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ChadB
ChadB
Trending Lyricist I
November 22, 2017
Question

Apple TV 4K + LG OLED55C7P + Playbar/etc. + Belkin Ultra High Speed HDMI Cables

So I recently invested in the LG OLED55C7P, which is gorgeous. I can now run my individual HDMI sources (Cable, Apple TV 4K, Xbox One 😵 to the TV, and audio out through optical to the playbar and beyond. All was good for video and sound - 5.1 for each source, and I didn't need a splitter (I used the Octava before, with my old TV).

In reading about Dolby Vision, etc., I saw that Apple recommended the Belkin Ultra High Speed HDMI cable. I saw conflicting opinions, but I wanted to use the best that I could, so I bought the cable and stuck it between the Apple TV and the TV. Boom - I started getting the 'Unsupported Audio' error in Sonos. I recycled power for everything, tweaked the TV audio output settings, tweaked the Apple TV audio output settings, and no luck. So, I swapped the good old HDMI cable back in, and life is fine.

So my question is - does anyone have perspective on why this cable, which I'd assume would be backward compatible, would have issues? The TV (2017 model) can pass through Dolby Digital/DTS multichannel via Optical, and it works fine with the non-Belkin cable between the Apple TV and it. I'm still getting Dolby Vision via the Apple TV with the old cable, so I don't seem to have lost anything, but it didn't make sense to me, so I figured I'd ask the experts!

Thanks in advance for any thoughts.
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    49 replies

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    ChadB
    ChadBAuthor
    Trending Lyricist I
    November 26, 2017
    Oh shoot, just saw your second post, that stinks. Extractor time then.
    marksawbo
    Trending Lyricist II
    November 26, 2017
    If you haven’t already, check out this for good picture settings.

    http://www.rtings.com/tv/reviews/lg/c7-oled/settings

    I may order the £100 extractor I linked above as it may be my only option.
    ChadB
    ChadBAuthor
    Trending Lyricist I
    November 26, 2017
    Yeah I based mine on those as a good starting point. I've been scouring the AVS forums also. With each firmware upgrade, they need to get tweaked it seems. I really need a professional I think - the TV is too good to not get that touch I think.
      Moosh
      Lyricist III
      November 27, 2017
      I’m having the same exact problem, same setup...looking forward to your next update
      marksawbo
      Trending Lyricist II
      November 27, 2017
      I’m having the same exact problem, same setup...looking forward to your next update

      Do you have Apple TV or Nvidia Shield? Not that it matters. Me and ChadB should have our extractors tomorrow and we’ll update the thread.
      Moosh
      Lyricist III
      November 27, 2017
      Apple TV 4k, cable set top box, LG OLED65C7P, Playbar, Sub, and two play:1 surrounds connected via optical to tv and hdmi to devices. The set top cable box typically work fine. The apple tv navigational clicks and certain apps work fine with the sound, but I run into issues playing shows in Netflix or iTunes movies previews, etc. Sometimes it carries over to the cable box if I change inputs back while the audio is out on the Apple TV. Changing back and forth doesn't always work for me...so frustrating....thank you guys for posting your troubleshooting and results
      ChadB
      ChadBAuthor
      Trending Lyricist I
      November 27, 2017
      I received the optical splitter today. J-tech extractor should come tomorrow. I've been running the pixel compensation slide cycles since football ended yesterday. Figured I might as well earn some progress there in the meantime 🙂.
      marksawbo
      Trending Lyricist II
      November 27, 2017
      What are the pixel compensation slide cycles?
      ChadB
      ChadBAuthor
      Trending Lyricist I
      November 27, 2017
      It's running full-screen slides of red, yellow, black, blue, grey, etc. You do it for 4 hours at a time, at which point the LG will do a compensation cycle (pixel refresh) when you turn the set off. The AVS forum folks swear by them for new sets,
      Moosh
      Lyricist III
      November 28, 2017
      Question for you both....which HDMI port are you using that’s giving you problems? I was digging around and noticed ARC was a common denominator for a bunch of similar problems. I switched my Apple TV from HDMI 2 (ARC) to HDMI 3 and apparently my problem went away...not extensively tested but content for audio that has never worked is working now
      Show more replies
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