I dont care what that email was about....
I just had to say that by far is the longest subject I've seen so far in a
email.
Yay, for one liner emails.
--icantelu
----- Original Message -----
From: "Gary Gilliland" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, July 01, 2001 3:11 PM
Subject: MD: Viewing square waves There is a trap in viewing a graphical
(analog) presentation of a mathematically-generated (digitally correct)
square wave, and that is that any display scheme that is not square
wave-aware will distort it at least somewhat.
>
> The Send waveform in Cool Edt from a few threads ago, for example,
showed ringing that is not present in a mathematically-perfect square wave.
But the square wave-aware displays I know of simply draw a square wave when
the input sufficiently resembles one, thus not necessarily displaying the
true wave shape either. There are almost-square waves that will fool most
of them, and certain steganographic techniques that depend on producing
"almost" wave shapes, square and other, to keep things interesting.
>
>
> To examine a perfect digital-domain square wave critically, it is (or at
least used to be) necessary to use a digital-domain presentation. The
simplest, most readily available tool for this was usually a binary editor,
but audio data files are so big they often choke (or at least challenge)
available computer resources in opening an editing session.
>
> Hex.c is a simple-minded program I cobbled together seven years ago to
work somewhat like Unix's Head, since I only wanted to look at -- not
alter -- the data values, and not a great many of them at that. I will make
the source and/or an MSDOS executable available to anyone who would like it.
>
> Gary
>
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