Dear audio science enthusiasts,
I recently got one of those popular LG C1 TVs. Since I only have a stereo system, but several HDMI sources plus using the TV's apps, I went the easiest audio route for my setup:
(source) -> TV -> optical out (PCM) -> DAC -> analog Preamp
As I realized only after my purchase, the optical out of LG TVs seems to be quite terrible (noisy) across models
and LG seems to not care about it. Most clearly it's stated in an FAQ by JDS Labs
, who measured SINAD of 81db from one LG TV. Quite a few people complain about stuttering audio as well, coming from some DAC's jitter handling not "expecting" such a terrible source signal. Now my DAC doesn't have that problem*, but I'm still curious if using an HDMI audio extractor may yield a better signal.
So my question is if anyone has tested or seen this measured for LG TVs in particular: optical out vs extracted from ARC HDMI?
I've seen at least one report where people have tried the extractor route without solving their stuttering audio problem, which leads to the question if LG has only messed up the optical output or digital audio output in general.
Here's a thread from AV Forums about the topic
* DAC is a Lake People RS-06, which the manufacturer claims has a resampling and re-clocking implementation that "almost completely rejects jitter". I have no idea to which % this is marketing mumbo jumbo, but at least I get no interruptions to audio.