Thanks, Andrew, that is helpful. I agree with you, the fact that you cannot tell the difference on your good equipment probably means that it is finally lossless. Do you remember what your streamer was showing previously?
This has been a problem for a lot of people for a while. A reasonably good equipment could pick up the difference between AAC and lossless.
I don't really recall when it changed. A few months ago, I think. When I first got the CXN V2, it reported AAC 256. I was using an old Ipad wired to it for a while for Hi-Res. But, that was a bit of a hassle, and my daughter needed the Ipad, so I went back to AirPlay 2, and it was reporting CD quality. October, perhaps?
I definitely don't wish to open this can of worms, but I have to admit that I side with the skeptics about whether we truly can tell the difference. My feeling has always been that I will try to play the best quality source I can, without making myself crazy about the whole thing.