What's the use of a 192 kHz sample rate?
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From: Jerry Avins on 7 May 2008 13:48 rajesh wrote: > On May 6, 2:54 am, "geoff" <ge...(a)nospam-paf.co.nz> wrote: >> rajesh wrote: >> >>> Mr Pearce please view my profile and read some of my posts. >> What is "view my profile" ? >> >> Oh, I see, you think you are posting in some Google group. Guess what - you >> are not. you are posting out into a newsgroup in the real world, albeit >> through a google 'portal'. >> >> Most of us here are accessing USENET directly, and 'profiles' do not exist. >> They area Google Groups things only. >> >> geoff > > geoff, > how can i access usenet directly? what is the url for that. My access to usenet is through my internet provider, using the same program that I use for email. There are for-a-fee providers like usenet.net, giganews.com, newshosting.com, .... Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
From: Steven Sullivan on 7 May 2008 13:52 In rec.audio.tech rickman <gnuarm(a)gmail.com> wrote: > On May 3, 8:22 am, nos...(a)nospam.com (Don Pearce) wrote: > > On Sat, 3 May 2008 05:11:53 -0700 (PDT), rickman <gnu...(a)gmail.com> > > wrote: > > > > >On May 3, 3:28 am, Randy Yates <ya...(a)ieee.org> wrote: > > >> rickman <gnu...(a)gmail.com> writes: > > >> > If it really is a waste of time and money to use 192 kHz ADC and DAC, > > >> > why do you think they would do it? > > > > >> Greed. They think that the general public is dumb enough to buy into > > >> the lie that they really need such a system and would then spend lots of > > >> money repurchasing what they already have. > > > > >I'm curious, how do you know what unnamed people are thinking? My > > >understanding is that regardless of what frequencies acoustic testing > > >says that people can hear, audiophiles can hear the difference between > > >many of these "wasteful" features and otherwise adequate audio > > >systems. > > > > Utter nonsense - unless of course you can cite some proper tests. > And what do you base this statement on? I don't have any "proper" > studies. I am referring to a conversation with a friend who worked in > the field. Not nearly good enough. > You can poo-poo this sort of evaluation. But that doesn't make you > right. Do you have any "proof" that no one can hear the difference? > Do you even know what the differences are that I was talking about? You can't prove negatives to 100% empirical certaintly. You can determine likelihoods, and that's what science is really about -- finding the models of reality that are most likely to be accurate. It seems extremely likely, for example, that no one can actually *hear* frequencies above the mid-20 kHz. They can be perceived via bone conduction, if the signal is generated right at the skin surface. -- -S maybe they wanna rock. maybe they need to rock. Maybe it's for the money? But That's none of our business..our business as fans is to rock with them.
From: Steven Sullivan on 7 May 2008 13:54
In rec.audio.tech robert bristow-johnson <rbj(a)audioimagination.com> wrote: > On May 3, 4:58 pm, Ken <ke...(a)telia.com> wrote: > > On Sat, 3 May 2008 13:36:10 -0700 (PDT), robert bristow-johnson > > > > <r...(a)audioimagination.com> wrote: > > > but we can't hear anything above 20 kHz. even with percussive sounds > > > with sharp attacks. and if we cannot hear anything above 20 kHz, then > > > 40.0001 kHz sampling rate can store all of the information we need. > > > for practical reconstruction purposes, 44.1 and 48 kHz are sufficient. > > > > No. When I was 35 years I could hear up to 24 kHz. > > Now I'm 54 years and can easy hear 19 kHz (haven't tested higher). > well, good for you. still would like to see how you would do in such > a blind test. > r b-j Hearing into the mid-20's is not unknown. It's just extremely rare beyond childhood. -- -S maybe they wanna rock. maybe they need to rock. Maybe it's for the money? But That's none of our business..our business as fans is to rock with them. |