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Topic: Disc Rot In EAC (Read 4262 times) previous topic - next topic
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Disc Rot In EAC

I have two copies of the same CD. One had disc rot the other did not. They both copied fine, but I'm wondering which to use because the disc with rot copied more accurately than the one without.


The Log without disc rot.

Exact Audio Copy V1.0 beta 3 from 29. August 2011

EAC extraction logfile from 2. July 2014, 21:44

Dokken / Tooth and Nail [9 60376-2]

Used drive  : HL-DT-STBD-RE  WH14NS40  Adapter: 3  ID: 0

Read mode              : Secure
Utilize accurate stream : Yes
Defeat audio cache      : Yes
Make use of C2 pointers : No

Read offset correction                      : 6
Overread into Lead-In and Lead-Out          : No
Fill up missing offset samples with silence : Yes
Delete leading and trailing silent blocks  : No
Null samples used in CRC calculations      : Yes
Used interface                              : Native Win32 interface for Win NT & 2000

Used output format : Internal WAV Routines
Sample format      : 44.100 Hz; 16 Bit; Stereo


TOC of the extracted CD

    Track |  Start  |  Length  | Start sector | End sector
    ---------------------------------------------------------
        1  |  0:00.32 |  1:34.70 |        32    |    7151 
        2  |  1:35.27 |  3:39.70 |      7152    |    23646 
        3  |  5:15.22 |  4:34.23 |    23647    |    44219 
        4  |  9:49.45 |  3:30.17 |    44220    |    59986 
        5  | 13:19.62 |  4:10.28 |    59987    |    78764 
        6  | 17:30.15 |  3:44.30 |    78765    |    95594 
        7  | 21:14.45 |  4:27.00 |    95595    |  115619 
        8  | 25:41.45 |  3:35.67 |    115620    |  131811 
        9  | 29:17.37 |  4:19.38 |    131812    |  151274 
      10  | 33:37.00 |  4:43.65 |    151275    |  172564 


Range status and errors

Selected range

    Filename C:\EAC\Dokken - Tooth and Nail [9 60376-2]\Dokken - Tooth and Nail [9 60376-2].wav

    Peak level 92.8 %
    Extraction speed 5.8 X
    Range quality 99.9 %
    Copy CRC D32C8645
    Copy OK

No errors occurred


AccurateRip summary

Track  1  accurately ripped (confidence 15)  [E75663AC]  (AR v2)
Track  2  accurately ripped (confidence 18)  [5676A465]  (AR v2)
Track  3  accurately ripped (confidence 18)  [4343762E]  (AR v2)
Track  4  accurately ripped (confidence 17)  [335BFBBF]  (AR v2)
Track  5  accurately ripped (confidence 17)  [CD6EB4BB]  (AR v2)
Track  6  cannot be verified as accurate (confidence 35)  [44C96E35], AccurateRip returned [4564B75D]  (AR v2)
Track  7  accurately ripped (confidence 17)  [8561BE03]  (AR v2)
Track  8  accurately ripped (confidence 19)  [EBA89B9B]  (AR v2)
Track  9  accurately ripped (confidence 18)  [0F9E63ED]  (AR v2)
Track 10  accurately ripped (confidence 17)  [00FC2F96]  (AR v2)

9 track(s) accurately ripped
1 track(s) could not be verified as accurate

Some tracks could not be verified as accurate

End of status report


And the one with disc rot



Exact Audio Copy V1.0 beta 3 from 29. August 2011

EAC extraction logfile from 3. July 2014, 11:32

Dokken / Tooth and Nail [960376-2]

Used drive  : HL-DT-STBD-RE  WH14NS40  Adapter: 3  ID: 0

Read mode              : Secure
Utilize accurate stream : Yes
Defeat audio cache      : Yes
Make use of C2 pointers : No

Read offset correction                      : 6
Overread into Lead-In and Lead-Out          : No
Fill up missing offset samples with silence : Yes
Delete leading and trailing silent blocks  : No
Null samples used in CRC calculations      : Yes
Used interface                              : Native Win32 interface for Win NT & 2000

Used output format : Internal WAV Routines
Sample format      : 44.100 Hz; 16 Bit; Stereo


TOC of the extracted CD

    Track |  Start  |  Length  | Start sector | End sector
    ---------------------------------------------------------
        1  |  0:01.00 |  1:34.62 |        75    |    7186 
        2  |  1:35.62 |  3:39.70 |      7187    |    23681 
        3  |  5:15.57 |  4:34.23 |    23682    |    44254 
        4  |  9:50.05 |  3:30.17 |    44255    |    60021 
        5  | 13:20.22 |  4:10.35 |    60022    |    78806 
        6  | 17:30.57 |  3:44.30 |    78807    |    95636 
        7  | 21:15.12 |  4:26.68 |    95637    |  115654 
        8  | 25:42.05 |  3:36.00 |    115655    |  131854 
        9  | 29:18.05 |  4:19.30 |    131855    |  151309 
      10  | 33:37.35 |  4:43.52 |    151310    |  172586 


Range status and errors

Selected range

    Filename C:\EAC\Dokken - Tooth and Nail [9 60376-2] 2\Dokken - Tooth and Nail [960376-2].wav

    Peak level 92.8 %
    Extraction speed 2.2 X
    Range quality 99.9 %
    Copy CRC 3B31EECA
    Copy OK

