Kevin,

Yes, of course it was you who enabled me to fine tune my CDex settings, for 
which help I thank you again.  And thanks for your clear and informative 
explanations here, as well.

that said, I understand better now your preference for being cautious with 
ripping.  But in order to get a sample of what had happened with a disc I 
ripped to .mp3 just yesterday, after setting CDex back to its default on the 
fly mode, I stuck that CD into the drive again, launched CDex and used the 
Jaws cursor to read the full length of the information beside each track. 
And every track of the 16 said Okay at the end of the line (I know it isn't 
a "line," but that's how I'm perceiving the layout with Jaws).

So that one went okay, for instance.  and when I used to rip on the fly 
before taking the precaution you recommended, I never produced .mp3 tracks 
with any pops or clicks or other audible faults.

On the other hand, maybe you can explain this:  As I listen to Jaws read the 
info that tracks the ripping process, after it reaches 100 per cent of a 
track, I always hear, as the last utterance before I hear 5 per cent as the 
ripping of the next track gets underway, "jitter."  It says this every 
track, at the end of ripping it.  I've always wondered what that meant, but 
now that you say it indicates a flaw in the disc or maybe in the recording 
process, I don't get it.  My ripping turns out faultless, as I've said.  So 
why am I hearing"jitter" reported at the end of each track while ripping it?

I have one more question, this time about burning as opposed to ripping. 
You wrote:


With regards to burning on the fly, well, the same applies in terms of the
possible impact on the final product but there is another danger here.  If
you're burning on the fly, again you're taking a direct data stream from
your CD-ROM and passing it straight to your rewriter.  If there is a read
error on the source CD and you're burning, the burn could actually fail and
then you are going to end up with a CD that cannot be played and is good
only for using as a coaster or tying together with other ruined CD's and
Robbie Williams CD's to scare birds from your vegetable plot in the garden.

I'm not sure what you mean, here.  When I say "burning," I'm  talking about 
creating a CD from .mp3 files that are on my computer, and which I usually 
know to be playable and listenable.  So I don't understand why you again 
cite the critical importance of considering both the condition of the 
original CD and the error correction capabilities of the CD ROM drive. 
Maybe you thought that when I spoke of burning, I was talking about copying 
a CD?  I wasn't, in this case.

Hope that's more clear.  And thanks again for your explanation.  I may 
experiment a little with returning to your cautious method and jacking up 
the priority level a bit, to see if that would make it less frustrating to 
use the imaging method.  But mainly, I appreciate your giving me such a 
clear idea of the things to be watchful for, and the alternatives for 
ripping.

Daniel


----- Original Message ----- 
From: "Kevin Lloyd" <[EMAIL PROTECTED]>
To: "PC audio discussion list. " <[email protected]>
Sent: Saturday, May 28, 2005 6:52 AM
Subject: Re: On the fly ripping and burning


Hi Daniel.

I think it was myself that you'd probably referred to below as recommending
that one should rip with "on the fly" unchecked.  You've asked a few
questions below so I'll try to answer them as best I can.

Firstly, the speed at which you rip can be changed in the CDEX settings so
it may be worth trying this first before you decide to do anything
differently.  The thread priority setting has 5 or 6 values that vary from
below normal to fastest.  There's a balance to be had here as if you rip at
the fastest speed you may find that you can't use your computer effectively
while ripping because it's taken so much resource.

With regards to using "on the fly" in general, this really refers to
processing a direct data stream right from your CD-ROM rather than
extracting data first and then processing it when it's been safely read and
stored on your hard drive.

When ripping on the fly, it is possible that you will find slight
imperfections with the finished product usually manifesting itself in pops
and crackles.  This is generally as a result of jitter but could be just
down to the process of extractign and converting a direct data stream.

If you've used CDEX you may have seen on the list of tracks that there's a
right hand column called status.  This can have 3 different values:
dash meaning that the track has not yet been ripped.
OK meaning that the track was ripped with no jitter errors.
X followed by a number meaning that there were a number of jitter errors
found; the number representing the number of errors in the track in total.

These values are retained by CDEX so even if you haven't noticed them
before, you can put in a CD that you've ripped previously and see the status
results.

The reason why I mention this is that I too take great care of my CD's but I
have been surprised by jitter errors when ripping my CD's.  Some I've been
able to remove by cleaning the CD with a special CD cleaning cloth but
others I've been unable to remove.  The number of jitter errors generally
dictate how noticeable the errors will be to you.

A standalone CD player usually is far better built than a CD-ROM and in
general have far better error correction capabilities.  So, if you put your
CD in your standard player you might not notice jitter errors because of
this error correction and the quality of the transport build.

With regards to burning on the fly, well, the same applies in terms of the
possible impact on the final product but there is another danger here.  If
you're burning on the fly, again you're taking a direct data stream from
your CD-ROM and passing it straight to your rewriter.  If there is a read
error on the source CD and you're burning, the burn could actually fail and
then you are going to end up with a CD that cannot be played and is good
only for using as a coaster or tying together with other ruined CD's and
Robbie Williams CD's to scare birds from your vegetable plot in the garden.

Like most things, personal preferences dictate whether you  will use "on the
fly" or not but I see it as a guarantee that is worth a little extra time on
that rip or burn.

Hope this helps.

Regards.
Kevin
E-mail:  [EMAIL PROTECTED]
----- Original Message ----- 
From: "Yardbird" <[EMAIL PROTECTED]>
To: "PC-Audio" <[email protected]>
Sent: Friday, May 27, 2005 11:36 PM
Subject: On the fly ripping and burning


> Lately, I've been downloading and exploring a number of programs for
> ripping, burning and copying music.  And one thing I've noticed while
> reading the documentation for these applications.  That's that they don't
> all agree with, who was it, I think Keith, who in the course of describing
> how to best configure the ripping settings in CDex, said that on the fly
> ripping was to be avoided in favor of the slower method of writing a file
> (or "image," or whatever is right to say; I've seen it put both ways now).
> as I understand it, this is so that if there's some sort of flaw in the
> material being ripped, then the program will catch it and somehow rectify
> the error prior to writing the track to disk.  I think that's the idea,
> right?
>
> Well, in at least one of the programs I've been trying-- I think it's the
> Easy CD-DA Extractor that everyone's been speaking highly of, the
developer
> himself, in the instructions, recommends the on-the-fly method,
explicitly,
> as he explains how to set everything for optimal ripping quality.
>
> A moment ago, I used CDex to rip all the tracks from a CD to disk, and was
> reminded as I waited, and waited, and waited, just how much extra time the
> slower method required.  I could enjoy having this procedure go faster.
>
> What I'd like to know is, just what sorts of errors are supposed to be
> avoided by using the slower method, and where in the sequence are those
> errors expected to come from?  I mean, if it's in case your CD is faulty
in
> some way, then I'm going to just set it for on the fly.  Because I know
the
> condition of most of my music CDs, and have little reason to suspect that
> CDex is likely to be ripping faulty tracks to disk without my knowing that
> there's something wrong with that CD.
>
> Any advice Any ideas on this?  Am I not understanding that it's common in
> this ripping procedure for CDs to be corrupted or damaged in ways you
can't
> know if you've only been hearing it on your stereo or computer?  Or are
> flaws and errors introduced at some other stage that I don't understand
> about?
>
> Thanks.  I'd love to speed the process up.
>
> And if anyone can speak to the same idea in relation to *burning* CDs,
this,
> too, would interest me.
> Thanks,
> Daniel
>
>
>
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