Okay, I'm impressed and will apply some back pedaling here on having
implied that the Zenph clip is a possible hoax.

My complaint is that it is very, very vague as to how the sound is
being extracted from the recordings and further processed.  It is not
at all clear as to how much is done by computer and how much by manual
editing.  In making up my mind about its veracity it did not help
reduce my doubt that the two Rachmaninoff clips played are available on
Ampico.  This sort of situation recalls the style of a snake oil
salesman.

The Glenn Gould performance is indeed outstanding.

Jim Heyworth,
Sechelt, British Columbia, Canada