[Dixielandjazz] CD question

[Richard Broadie]

This is a common solution for CDs that won't play on some of your equipment.
(burning copies from unplayable original)  I've gone so far as to fix my
kids CD based video games years ago by burning copies that played where the
originals won't.  I suspect currrent copy guard developments would block me
from such activities today, especially as related to the games.  Dick B-
----- Original Message ----- 
From: "John Farrell" <stridepiano at tesco.net>
To: <dixielandjazz at ml.islandnet.com>; <Andy.Ling at Quantel.Com>
Sent: Friday, September 12, 2003 7:17 AM
Subject: [Dixielandjazz] CD question


> Yesterday a Swiss friend sent me two jazz piano CDRs which he had burned
for
> me, both were the same brand. One plays fine on my hifi, the other
doesn't -
> yet it plays perfectly on my PC. I solved the problem by burning a new
copy
> of the refusenik - my copy plays normally on the hifi.
>
> This is weird stuff.
>
> John Farrell
> http://homepages.tesco.net/~stridepiano/midifiles.htm
>
> ----- Original Message -----
> From: <Andy.Ling at Quantel.Com>
> To: <dixielandjazz at ml.islandnet.com>
> Sent: Friday, September 12, 2003 10:06 AM
> Subject: Re: [Dixielandjazz] Fw: CD question
>
>
> > Bob Romans asks :-
> > > Have you ever had someone tell you that your cd's would
> > > not play in the cd player?
> >
> > There are several reasons for this. The CD is read by shining
> > a laser at it and looking for the reflections.
> >
> > Originally CDs had a nice shiny silver surface with small
> > indentations for the "digital" bits. The difference between
> > these two areas was large and so was "easy" to see.
> >
> > When writable CDs came along the colour was changed. Some
> > were gold, some green, some even still silver. Also the
> > indentations became holes burnt by the write process. All
> > this made it more difficult to read and sometimes a more powerful
> > laser was needed. Most CD players could cope, but some didn't
> >
> > Then along came re-writables. These use a different technique
> > again which makes it even more difficult to read. The upshot
> > of this was that most audio CD players couldn't read them.
> >
> > Newer CD players are now designed to cope with CD-Rs and CD-RWs
> >
> > Another factor is that the laser slowly degrades. As it gets
> > older it loses its brightness. I have a CD player which is
> > 1983 vintage. It stopped playing some CDs. When this first
> > happened, a tweak of a "brightness" control fixed it. The next
> > time it needed a new laser. It now needs another laser and
> > has been retired.
> >
> > DVDs pack the data in tighter. To do this they need a smaller
> > beam of light to do the reading (amongst other things). This
> > is partly achieved by using a different colour laser. A CD
> > player will not even come close to reading a DVD.
> >
> > If you are producing CDs for others, then commercial pressings
> > will work for 99.9% of people, but obviously have a high
> > initial cost. CD-Rs will work for most and are cheapest for
> > low volume production. CD-RWs should only be used if you
> > really do need to make changes. Even then it is probably
> > easier to just create a new CD-R
> >
> >
> > Andy Ling
> >
> > _______________________________________________
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> >
>
>
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