[paranoia] Streaming Errors

[John Lawless]

Monty,

     I (finally) got the chance to test the streaming error corrections.  I
did two runs on a CD that created many "+"s in the progress bar (but no
"V").  As Bill suggested, I converted the data to ascii and compared.  As
the data below show, the two runs, while very similar, do have slight
differences.  

     How does cdparanoia decide whether it's DAE is good enough?

     Points of difference between the runs are marked with "*".  The
conversion from WAV to ASCII was done with "cdrdao show-data":

------ Pass 1 -------   ------ Pass 2 -------
Sample #   Ch1    Ch2   Sample #   Ch1    Ch2
--------   ---    ---   --------   ---    ---
1668215:   149   -351	1668215:   149   -351
1668216:   161   -262 *  1668216:   161   -248 *
1668217:   217   -144	1668217:   217   -144
1668218:   186    -78 *  1668218:   186    -95 *
1668219:   157    -45	1668219:   157    -45
1668220:   192     45	1668220:   192     45
1668221:   221    144	1668221:   221    144
1668222:   224    193	1668222:   224    193
1668223:   198    193	1668223:   198    193
1668224:   210    243	1668224:   210    243
1668225:   259    361	1668225:   259    361
1668226:   279    403	1668226:   279    403
1668227:   258    394	1668227:   258    394
1668228:   249    416 *	1668228:   249    428 *
1668229:   256    462	1668229:   256    462
1668230:   247    484 *	1668230:   247    472 *
1668231:   226    482	1668231:   226    482
1668232:   230    474	1668232:   230    474
1668233:   284    554	1668233:   284    554
1668234:   289    571 *	1668234:   289    529 *
1668235:   249    505	1668235:   249    505
1668236:   264    516 *	1668236:   264    515 *
1668237:   276    525	1668237:   276    525
...
1668260:    39   -445	1668260:    39   -445
1668261:    49   -440	1668261:    49   -440
1668262:    25   -462 *	1668262:    25   -466 *
1668263:    -5   -491	1668263:    -5   -491
1668264:    -7   -507 *	1668264:    -7   -497 *
1668265:    18   -503	1668265:    18   -503
...
1668349:  -427   -924	1668349:  -427   -924
1668350:  -429   -974	1668350:  -429   -974
1668351:  -433   -998	1668351:  -433   -998
1668352:  -403   -950 *	1668352:  -403   -966 *
1668353:  -381   -934	1668353:  -381   -934
1668354:  -358 * -947	1668354:  -346 * -947
1668355:  -311   -907	1668355:  -311   -907
1668356:  -278 * -825	1668356:  -303 * -825
1668357:  -295   -819	1668357:  -295   -819
1668358:  -289   -803	1668358:  -289   -803

Again, the results are very similar.  Where there are differences between
the two runs, the differences are typically no more than 10 to 25 counts.

Thanks,

John  

On Sun, Jun 18, 2000 at 07:24:15PM -0700, Monty wrote:
> >      When should DAE be considered successful?  
> > 
> >      Specifically, when cdparanoia reports many "+"s in the progress bar
> > (i.e. "Unreported loss of streaming/other error in read") and the output
> > smiley is often a ":-P" (i.e. "Unreported loss of streaming in atomic read
> > operation"), does this mean that errors have been successfully corrected or
> > should the resulting WAV file be considered unreliable?
> 
> The errors have been corrected.
> 
> >      Normally, cdparanoia runs for me without any errors.  The exception is
> > a couple of Maxell CD-Rs I received that generate these streaming errors.
> > 
> >      Are there any runtime options to help with this type of problem?  (I
> > tried "-z" which seemed to help: after a run with many "+"s and 1 "V" , a
> > run with "+z" on the same CD produced many "+"s but no "V".)
> 
> 'V' is the only certain worry.  Lots of '!' also likely indicates a problem.  
> '+' and '-' are nothing to worry about if using paranoia.
> 
> Monty
> 
> 
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