On Sunday 21 September 2003 04:45 am, Sharrea Day wrote:

> Because I copied and pasted the command into konsole I forgot to change the
> speed from 4x.  Will try that on the next one.  Getting somewhere now
> anyways...
>
> Thanks for your help Bryan.

Try at the lowest speed 1x, and then see if it works better.  Keep in mind, I 
only suggest this for audio cd's, never for any other kind.  For some reason 
audio cd players are often simply fussier about things, but I suspect it has 
something to do with media, laser refraction and standards when the devices 
were built.

I have links to a site somewhere where one of the engineers who created the cd 
specs goes into great detail about how lasers are used to burn data onto 
different chemical compounds that make up commercial cds, consumer cd 
recordables and consumer rewritables, all of which use different compounds 
and different refraction properties to hold data.  Interesting but very dry, 
minute stuff.

The long and short of it is, older cd players will have better luck with cd 
audio that is burned at slower speeds, less chance for the recorder to make 
minute errors in laying out the tracks or putting the exact amount of space 
expected to be between the tracks.  The slower the burn, the more compatible 
the disc.

On older cd players that have problems recognizing cd recordable media, it is 
often much better to use rewritable media.  This is because the refraction 
properties of the laser material of rewritable media is actually closer to 
the properties of commercial cd media than is consumer recordable media.  So, 
the laser read device in an older cd player has a better chance of picking up 
the data bits on a rewritable cd than on a recordable cd.
-- 
Bryan Phinney
Software Test Engineer


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