So many of these posts aren't specifying the exact compression format / bitrate they used for the test though. It's obviously possible to pass at some level of

So many of these posts aren't specifying the exact compression format / bitrate they used for the test though. It's obviously possible to pass at some level of compression, but what I really want to know is if anyone can pass a double blind test at a high bitrate on a modern codec vs uncompressed. The codecs obviously represent human-audible information much more efficiently than raw PCM samples. I'm not sure why the quality couldn't scale up (by increasing the bitrate) until it surpasses 100% of human hearing limits (since there's a lot of headroom to increase the bitrate and still be smaller than uncompressed). Maybe some formats have hard-coded frequency cutoffs (that don't change with the bitrate) that are too low for 1% of the population, but there's enough format choice that it would be surprising if they all had that problem.