FYI: If you are only getting 2.0 channel audio via the HDMI in of the Realiser, PLEASE READ (or skip to the Conclusion below):
I was with Lorr doing a PRIR measurement/demo of the Realiser.
We tried using an Oppo 83 as a source, but no matter what we did, it would only output 2.0 audio via HDMI into the Realiser.
We then tried my Panasonic BDT320 as a source and that worked. It was outputting 7.1 to the Realiser.
Then all of a sudden, it would only output 2.0 channel audio. Even Lorr could not figure out why. He then brought his Realiser in and hooked it up and it was getting 7.1 audio from the same source, but my Realiser would only get 2.0 audio.
Before Lorr was ready to swap mine out as defective, we realized that it was the projector connected to the HDMI out/pass through that was requesting 2.0 audio via HDMI.
Then once the HDMI board in the Realiser was set to request 2.0 audio, it would only request 2.0 audio even AFTER disconnecting the projector.
The only way to "reset" the HDMI port on the Realiser to request multi channel audio was to connect the HDMI out to a device that would request multi channel audio. In this case, we connected the HDMI out to a surround sound preamp/processor which would definitely request multi channel audio.
Just by connecting the surround pre/pro to the HDMI output, that "reset" the Realiser's HDMI board so that it would request multi-channel audio from that point on.
If you are only getting 2.0 channel audio via HDMI in the Realiser, try connecting the Realiser HDMI output to a device that supports multi-channel HDMI audio like a surround Preamp/Processor/Receiver.
Of course, some devices will not output multi-channel LPCM audio via HDMI, so in that case nothing you do will "fix" the problem.