[bob]

On Jul 13, 7:19*pm, Norman Schwartz wrote:

Some listeners, including myself, feel that a period of longer term
listening (at least several hours) is required to reveal itself. E.g.,
could it possibly be that certain distortion characteristics are not
apparent nor find oportunity to 'grate' during instantaneous type
comparisons?

Anything is possible, However, all of the evidence we have says that
just the opposite is true—that any distortion becomes harder to detect
as the time interval between hearing the distorted and undistorted
signals increases. "Longer-term listening" will decrease your
sensitivity to differences, not increase it.

bob