@rudyb - Thank you for sharing the link of the NPR site. Great web link they have created for listening test. I listen using my headphone (as always recommended for this purpose, good one) and, I got to admit, I could hardly discern the differences. Maybe my ears need to be tuned / trained. I had similar experience in listening with the compressed files such as AAC streamed from Youtube against the hi-rez. flac 16/44.1, 24/96 or even 24/192 files.
I understood you are just sharing / exchanging the information in this platform. Appreciated. Don't be intimidated with or bothered / discouraged by some unkind words. We could agree to disagree while keeping good manners ...