC, 32GB, GTX1070, 2x1TB NVMe SSD RAID0, 2x5TB 2.5" HDD RAID0, Athena 500W Flex (Noctua fan), Custom 4.7l 3D printed case

 

Dell XPS 2 in 1 2019, 32GB, 1TB, 4K

 

GPD Win 2

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I'll look into a new AVR.  Unfortunately right now apparently many receivers can't properly display at 4k@120 due to a major bug. 

https://www.forbes.com/sites/johnarcher/2020/10/24/ps5-and-xbox-series-x-friendly-av-receivers-reportedly-hit-by-major-hdmi-bug/?sh=61959f9597e5

 

On top of that, the CX series is still having a major stuttering issue when G-sync is enabled.  LG is "confident" they can provide a firmware fix.  I'm praying they're correct.  

https://www.forbes.com/sites/johnarcher/2020/10/20/lg-pledges-to-fix-latest-oled-tv-nvidia-rtx-30-glitch/#73bf09d6314b

 

This is what happens when the first source hardware is late AF to the market lol. 

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Here's the video and software Kilrah alluded to earlier.  The software Linus used was Dual Monitor Tools.  Thankfully I found that video because I never would have found the program.  

 

It seems Linus was able to game without issue while having an extra phantom display connected.  So that's promising.

 

http://dualmonitortool.sourceforge.net/index.html

 

 

This video is just over a year old.  But my god does it feel so much older lol.

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That's the beard for you, @LinusTech looks 5 years wiser since the addition 😆

F@H
Desktop: i7-5960X 4.4GHz, Noctua NH-D14, ASUS Rampage V, 32GB, RTX2080S, 2TB NVMe SSD, 2x16TB HDD RAID0, Corsair HX1200, Thermaltake Overseer RX1, Samsung 4K curved 49" TV, 23" secondary

Mobile SFF rig: i9-9900K, Noctua NH-L9i, Asrock Z390 Phantom ITX-AC, 32GB, GTX1070, 2x1TB NVMe SSD RAID0, 2x5TB 2.5" HDD RAID0, Athena 500W Flex (Noctua fan), Custom 4.7l 3D printed case

 

Dell XPS 2 in 1 2019, 32GB, 1TB, 4K

 

GPD Win 2

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14 hours ago, Kilrah said:

That's the beard for you, @LinusTech looks 5 years wiser since the addition 😆

Yeah the beard is half of it lol.  But also BFGDs are nearly irrelevant now and it was back when Shadow was around

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