4k audio

No response as of yet. Here are the two photos.

I am getting sound from all speakers, and subwoofers. Any idea as to what type of surround decoding is used when the signal is PCM 5.1 only? I assume Atmos/PCM is Dolby Digital. 

Ok, thanks for all your help. 

So I see we all took different foreign language classes, haha. Thanks for explaining that so well, @BIslander. @user_x1npns, are we alright to share this information with the backend team and get the ticket that was created closed out? 

It’s fine with me. Although they may still want to work on the fact that when you put the box in “expert” mode, the 4K channels still are only being broadcast in PCM 2.0, which I don’t think is what would be expected. In  “expert“ mode the standard channels are being broadcast in Dolby Digital+, which is what I expected and what I believe is correct.

@user_x1npns will do! I also put the specific asks @BIslander had as well on the ticket for the back end team, to try and get as much detail as possible. Thank you for your time working with our Xfinity Forum support team so far, as soon as I get a reply I'll follow back up with you here. 

Hi, there! @user_x1npns @BIslander,Thank you for your patience while we worked with our backend team. I understand you were looking for more detailed information regarding the audio processing differences between the Xi6 and XG1v4. We followed up on your behalf and received an update. Unfortunately, the team does not have visibility into the specific audio codec processing or output behavior of the Xi6, so they are unable to confirm whether 4K channels are using AC-4 versus DD+, whether Dolby MAT is being used, or why Expert mode is outputting 2.0 PCM. The only information available to them remotely is the HDMI Audio Output setting shown in the device settings menu, as reflected in the screenshot below. They do not have access to additional diagnostics that would answer the specific audio questions you've raised. I wanted to share the update we received and be transparent about the limitations of what our team can see from their end. How does this sound so far?

My apologies for the limited details on the audio processing abilities of these devices, @BIslander. It seems like our backend team was not able to find those details through any of their resources, at least nothing that could be confirmed specifically, so they shared what they had from the HDMI Audio Output settings. The ticket that was attached to our interaction with @user_x1npns is still open, so I will update the thread if any new details or insights are added.

Part of the problem with that screenshot is they took a screenshot of the device in my kitchen, not in my media room. I have three devices. One in the kitchen, one in the main bedroom, and one in the media room. The devices in the kitchen and the main bedroom are set up for stereo output. As that screenshot shows for the kitchen. It’s the one in the media room that is causing the questions that we’ve been asking. Currently that one is set up for Auto HDMI output.

But I don’t believe any screenshots of my devices are gonna answer the questions that we have been asking. 

@user_x1npns I appreciate the additional information of the screenshot info not being associated with the correct box. The ECM ticket is still open, so did ask relay this to the advanced support team who is assigned to the request. 

@BIslander I'm limited to the information provided by the support experts I'm currently working with. But when following up on the update I send over, I did ask if there is another team that they can point me in the right direction to get the answer. 

I'll monitor for the next update, and make sure to keep you both in the loop here. 

@BIslander We got a follow up from our support team and let us know they would need to get an engineer ticket open as they will need some specific information and screenshots if possible. That information will be best gathered in DMs so if you could please send us your first and last name along with your full-service address we can get started on that ticket. 

@user_x1npns Those questions are waiting for you om the DM space

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I'll send the DM, but I have an XG1v4.  The problem is with the Xi6.  

@BIslander, no worries. The XI6 supports Stereo, Auto Detect or Expert mode if you were looking to change the HDMI Audio settings. 

Sure thing, @XfinityFrank. Updates will come as the OP's ticket is worked on. Thanks. 

I have been asked a couple of questions about my set up, which I had previously explained. But nothing new to report.