Re: What's the use of a 192 kHz sample rate?

"rickman" <gnuarm@[EMAIL PROTECTED]
> wrote in message
news:96f46e02-0219-4e88-81de-9a3e15579e8e@[EMAIL PROTECTED]
> I never said that *anyone* can hear sounds above 20 kHz.

But I'm willing to agree that some people can do this, even in a blind
test. 
However, its not the question at hand.

> I said that there are people who can hear the difference
> between systems that use higher sample rates than 48 kHz.

I'm willing to agree that this can happen, but the explanations always
seem 
to have this annoying tendency to not be the same as the question at hand.

Just because a system uses a sample rate >= 48 kHz does not mean that it
is 
free of audible flaws.

The question at hand is whether or not introducing an ideal low pass
filter 
is audible when listening to music, and when that low pass filter has 
negligable effects below 20 kHz.

For example, a - 6 dB/octave filter with a - 3dB point at 20 kHz also
causes 
1 dB loss at 10 KHz, which some listeners can detect.


> The real issue is about the electronics and how they are
> measured *compared* to human hearing. Distortion is the
> real issue.  Filters introduce distortion and some people
> can hear the distortion produced by converters running at 48 kHz.

There are basically only two types of distortion - linear distortion and 
nonlinear distortion. Since you have not restricted your comment to 
nonlinear distortion, there is a possiblity that you are talking about 
nonlinear distortion, which is again not the question at hand.

> I suppose it is possible that my friend was mislead (and
> therefor myself).

Actually, it is for all known practical purposes, a certainty.

> I have no first hand knowledge of the
> sound tests.

Many of us do.

Please see www.pcabx.com .

>  But he is not a person to believe in rubbish.

Well, up until this question... ;-)

>  In fact, he is a person who is very intellectually critical.

Apparently, not critical and well-informed enough.

>  This is one of the few times he
> could not dismiss claims that run counter to the science.

That's his problem.