No errors occurred


AccurateRip summary

Track  1  accurately ripped (confidence 10)  [BDB405C7]  (AR v2)
Track  2  accurately ripped (confidence 11)  [314B398C]  (AR v2)
Track  3  accurately ripped (confidence 11)  [B131B992]  (AR v2)
Track  4  accurately ripped (confidence 10)  [ADE8EAF7]  (AR v2)
Track  5  accurately ripped (confidence 10)  [DDFC0B6F]  (AR v2)
Track  6  accurately ripped (confidence 10)  [C2892D16]  (AR v2)
Track  7  accurately ripped (confidence 10)  [7F098645]  (AR v2)
Track  8  accurately ripped (confidence 10)  [B8B8CFB5]  (AR v2)
Track  9  accurately ripped (confidence 11)  [530704C5]  (AR v2)
Track 10  accurately ripped (confidence 10)  [07C1FA83]  (AR v2)

All tracks accurately ripped

End of status report




The disc rot is only two small spots and the rest of the disc is perfect, but track 6 ripped correctly on the one with rot. The one without rot didn't. My main question here is does disc rot corrupt data in a way that neither EAC or accuraterip can detect? Which copy should I use?

Disc Rot In EAC

Reply #1 –
Odd. I just checked the CD times. 38:20.160 (101 437 056 samples) is the time of disc rot. 38:20.440 (101 449 404 samples) is normal. The catalog numbers are the same and they were both printed in the USA. How's that possible?

Disc Rot In EAC

Reply #2 –
>rot corrupt data in a way that neither EAC or accuraterip can detect?

No, AccurateRip would detect disc rot as it would change the audio and generate a different AccurateRip CRC.

Disc Rot In EAC

Reply #3 –
Quote from: The Necromancer on
The disc rot is only two small spots and the rest of the disc is perfect, but track 6 ripped correctly on the one with rot. The one without rot didn't. My main question here is does disc rot corrupt data in a way that neither EAC or accuraterip can detect? Which copy should I use?

Ignore what the discs look like and use the one that AccurateRip reports as having ripped correctly.  It's not clear what you mean by "disc rot" here but visible flaws on a disc won't necessarily prevent it from being ripped correctly (CD error correction is pretty robust), and a disc with no visible flaws will not necessarily be readable.  The AccurateRip results are definitive.

In reference to your other question, the discs have different lengths because they're different masterings.  You can see this by comparing the index points in the "TOC of the extracted CD" parts of the two logs, and it's almost 100% certain that they'll have different matrix codes mastered on the disc towards the center hub. It's not at all unusual for a title to exist in multiple masterings with the same label, catalog number, and country of release, especially if the album came out in the early CD era (and as a 1984 release Tooth and Nail definitely qualifies).

Disc Rot In EAC

Reply #4 –
Probably not different masterings, but just different pressings. It happens sometimes that they have slightly different TOCs.

Disc Rot In EAC

Reply #5 –
Quote from: Goratrix on
Probably not different masterings, but just different pressings. It happens sometimes that they have slightly different TOCs.

It's possible that they both come from the same audio mastering, but if they have different TOCs they're from different physical masterings by definition. And don't be too quick to rule out different audio masterings as well -- its insane sales numbers may make it an outlier, but before its first "formally announced" remastering in 1996 Dire Straits' Brothers in Arms was sold in the US as Warner Bros. 9 25864-2 with at least four distinct audio masterings (three if you don't count the one where the only difference is a glitch on a single track).

It'd be interesting to see the per-track peak levels from the two rips.

Disc Rot In EAC

Reply #6 –
Agreed with the possibility of different masters and even mixes. I have two copies of Dokken's 'Dysfunctional'. One has more of George Lynch's soloing, while the other has more parts where Don croons. They're both legit releases.

The first rip is stuffed, but could be fixed by using CueTools. Load the cuesheet, then encode. If it can be fixed, CueTools will let you know.

Disc Rot In EAC

Reply #7 –
[/quote]
It's possible that they both come from the same audio mastering, but if they have different TOCs they're from different physical masterings by definition. And don't be too quick to rule out different audio masterings as well -- its insane sales numbers may make it an outlier, but before its first "formally announced" remastering in 1996 Dire Straits' Brothers in Arms was sold in the US as Warner Bros. 9 25864-2 with at least four distinct audio masterings (three if you don't count the one where the only difference is a glitch on a single track).

It'd be interesting to see the per-track peak levels from the two rips.
[/quote]

Replay gain scan showing track by track peaks of each.

https://app.box.com/s/tcm0l13bef2k5snnzmtg - Disc without rot. 38:20.440 Serial: 0 7559-60376-2 4

https://app.box.com/s/3g05nzlivp6l2nn138pq - With it. 38:20.160 Serial:  0 7559-60376-2

God I miss when CD's were that quiet.

There is nothing really that you can do mastering wise that could make this album sound good. A story has circulated saying that Tom Werman had just replaced all the analog mixing equipment with digital before the band began recording. It had just gotten there, so no one knew how to use it. I'd believe that. This album is pretty thin sounding. As Kevin Shirley would put it, it had no balls. I can't confirm this because the CD has no SPARS code. On the back it has the, "The music on this compact disc was originally recorded on analog equipment. We have attempted to preserve, as closely as possible, the sound of the original recording. Because of its high resolution, however, the Compact Disc can reveal limitations of the source tape." warning on it. My guess is ADD.