Playing surround sound via opus from Shield
I'm trying an experiment by compressing my movies' surround audio to opus because of its superior compression efficiency. I'm playing movies from an external hard drive connected to my Shield Pro by hdmi to my Denon. Since the Avr doesn't decode opus itself, I'm pretty sure the decoding is happening at the Shield level by decoding to pcm before sending the signal on to the avr. Then the avr, instead of displaying "truehd," "DTS" or "DD+" etc. as with normal movie audio codecs the avr typically recognizes, it's displaying "M In+DDS."
I...think...the end result is the same? But the whole thing is kind of confusing, and I can't be sure if this is a bad idea.
Yes, all roads lead to pcm before sound can go to the speakers. And for the record, bitrate isn't an issue. I've given my opus compression a paranoid amount of headroom to work with, so my concern is really with how the different devices decode the signals and how, if at all, that affects the surround sound behavior.
Edit: I don't have atmos/object-based sound setup. I only have 5.1 with an avr with no dtsx option, so stripping that metadata is irrelevant.