On 2/3/2012 9:43 AM, dpb wrote:

At human-audible frequencies, there simply isn't any signal distortion
of a measurable magnitude that could be discerned audibly.

Ahh, but "human audible" frequencies are only part of the story.

It is well known that _third order harmonics_, well above "human
audible" frequencies, do color the sound within the human audible
frequencies.

AAMOF, a trained listener, like a recording engineer, relies on these
third order harmonics to make a distinction between good sound and
excellent sound.

(It's one of the reasons why us old fart recording engineers, like Bruce
Swedien who did most of Michael Jackson's and Barbara Streisand's work,
among others, can still record and mix with the best at an advanced age.


.... that is, we could before the Nyquist frequency limits of digital
sampling rates robbed us of anything above half the sampling frequency.

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