Originally Posted by Madmax67
No problem. Bottom line regardless of what any other year model receiver displays if you are not using any of the receivers built in upmixers and are getting sound through all of your speakers including any height, in ceiling or up firing speakers then you are getting Dolby Atmos albeit in a PCM signal which does explain why your specific receiver is showing it as multi in.
Dolby Atmos in Dolby Atmos MAT
Certain content devices, such as Xbox One X/S and Apple TV 4K, come with a Dolby Atmos MAT encoder, which is designed to encode, decode and incorporate Dolby Atmos metadata into lossless pulse-code modulation (PCM) audio. When a sound system receives this audio format, it will recognize it as Dolby Atmos MAT and process the multi-channel PCM audio with the embedded Dolby Atmos information, allowing listeners to experience Dolby Atmos even in PCM audio.
I've also been driven mad by the Multi-In/Atmos issue on Xbox One X, but decided to mail Denon customer support, who are aware of the issue. Here's what they told me.
"Thank you for your query.
"We are sorry to hear that you are experiencing difficulties.
"Our engineers have thoroughly investigated the issue with Dolby Atmos and Xbox and the findings are as follows:
"1. Dolby Atmos version is changed from “Dolby Harmony 1.3” to “Dolby Home Audio 1.6” via U21 Update. The Dolby Home Audio 1.6 includes the “Dolby MAT signaling” feature that detects the channel based PCM signal contained into the Dolby MAT Container. And, major player which contains the PCM signal into Dolby MAT container is only XBOX One S and XBOX One X, currently. With new Dolby Atmos version 1.6, specific processing of source (XBOX) is needed. This is now the problem: Xbox did not implement this processing yet.
"2. With downgrading the FW to previous version, Dolby Harmony 1.3 will be installed again. “Dolby MAT signaling” is unknown in this Dolby version, so problem cannot occur. Problem will only occur when playing Dolby Atmos film via Netflix App on Xbox. Playing BD´s via player in Xbox: no problem"
However, they sent me the old firmware for the X2600 by mistake. Doing the downgrade did not work, so I wrote back. This morning they sent this:
"Thank you for your patience.
"Please accept our sincere apologies for the error. We are currently waiting to receive the right firmware, which is being amended to address the Dolby Atmos issue. Once we have received this, an email will be sent to you with the correct firmware and instructions."
In summary, sit tight. They're on it.