Idea: The ultimate CD/DVD auditing tool (meow)

Tyler Durden camera_lumina at hotmail.com
Wed Jul 9 18:03:51 PDT 2003


Somebody wrote...

>Yes this is for localization ---clicks are broadband, you need to
>identify which freq components are used.  I still think
>humans can't discriminate the phase of a tone.

An interesting thing to try is to play with the "phase" button on many 
high-end gear. This supposedly matters for low frequencies, but despite my 
unarguably golden ears, I'm still not convinced I can hear the difference.

My Thiel speakers, however, claim to be "phase coherent", and that seems to 
be an entirely different matter. In other words, the different frequency 
components of a sound are transmitted in correct phase relationships (ie, 
true to the original sound), and the result is a (sometimes) astonishing 
level of spacial detail. Of course, non-audiophiles will poo-poo that claim, 
but even they will hear that the Thiels are far more accurate than the crap 
that's sold in Circuit City or whatever. So I figure I may as well believe 
Jim Thiel's claim that phase coherence is important in a speaker.

-TD


>From: Mike Rosing <eresrch at eskimo.com>
>To: "cypherpunks at lne.com" <cypherpunks at lne.com>
>Subject: Re: Idea: The ultimate CD/DVD auditing tool (meow)
>Date: Wed, 9 Jul 2003 14:32:53 -0700 (PDT)
>
>On Wed, 9 Jul 2003, Major Variola (ret) wrote:
>
> > Yes this is for localization ---clicks are broadband, you need to
> > identify which freq components are used.  I still think
> > humans can't discriminate the phase of a tone.  In fact, MP3s
> > use this to cut bits.
>
>They can tell relative phase, but it takes a lot of training.
>
> > After the experiments, the cats
> > will be ok, as I assume they're sufficiently
> > plastic, unless you do brain staining on them.  :-(    Or your policy is
> > the
> > Tim McVeigh treatment.
>
>both.  They spend a year training the cats, then a year or 2 collecting
>data, then brain stain, then vaporize.  Each cat is worth about $1M when
>it's all done, and it's got a lot of skull missing while it's alive.
>But it's well protected with a lot of aluminum and epoxy :-)
>
> > Cool stuff, though my domestic feline wants to know where you live.
> >
> > PS: have you identified the "can opener sound" brain-center yet?
>
>I think you better keep it far away!  And no, they don't play with
>higher order systems.  The low level stuff is hard enough!!
>
> > Cats manage biometrics and reputation better than most human systems..
>
>:-)
>
>Patience, persistence, truth,
>Dr. mike

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