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LG OLED

I'm awaiting delivery of an LG 55EG9100, but this question probably applies to most of the LG OLEDs. There are two audio outs on this, S/PDIF over toslink and HDMI/ARC. For the output, you can choose either "auto" or PCM. For "auto," the format will depend on the source and can be PCM, Dolby digital, or DTS/PCM. The way the menu is formatted, it suggests all of these are available on both ARC and TOSlink.

My question is whether anyone knows whether the TV mixes down the various channels to 2-channel PCM or whether it is sending multi-channel PCM? If it is 2-channel, which I suspect must be the answer for Toslink, does anyone know whether it is being intelligent in the mixing vs., say, just taking a pair of L/R and dropping everything else?

I want to put a cheap DAC on the toslink to add headphones or feed into an old analog Adcom pre-amp. The answer to the question determines whether that DAC needs to be a 5.1 channel to L/R or it can be a 2-channel DAC. For a 5.1 DAC, I'd probably use the Orei DA34 and for a 2-channel I'd probably use the Schiit Modi 2 Uber. I should say that I'm not trying to get great A/V sound. I just want basic function so that I can focus my resources on upgrading the existing 2-channel audio system for music in the future. (Please don't let that last comment distract us into A/V vs. hi-fi/audio :-) )
efrank

Showing 3 responses by efrank

efrank OP
6 posts
 
Must be the day....my 55EG9100 arrived today at 2PM.
efrank OP
6 posts
 
Thanks for redirect me to AVS forums. It took a couple days to be registered, so I just posted a question there.
efrank OP
6 posts
 
A 55" was the right size for us, but it only comes as a curved display, not flat. I almost didn't order it for this reason, but now that it is here, I like the curved screen. I find that moving a bit one way or the other in front of the curved screen can reduce reflections a huge amount. At least, I think it is because of the curve, but others have complained the other direction. In any case, the picture is superb and I'm glad we got one.

Back to the original question:  I ended up punting and just getting a cheap DAC that handles 5.1 formats. The original idea had been to hope for a 2 channel and then get a "good DAC" that would also be useful for music. I'm glad to have gotten the cheap 5.1 DAC because it means I don't need to reconfigure the audio out on the TV when I want to use the headphones. So, the final configuration was to take the optical out through an active splitter, then to an Orei DA34 DAC, and from there to a little headphone amp. The other leg of the splitter goes to a sound bar. My objective in this setup was to direct the cash towards the TV and minimize expenditures on the TV audio so that I can use the saved money later for the audio equipment that I use for music. 
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