Please elaborate on this feature. It doesn't sound quite right as no AVR can change an incoming signal. What is the content info, source device and output settings and the Denon's selected sound mode?
It's a streaming Atmos/DD+ soundtrack. DD+ EX with flag set, is in the Pacific Rim: Uprising soundtrack. I bought the Digital Movie from the VUDU app. The Denon info screen told me all of this through it's screen in the setup menu.
You have the option to listen to DD+ sound mode or Atmos/Dsurround sound mode. Obviously Atmos sound mode plays the atmos soundtrack but DD+ sound mode retrieves the DD+ 5.1 EX soundtrack inbedded in the Atmos Soundtrack. This imbedded DD+ 5.1 EX soundtrack is what my Denon AVR-2312ci would use since it's not Atmos compatible.
I think it's pretty cool I can choose which soundtrack to use although the Atmos would be the best with 7.1 support instead of an EX Matrix.
I also found out that DTS 5.1 is outputting 7.1 in straight DTS mode, just like the Onkyo. This is what I expected as since there is no more surround back speakers option, it obviously allows DTS to choose it's recommended surround rear channel option. I believe it's a matrixed channel, opposed to what neural X would do. HOWEVER, in Direct mode, you stick with only the 5.1 channel output with the surround rear speakers off. The Onkyo did the same thing.
The only thing the Onkyo did different with Dolby was flip surround speakers for surround rear speakers, which doesn't work the best in my setup. It would had been nice if Onkyo would had put an option in have surround channel info to the chosen surround speakers instead of forcing that info to go just to the surround back speakers.
Also the Denon Direct mode acts like a Direct mode where the Onkyo Direct mode still manipulated where the surround channel info was directed.
I'm really liking the Denon over the Onkyo and the $100 ($200 for me with discounts) more seems justified from all the confusion brought on by the Onkyo design and poor documentatioin.