Wow, thanks for the analysis--what tools did you use?
Just Audacity and Excel but I am not convinced the differences I found would be big enough themselves to be audible, certainly although there was clipping it was only on a few samples, I was able to configure FooBar to allow me to ABX (ABX is just what FooBar calls DBT, DBT is short for Double Blind test, in a double blind test neither the experimenter nor the subject knows which stimulus is which, this stops the experimenter accidentally communicating the identity of samples, with FooBar the software takes the place of the experimenter.
Anyway I was unable to ABX the files in FooBar, however I don't know if the FooBar ABX comparator plays each file at its native bit-depth/sampling rate or whether it resamples. I set FooBar up to output a digital output to a DAC which supposedly can decode 24/192 - assuming it correctly output each one as it was encoded I failed miserably...
I don't think I have hearing over 20 kHz--when I run my own tests or use the various files online it disappears for sure around 18kHz at best.
No one has replicated my results (sorry, what's DBTS?), at least that I know of.
If you looked through the thread, I've passed the ABX under quite a few conditions now, and on two completely different platforms.