Copying audio CD with dd/cdrecord produces unplayable CD

Polytropon freebsd at
Sat Nov 29 01:01:59 PST 2008

On Sat, 29 Nov 2008 00:53:32 -0800, Yuri <yuri at> wrote:
> Polytropon wrote:
> > On Fri, 28 Nov 2008 23:26:51 -0800, Yuri <yuri at> wrote:
> >   
> > If you need to use cdrecord, you can "preprocess" the .cdr
> > files with "sox -x". You can always use the "play" command
> > (from sox) to check what your files sound like.
> >   
> 'sox -x' fails for some tracks with the message:
> sox formats: no handler for detected file type `video/x-unknown'

Strange... are these definitely audio CD tracks? You could
use this form to explicitely tell sox how to interpret the
data (which is "headerless" on audio CDs, of course):

	sox -r 14400 -c 2 -b -L -S -x track.cdr track_rev.cdr

This describes CD audio as 14.4 kHz stereo 16 Bit (little
endian - to be swapped). From the manual:

              The sample datum size is 1, 2, 3, 4, or 8 bytes; i.e. 8, 16, 24,
              32, or 64 bits.

       The flags
              -b/-w/-l/-d  which are respectively aliases for -1/-2/-4/-8, and
              abbreviate byte, word, long word, double long (long long)  word,
              are retained for backwards compatibility only.

Seems like I'm a bit old fashioned. :-)

> and for some other tracks with these errors:
> sox mp3-duration: recoverable MAD error
> sox mp3-duration: MAD lost sync
> sox mp3-duration: recoverable MAD error
> sox mp3-duration: recoverable MAD error

This looks like that sox reads / generates MP3 files...?
Are these definitely standard audio CD tracks (such as every
old fashioned CD player can play)?

>From Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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