[s-cars] creating CDs for the Audi/Bose system

[Olek]

Close, very close to true.

It is a common knowledge that CD's are burned and read by using a laser beam (ok, factory
CD's are made by stamping, but master stamp is burned by a laser anyway).

The laser frequency have to mach in burner/player in order to get reliable player.
And those frequencies are different for plain CD's, CDR's and CRRW's.
I do not remember the numbers, but frequencies for CD and CDR are relatively far apart,
and frequency for CDRW is in between.

Consequence: new players that are being advertised as CDR/CDRW compatible have 2 (or sometimes
3) lasers to be able to operate on all types of media. Old (and new but cheaper) players
have only one laser that they are trying to use for all the medias. And here result is
unpredictable: some players may handle it better than others, they might like some media
more etc etc. Since laser frequency used to burn CDRW is closer to plain CD frequency than
CDR, there are higher chances to play CDRW in old/cheaper players than CDR.

Bottomline: try using CDRW. If your problem will go away - than you know what is
happening, right?

Disclaimer: I am not working in CD industry, so all this information is truely AFAIK.


> Couple things I've noticed about burned CD's from a computer:
>
> The media does matter, as some have already mentioned.  Also, if you record
> a disc as a CD-R as opposed to a CD-RW you'll usually have better luck with
> getting it to track properly.
>
> My understanding is that the reason some CD players can't read the disc very
> well is because a computer burner doesn't etch the info as deeply as the
> original copy.  Thus, it tends to not track well and is more likely to skip.
> And recording as an RW etches the info even less deeply than a CD-R.
>
> Maybe we could get a poll going on the media people are using successfully?
>
> Unfortunately, older technology doesn't work quite as well with the new
> tech...
>
> -Matt, CO
> 92 s4


regards,
   Olek