MP3 cd's...

[Ben Pfaff]

Adam McDougall <mcdouga9@egr.msu.edu> writes:

> I believe burning at 2x and above may burn it slightly differently than
> 1x, you can see if www.cdrfaq.org has any more info about it.  I'm
> inbetween classes or I'd look myself out of curiosity =P

>From there, what I saw as relevant:

  Subject: [3-34] Can CD-Rs recorded at 2x be read faster than 2x?
  (1999/09/22)

   Of course.

   The only possible basis in fact for the, "if it was recorded
   at 2x, you can't read it faster than 2x" rumors is that some
   drives have trouble reading CD-R media. Discs that are hard to
   read when spinning at 12x may become easier to read when
   spinning at 4x. It has also been noted that some recorders
   will write more legible discs at certain speeds (e.g. the
   Yamaha CDR-100, which works better at 1x or 4x than it does at
   2x). None of this should lead anyone to conclude, however,
   that the write speed and read speed are tied directly
   together. The reader, writer, and media all have a role in
   determining how quickly a CD-R can spin and be readable.

   It's also the case that discs written at high speed (say 8x)
   can be read by drives *slower* than 8x. So if you're
   distributing discs to people with old 4x CD-ROM drives, you
   don't have to worry about them not being able to read at
   8x. Of course, if the CD-ROM is poorly constructed, or the
   writer is producing marginal discs at high speeds, you might
   see evidence to the contrary, but there is no technical
   barrier to reading discs recorded at 8x or 12x on a slower
   drive.

  Subject: [4-23] Having trouble playing an audio CD in a home or car player
  (2000/02/06)

   There are a few possibilities. First and foremost is media
   compatibility. Not all players get along with all brands of
   CD-R media. You need to find a combination of recorder, media,
   and player that get along. Read section (7-2) to learn more. A
   CD-R media identifier (like the one listed in section (6-2-9))
   can help you be sure that you're trying discs from different
   manufacturers.

   If you're trying to use CD-RW media, your odds are even
   worse. CD-RW discs simply won't play on most CD players.

   Another common problem is failing to close the disc at the end
   of writing. You can't play an audio CD on a common CD player
   until the session has been closed. You may be able to play it
   back with the CD recorder though. Also, don't forget that you
   have to write all of the audio data into the first session of
   a multisession CD. CD players don't know how to find the later
   sessions, so tracks written there won't get played.

   Sometimes the CD player will spin the disc up but won't start
   playing it. Sometimes it will have no problem playing the
   tracks, but will have a great deal of difficulty seeking
   between tracks or moving fast-forward. Using a different brand
   of media or a different CD player may produce better results.

   If you're getting skips and jumps, make sure that you don't
   have anti-skip protection enabled. This is usually only
   available on portable or car players, and you may not be able
   to disable it on car players.

   Some media works better at 1x, 2x, or 4x than it does at other
   speeds. You may find that slowing down or speeding up the
   recorder helps.

   Finally, remember that you have to write the disc in CD-DA
   format! If you just write a bunch of .WAV files to a disc in
   CD-ROM format, it's not going to work in your home stereo.

  Subject: [4-40] Why do CD-Rs work poorly when anti-skip protection is enabled?
  (2000/05/31)

   When a CD player is playing a disc without any sort of
   anti-skip protection, it spins the disc at 1x, and attempts to
   correct whatever errors it gets. If it can't correct them, it
   does the best it can and keeps going.

   When an anti-skip feature (such as Sony's "ESP") is in use,
   the disc is played at a faster speed (perhaps 2x), and when
   uncorrectable errors are encountered, the failed section is
   re-read.

   CD-R discs are generally harder to read than pressed discs, so
   there is a greater likelihood of encountering uncorrectable
   errors. In some cases a player may get stuck re-reading a
   particular section, and the playback will have lots of skips
   and jumps as a result.

   The skip protection feature can usually be turned off on
   portables. On car players you may have to find a brand of
   media that works better.

> On Wed, 18 Apr 2001, Edward Glowacki wrote:
> 
> > OK, "CD needs to be burned at 2X speed or higher."  Umm.... *ponder*
> > *scratches head* *looks quizically at the words* *raises an eyebrow*

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