I think if you look into Davids background being the founder of DBX you will find his ethics to be without question, rather he fairly examples what he knows
and has contributed engineering to.
https://earthworksaudio.com/wp-conte...yond-20kHz.pdf
What is needed is a rethink of the CD standard and accompanying equipment replaying CD's to lift the available frequency.
20-20kz is safe, predictable and great for manufacturers, but not for high fidelity audio. We need to realize we are being short changed.
Nyquist sampling simply determines that the sampling occur at twice the upper frequency limit, its mathematics places no apparent restriction.
Things would be much better had the upper frequency originally designed to be 44.1khz and therefore the sampling to be at 88.2khz, but thinking like this got in the way
http://www.indiana.edu/~emusic/etext...er5_rate.shtml
" Rumor has it that video equipment already had clocks that ran at 44.1K that could be integrated into the first CD players. I have also heard that Herbert von Karajan complained
to Sony that Beethoven's 9th would not fit on the early CD specifications. By lowering the rate to 44.1K, 74 minutes could be recorded onto a CD using 16-bit samples, enough to do the trick."
Now to find other equipment following this same mediocrity path by providing 20-20khz or OMG less, is not good for the future of high fidelity
Here in comparison we see the Denon DL103 cartridge providing 20hz to 45khz
https://en.wikipedia.org/wiki/Denon_dl103