@mahgister . Is there value in repeating the same arguments with just different wording? I posted a link that addresses this fourier limit that you raised. I am on holidays and it is too hot to be outside, so the rabbit hole was a good chance to cool off. The people in that link obviously know this topic very well. It turns out this was not an earth shattering discovery but something that was already known. This is not the forum for a long dissertation on sampling theory and fourier analysis, and I am probably too rusty for it, but some obvious flaws in your though process are evident, even one as simple as a song, recorded in digital has an analog filter to limit bandwidth and a window function to ensure it conforms to the requirement of Nyquist not unlike I am 100’s of other applications where similar processing is used and everything works just fine.
Appreciate you are trying to discover flaws in measurements, but a humble approach says that very smart people came up with these processes and they are unlikely to have missed, for many decades, obvious issues. If there is any consensus on higher bandwidth being audible? I can’t find it. Maybe I am wrong, but that seems to put a truck sized hole in an argument about "missed transients".
We can simplify it. It does not require a full dissertation that is above the heads of everyone here nor does it require a PhD. While down the rabbit hole, I discovered these experiments were done with basic audio DACs. Not only that, but I found someone did a similar experiment (fourier limit) and used MP3 files. If you can do the experiment with MP3 files, I think any claim you are trying to make is wrong.
I am climbing out of the rabbit hole, but I think this horse has been beat enough. It is dead and beyond reviving.