Audio Delay - Bitstream & Atmos using LG77C1OLED and LGSN11RG

for audio settings I have hdmi audio as bitstream out and bitstream format as dolby atmos. The sound bar I have is sony top of line unit.

If your receiver doesnt support Atmos you should stick with 5.1 and enjoy of Dolby. You need a better receiver or soundbar to use Atmos (with atmos is better using bitstream), bitstream with Dolby or DTS the audio will get a bit lossy.

For a better you can see this
topic in Xbox Reddit.

You can't use Atmos w/o bitstream - interesting why you came up with your conclusion though.

If your receiver doesnt support Atmos you should stick with 5.1 and enjoy of Dolby. You need a better receiver or soundbar to use Atmos (with atmos is better using bitstream), bitstream with Dolby or DTS the audio will get a bit lossy.

For a better you can see this
topic in Xbox Reddit.

Hi bladerunnin,

Thank you for posting on the Xbox Forums.

The reason you need to unplug the base station if you want to use Dolby Atmos for Home Theater is in the way the Dolby Atmos sound format is processed within the Xbox and Dolby Digital 7.1 in the A50's and DTS 7.1 in the TB 800X respectively.

The Dolby Atmos sound format for Home Theater on any platform is processed in the device itself through HDMI, in this case the Xbox's operating system and software. The Xbox will decode the audio in a bitstream format through HDMI for Dolby Atmos HT. The
headset base stations (not the Xbox) process and decode the audio formats and then send the data to the Xbox in bitstream through optical. Since everything is processed through the base stations for the headsets, simply turning off the headset won't remove
the base station as a device that is hooked up and recognized by the console, at least while the audio settings in the Xbox are still set for Optical audio: Bitstream out. That may be why you are getting the message that Dolby Atmos is only supported over
HDMI.

Under Speaker audio in the Audio output settings of the Xbox, try turning off Optical audio while leaving HDMI audio on Bitstream out, then under Bitstream format select Dolby Atmos for HT. When wanting to use the headsets, turn off HDMI audio and then put
Optical audio on Bitstream out, then under the format choose Dolby Digital (Astro A50) or DTS Surround (TB Elite 800X). If you have tried that but still can't enable Dolby Atmos while you have everything plugged in, then just disconnect the optical cable but
leave the USB plugged in, which is what charges the headset, not the optical cable.

Hi Jasmine,

I have noticed that as soon as I choose bitstream out (Speaker audio) and then it shows HDMI audio bitstream out, when I move down to choose Bitstream format, there is no sound when the cursor is moving to that selection box. After changing that box to select
Dolby Atmos for home theater (HDMI only), the no sound continues. Then going to the Dolby Atmos box on the main screen and try to demo one of the game clips, there is no sound during the playback regardless of which one I pick. I see no error message during
this process.

I do see a message during the Atmos demo if audio is set to 5.1 or 7.1 uncompressed and DTS digital surround sound. It says you're not experiencing Dolby Atmos but it continues to play the clip with video and audio.

I'm going to try switching the Samsung HDMI ARC cable once I receive the new one from Amazon. It's due to be delivered by 2/16 after being delayed from 2/12. I'll update my post once I change the cable.