Level 1

32 points

New LG CX OLED Audio skipping

Got a new LG CX OLED 55 inch yesterday. I hooked it up to my 4th gen Apple tv. Now picture quality is great, but my audio keeps cutting in and out, like it stuttering. I bought a good quality HDMI cable and have since actually tried several HDMI cables and they all do the same thing. I also tried all 4 HDMI ports on the TV same result. If I use the build in app on the TV using WEBPOS they are fine no audio issues. I have tried every option in the TV for sound and in Apple TV same issue. It's like apple TV isn'y able to keep up with the audio or something. Any idea what would cause audio to cut in and out? I posted over at Apple TV reddit but no one has a clue LOL, seems like I am the only person having this issue. Running the latest official version for Apple TV didn't work also downloaded the latest beta version that didn't work either. If you go on Reddit apparently there is a ton of people having the same issue with Apple TV and this LG TV. pretty sure it's an Apple TV problem though because all my other streaming devices work perfectly fine with the LG TV.

Apple TV 4K, tvOS 14

Posted on Oct 3, 2020 7:59 PM

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Farp96 Author

Level 1

32 points

Posted on Oct 4, 2020 4:14 PM

Okay I pretty much figured it out. If you watch any video that has Dolby Atmos sound that's when it's going to screw up. So if you watch a video on Netflix that has Dolby Atmos sound you'll be fine. As soon as you exit out of that and say launch a video on YouTube or any other video type app that isn't Dolby Atmos enabled that's when the audio will start skipping. Somehow when you try to play a video that isn't Dolby Atmos enabled after just watching one that was it screws up the audio. So what you have to do is basically restart the Apple TV turn your TV off then turn it back on and then you can watch anything that isn't Dolby Atmos enabled and the audio will be perfectly fine. You can go into Netflix again and watch a video that has Dolby Atmos sound but once you're finished you have to restart your Apple device turn your TV off and turn it back on then normal audio will be fine. so anytime you see the Dolby Atmos sound Logo Pop up in the top right hand corner you'll know that when you're done watching whatever you're watching you'll have to restart Apple TV and your TV unless you're going to another video that is Dolby Atmos enabled then you'll be fine it's only when you go to regular audio that it starts to screw up. I know this isn't a fix it's more like a Band-Aid. But the problem definitely is software based and it's from the Apple TV. none of my other streaming devices and I've tried almost all of them do this only Apple TV. If others are having the same issue you should try what I suggested and try duplicating what I did. I'm going to send this off to Apple tech support as well

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85 replies

mr_yaffe

Level 1

4 points

Nov 24, 2020 2:01 PM in response to HipGD

Same issue with LG GX, Sonos ARC and Apple TV 4K. After watching Dolby Atmos material the sound on other formats will drop out. The Netflix trick worked the first time around, but when I tried again I couldn't get the sound to stop glitching. For me it worked going into the sound menu on the LG and switching Digital Sound Out to PCM and back again to Pass-Through.

Ghiizhar

Level 1

4 points

Dec 11, 2020 9:10 PM in response to Farp96

I just experienced this problem after watching a Dolby Atmos video on my Apple TV and LG CX 48. I tried various things such as powering down TV, restarting and power down Apple TV, etc and nothing worked.

I then moved my ATV from HDMI port 3 to #1 where my Xbox had been plugged in. Low and behold, the apple TV problem was resolved. I then moved it back to HDMI 3 and the problem reoccurred. Out of curiosity, I then plugged my Xbox Series S into HDMI 3 and it manifested the same audio problem!

I powered down everything, restarted the CX, ATV, and Xbox and the problem was still present. If I plugged the ATV or Xbox into #3, the problem was there, If I plugged either into #1 all was well.

At that point, I googled the problem and found this thread. I saw an answer further down that said unplugging the CX resolved the issue. so I tried that and SUCCESS, the problem went away. So in my case, the problem somehow affected the HDMI port 3, and did not matter if I had the ATV or Xbox plugged into it. and conversely, plugging the ATV into HDMI #1 fixed the issue, unless I plugged it back into HDMI 3....

zyzzyz

Level 1

12 points

Dec 13, 2020 12:55 PM in response to Ghiizhar

For me it was ATV on HdMi 2 and then after switch ATV hdmi 1 and the issue seemed to be resolved but later issue came back. Tried other devices on hdmi 2 and same issue. Seems some incompatibility issue on the Dolby codec between ATV and CX and causing issue on the TV until restarting tv

MJOSCAR

Level 1

4 points

Dec 13, 2020 1:04 PM in response to zyzzyz

No, they changed me the motherboard thinking it was that the problem. After turned on the TV with the new motherboard didn’t reproduce the issue because the firmware in the new was an older version and of course it was an update available, after the update the problem showed. So after investigation and showing them that the problem show when using Dolby Atmos for any source connected to the TV, then was when they told me that a new update will come to resolve this.

Those any sources connected directly to the sound bar don’t have the issue, so clearly the problem is the TV.

Dec 20, 2020 3:24 AM in response to chrischris75

The strange thing is that I’ve had my 55CX TV with ATV4k and Sonos Arc soundbar for 3weeks playing Atmos content before this problem happened and I found myself in this forum. In my case restarting ATV doesn’t fix. Powering TV off and on doesn’t fix. Switching to nVidia Shield TV Pro and no issues

rkaufmann87

Level 10

148,458 points

Oct 5, 2020 5:39 PM in response to Farp96

1. Restart Modem.

2. Restart Router

3. Unplug Apple TV from Power for 2-3 minutes – re-plug in and retest.

djskerry

Level 1

4 points

Nov 15, 2020 3:11 PM in response to Farp96

Im having the same problem. Only happens when using Apple TV. I also have an LG CX 65.

Nov 15, 2020 7:13 PM in response to djskerry

Try unplugging. Switching off power strip works for me.

newoski

Level 1

13 points

Dec 5, 2020 6:54 AM in response to aidanbiggins

Official LG workaround and long-term solve update

https://lgcommunity.us.com/discussion/comment/25073#Comment_25073

zyzzyz

Level 1

12 points

Dec 13, 2020 12:36 PM in response to MJOSCAR

Thank you. That’s good to know. Did the technician have to swap out your TV’s motherboard for this issue or this should be able to be resolved with the next LG update?

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New LG CX OLED Audio skipping