"Robert Casey" wrote in message
...
:
:
: The PROVEN, perceived sound quality of audio circuits with flat
response
: and inaudible levels of THD is "perfect sound". "Perfect sound " = no
: audible alteration in perceived sound when bypassed.

Pray, tell, how you equate perceived with proven--


: therefore THD is *not* indicative for the sound quality,
:
:
:
: ** Based on a false premise - hence a false conclusion.

the premise being what ?
:
: Maybe my ears are defective, but I find that:
: (close to 0% distortion) = best sound,
: A little 2nd harmonic up to -40dB down and no more than -50dB 3rd
: sounds pleasant,
: More than -50dB of 3rd = yuck.
:
and how did you establish that ? using a quasi-musical test signal
and analysing the distortion in that ? there is simply too much
going on, and much as some would like it, saying a model is
more true than reality is just nonsense.

: It -might- be more meaningful to compare amps by looking at specs
: specifying how much 2nd H, how much 3rd H, etc listed separately.
: An amp with say -40dB 2nd and -50dB 3rd is likely to sound
: better than one with -50dB 2nd and -40dB 3rd. But both will
: have the same THD spec (yes?).
:
still only marginal - please try to study perception in some depth
and maybe you'd see number games don't say much. Won't pursue
that any further, as it would probably lead to OT flaming by persons
who don't have a clue but do have a firm belief...

:
: But then, many a thousand pro-tube processing and mixing gear
: must be bought by fools... ?
:
:
: Maybe the issue is that tubes are said to permit larger transient sounds
: thru without
: hard clipping, vs op-amp designs. But that might not mean much as the
: recording
: device will likely clip that transient anyway.

Well, no maybe's there, NO opamp will even get close to 70 V rms
levels, for sure. What rec. device are you referring to, specifically ?

Happy speculating,
Rudy