18 Dec
2003
18 Dec
'03
5:07 p.m.
From: Fred Gleason <fredg(a)salemradiolabs.com>
The bottom line: your CD reader is too broken to reliably rip audio. In
particular, the 'unreported loss of streaming' error indicates buggy firmware
in the drive.
Yeah, it is one of those HP devices (Sony inside), not cheapest device
as I preferred quality. Of course, it could be a bug or design flaw
in cdparanoia as well. That is what I would like to developers to look
at. Why would a CD device output data with channels swapped? Why
would a CD device have an align problem when CD reads ok
(after the "!" location)? It could be that cdparanoia falls down at the
"!" location and does not come up even it could. Because it could
be either the CD device or cdparanoia which falls down, I would
not rush in to the final report as fast as you did. Things should
be examined.
I yet have to test ripping starting after the bad location. If that
works ok, then cdparanoia could just restart after getting "!"
errors, right?
Yes, I have a hardware problem, specially when using CDROM
but also with disks. Buggy IDE I think, or Linux does not support
Intel IDE well (4.?.18 kernel). Anyone would have a couple of years
old spare motherboard and could send it free for me?
I would not like to buy a new one (because I have no money) because
I would then yet again have to wait for 1.5 years before I get new
enough Linux for having full support for the chips (or again to find out
that the new kernel won't help at all).
Regards,
Juhana
18 Dec
18 Dec
5:51 p.m.
New subject: [linux-audio-dev] cdparanoia fails / audiofile comparer
On Thursday 18 December 2003 16:05, Juhana Sadeharju wrote:
Yeah, it is one of those HP devices (Sony inside), not
cheapest device
as I preferred quality. Of course, it could be a bug or design flaw
in cdparanoia as well.
Always a possibility.
I yet have to test ripping starting after the bad
location. If that
works ok, then cdparanoia could just restart after getting "!"
errors, right?
Sure, but finding the *exact* spot (i.e. with sample-level accuracy) to
restart from is not so easy. Remember, we're talking Red Book CD format here
-- there are no sample-accurate positioning data in the disk sectors, just
PCM samples. If the drive loses streaming, there's no reliable way to
determine precisely where the read left off. Paranoia does contain logic to
try to determine this, but as you've seen, its not foolproof, nor can be it
by the very nature of the task. These sorts of positioning errors can lead
to precisely the sort of "swapped channels" problem you describe.
Ultimately, if the hardware/firmware lies, there's little that can be done
about it beyond indicating that an inconsistency was found (which is what
the ! means).
Yes, I have a hardware problem, specially when using
CDROM
but also with disks. Buggy IDE I think, or Linux does not support
Intel IDE well (4.?.18 kernel). Anyone would have a couple of years
old spare motherboard and could send it free for me?
Then I wouldn't be spending time picking Paranoia apart until this issue is
resolved. I *highly* doubt it's a kernel problem, unless you're running a
bleeding-edge experimental IDE driver. IDE problems in production kernels
tend to get found and fixed very quickly.
Cheers!
|-------------------------------------------------------------------------|
| Frederick F. Gleason, Jr. | Director of Broadcast Software Development |
| | Salem Radio Labs |
|-------------------------------------------------------------------------|
| Never worry about theory as long as the machinery does what it's |
| supposed to do. |
| -- Robert A. Heinlein |
|-------------------------------------------------------------------------|
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Fred Gleason -
Juhana Sadeharju