Mike Rivers wrote:
Jay Ts wrote:
I disagree with all of that.
Is that all you have to say on the subject?
Yes. Sorry, Mike, but I don't have much time lately, and I'm
trying to develop the ability to avoid extended, involved
discussions on usenet.
I do remember some discussion about a "wave file from hell,"
Thanks for the link to the discussion. Now I remember it. Your waveform
links are all dead, so I couldn't see what you were talking about, but I
remember thinking when I was browsing it (I usually lose interest in a
thread pretty fast when it becomes an argument between two people) that
this Waveform from Hell was a contrived demonstration of a well known
issue with D/A converters. One can learn two valuable lessons from it.
I was thinking that too, but people showed that it doesn't take
a "Wave From Hell" to result in a problem. The WFH is a contrived
wave that shows how bad it can get, at about the worst.
I did remove the scope trace photos from my website some months
ago when I was cleaning things up on the server. If it is really
important for you, let me know and maybe I can email them to you.
One is that inter-sample overload can occur, and the other is how to
avoid it.
So I stand my my statement that the "problem" is fully within the
control of the user. Just set the level correctly and everything will be
fine.
It's arguable, and I don't want to get into it.
At the least, I'd like to have confidence that my audio card
is designed so that this problem will never show up. I don't
think that is asking too much.
I know how hard it is to design hardware, software, or
any combination of them that is "perfect", but the problem
is that imperfections (bugs or design failures) in complicated
systems such as computer systems can lead to huge problems for people.
Lately I've been using my Audiophile 2496 mostly as a test instrument,
creating and analyzing things like full-scale sine waves or
square waves as part of designing circuits for the audio/music
market. I have to remember about the WFH (intersample) issue.
It's not always allowable to "just turn it down", because I need
to test things at 0 dbFS.
In any case, I think people should not need to analyze,
understand, and correct for odd behaviors of their "professional"
quality audio cards. As I said in the original thread, my pocket
computer, a Palm Tungsten E (not even their top of the line model)
was able to handle the waveform correctly!
Jay Ts