Settings for Atmos

Hi Guys,

I have some atmos test files downloaded and was hoping to test them out.

When I play them on the Shield they show up as TrueHD 7.1.

Once I play them on my Marantz 7009 the receiver says they are "Multi In + DDS".

But I see no option for Atmos like I do when I play a Bluray disk.

So do I need to tweak a setting here? Shouldnt the receiver also recognize these test files as Atmos instead of "multi in + DDS"?

Thanks for any suggestions,

Glenn