Hi everybody,
first of all, I'd like to thank you all so much for the prompt
and many replies I've got... Wow, they came in faster then I was
able to read! :-)
(there's still someone claiming that Linux has no support?! :-)
On Wednesday 21 November 2007 22:19, Sergei Steshenko wrote:
> Extracting data digitally from CD is unrelated to soundcard.
>
> Perform web search for 'cdparanoia'.
mmmh... maybe I've not been clear enough with my question.
Of course I know how to extract CD data. :-)
BTW, in case someone could be interested (and sorry for
the off topic):
[OT on]
In fact, unfortunately cdparanoia is not (or perhaps no
longer) good enough to do "perfect" DAE.
Sadly I had to resort to a non-free, closed source windoze
software, namely "EAC" (at least it works well under Linux
using wine and is freeware/"cardware").
I guess the problems with cdparanoia may be due to the fact
that most (if not all) recent CD and DVD drives use to cache
audio data and that perhaps fools cdparanoia checks.
AFAIK in cdparanoia CVS there is/was a patch to disable
audio caching, but again AFAIK it does not work and was
never included in any release.
If you don't believe me, try to extract several times the
same CD on different drives and compare the resulting wav
files... (e.g. using "shntool cmp -s").
Even after disregarding the possible "byte-shift" which
is almost always present when extracting using different
drives, the extracted data may (and often will) differ.
IME it depends a lot on the drives used as well as on the
CD being extracted.
Sometimes you may find differences even when repeating the
extraction on the same drive, but IME it looks like -for a
given CD- the same drive tends to repeat the same errors in
the same place(s). Thus this problem is definitely easier
to detect comparing extractions from different drives.
I have also got differences in extracted data (using the
same drive) depending on the cdparanoia extraction "mode",
i.e. whether extracting the whole CD at once or track by
track in "batch" mode!! ( =:-O :|
I guess this may be very drive dependent, though I usually
use good (or at least so believed) drives for DAE, such as
Plextor ones (for the sake of curiosity I have also tried
with some cheap LGs, too).
In fact I used to trust cdparanoia, and had a bad surprise
when I have done this tests. :-(
Luckily, I did 'em before beginning the mass-extraction of
my rather large CD collection...
[OT off]
> In fact, if you want reliable sound, first transfer data from _all_ your
> audio CDs to HD and then play it from there.
that's exactly what I was planning to do... 8-)
(actually, the final plan is to use a remote RAID storage
while the local, dedicated machine should be both fanless
and diskless to be completely quiet).
> I have never used SPDIFF myself though.
well, I did... but my current SC is a cheap piece of ****, only
allows 48KHz output (aargh, resampling required... that's bad!)
and "of course" does not allow synchronization to any external
clock in any way.
Nevertheless, even in such a desperate and "lo-fi" setup, using
ALSA it didn't sound too bad when connected to my external DAC
(of course playing a CD from the dedicated transport the overall
quality is in another league... but I am confident that with a
proper setup I can even better the CD transport results).
Ciao,
Paolo.
--
Skype: Paolo.Saggese
http://borex.lngs.infn.it/saggese
You can still escape from the GATES of hell: Use Linux!
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