How Does Drive Offsets Affect Ripping

Beginning

The research came from this album: Girls' Generation (소녀시대) - Genie (소원을 말해봐).

My friend A ripped a release whose cat. # is SMCD-186. And another friend B’s ripping can be downloaded from here (extraction code: d09f). Check two logs, we can find their ToCs, peak levels, track CRCs are the same on 1~5 tracks, but on track 6, their CRCs are different.

Different CRC means different audio data. So I asked A to give me track 6 and threw it into fb2k to see its MD5, they are different, indeed. So the difference comes from where? I transcoded them to WAV and use the EAC WAV comparison tool to test, then got this result:

Not the same. Let’s see what did ARDB and CTDB say. Threw the whole album files into CUETools and tested, here are the results:

[CUETools log; Date: 2020/3/7 15:15:18; Version: 2.1.6]
[CTDB TOCID: w0a2VXd8j85of5cG9m3ByKY_csA-] found.
Track | CTDB Status
  1   | (130/132) Accurately ripped
  2   | (130/132) Accurately ripped
  3   | (130/132) Accurately ripped
  4   | (130/132) Accurately ripped
  5   | (130/132) Accurately ripped
  6   | (129/132) Accurately ripped
[AccurateRip ID: 00052afd-001b9788-3f052006] found.
Track   [  CRC   |   V2   ] Status
 01     [cca3c3de|50309fed] (23+29/60) Accurately ripped
 02     [e4791079|d04c0865] (23+31/62) Accurately ripped
 03     [256c2d95|715f6906] (23+31/62) Accurately ripped
 04     [069ced68|f3a3ee19] (23+31/62) Accurately ripped
 05     [4284c198|0ac1e0d9] (23+31/62) Accurately ripped
 06     [7da3ce29|904c5c88] (22+31/59) Accurately ripped
Offsetted by -1322:
 01     [7bbba076] (00/60) No match (V2 was not tested)
 02     [7c00b086] (00/62) No match (V2 was not tested)
 03     [be0dadb5] (00/62) No match (V2 was not tested)
 04     [08bcbae8] (00/62) No match (V2 was not tested)
 05     [d8391872] (00/62) No match (V2 was not tested)
 06     [d86ae7f7] (00/59) No match (V2 was not tested)
Offsetted by -634:
 01     [21a5136e] (00/60) No match (V2 was not tested)
 02     [9692ee2e] (00/62) No match (V2 was not tested)
 03     [7570aa61] (00/62) No match (V2 was not tested)
 04     [0170aee6] (00/62) No match (V2 was not tested)
 05     [42f39918] (00/62) No match (V2 was not tested)
 06     [6a6eacb4] (00/59) No match (V2 was not tested)
Offsetted by 12:
 01     [44190ed0] (00/60) No match (V2 was not tested)
 02     [7cd8fabc] (00/62) No match (V2 was not tested)
 03     [b8f7907f] (00/62) No match (V2 was not tested)
 04     [30957b02] (00/62) No match (V2 was not tested)
 05     [720fad1f] (00/62) No match (V2 was not tested)
 06     [5bb016d5] (00/59) No match (V2 was not tested)
Track Peak [ CRC32 ] [W/O NULL] [ LOG ]
– 100.0 [C1C0A371] [03B2A233]
01 100.0 [1C1C7F1A] [62B946B9] CRC32
02 100.0 [333C08B0] [2892567E] CRC32
03 100.0 [181B1DD9] [1A963B1D] CRC32
04 100.0 [093752F5] [BF1464C1] CRC32
05 100.0 [BC8F1D97] [EA233DAA] CRC32
06 100.0 [CBAFCA04] [2699FD79] CRC32

[CUETools log; Date: 2020/3/7 13:41:55; Version: 2.1.6]
[CTDB TOCID: w0a2VXd8j85of5cG9m3ByKY_csA-] found.
Track | CTDB Status
  1   | (130/132) Accurately ripped
  2   | (130/132) Accurately ripped
  3   | (130/132) Accurately ripped
  4   | (130/132) Accurately ripped
  5   | (130/132) Accurately ripped
  6   | (129/132) Accurately ripped
[AccurateRip ID: 00052afd-001b9788-3f052006] found.
Track   [  CRC   |   V2   ] Status
 01     [cca3c3de|50309fed] (23+29/60) Accurately ripped
 02     [e4791079|d04c0865] (23+31/62) Accurately ripped
 03     [256c2d95|715f6906] (23+31/62) Accurately ripped
 04     [069ced68|f3a3ee19] (23+31/62) Accurately ripped
 05     [4284c198|0ac1e0d9] (23+31/62) Accurately ripped
 06     [7da3ce29|904c5c88] (22+31/59) Accurately ripped
Offsetted by -1322:
 01     [7bbba076] (00/60) No match (V2 was not tested)
 02     [7c00b086] (00/62) No match (V2 was not tested)
 03     [be0dadb5] (00/62) No match (V2 was not tested)
 04     [08bcbae8] (00/62) No match (V2 was not tested)
 05     [d8391872] (00/62) No match (V2 was not tested)
 06     [d86ae7f7] (00/59) No match (V2 was not tested)
Offsetted by -634:
 01     [21a5136e] (00/60) No match (V2 was not tested)
 02     [9692ee2e] (00/62) No match (V2 was not tested)
 03     [7570aa61] (00/62) No match (V2 was not tested)
 04     [0170aee6] (00/62) No match (V2 was not tested)
 05     [42f39918] (00/62) No match (V2 was not tested)
 06     [6a6eacb4] (00/59) No match (V2 was not tested)
Offsetted by 12:
 01     [44190ed0] (00/60) No match (V2 was not tested)
 02     [7cd8fabc] (00/62) No match (V2 was not tested)
 03     [b8f7907f] (00/62) No match (V2 was not tested)
 04     [30957b02] (00/62) No match (V2 was not tested)
 05     [720fad1f] (00/62) No match (V2 was not tested)
 06     [5bb016d5] (00/59) No match (V2 was not tested)
Track Peak [ CRC32 ] [W/O NULL] [ LOG ]
– 100.0 [9B52F365] [056D7D9B]
01 100.0 [1C1C7F1A] [62B946B9] CRC32
02 100.0 [333C08B0] [2892567E] CRC32
03 100.0 [181B1DD9] [1A963B1D] CRC32
04 100.0 [093752F5] [BF1464C1] CRC32
05 100.0 [BC8F1D97] [EA233DAA] CRC32
06 100.0 [913D9A10] [87642E4F] CRC32

Why

It’s worth thinking about this. Why they can own the same ARDB and CTDB ID with different audio data, which means in the database’s eyes, they are the same and considered as Accurately ripped. I’m gonna figure this out, So I see:

The checksum algorithm ignores the first 2939 samples (just under 5 frames, a little over 0.013s of audio) at the beginning of the first track, and ignores 2940 samples (exactly 5 frames) at the end of the last track. The largest drive offset in the database, as of late 2011, is only 1776 samples, so when an offset-corrected drive “overreads” beyond the boundaries of the audio data, it normally won’t affect the checksum. If the overread were to exceed 2940 samples, though, the algorithm assumes the data is padded with digital silence (nothing but zeroes). If your drive isn’t capable of overreading and your DAE software doesn’t zero-pad the rip to simulate an overread, then it’s unlikely the checksums of your rips will be submitted to or compared against those in the AccurateRip database.

https://wiki.hydrogenaud.io/index.php?title=AccurateRip

Understand. The reason why they can share the same database ID is databases ignored a part of samples that covered different samples. And samples that remained are the same.

Research

But I want to know the detail about their differences. The divergences are focused on the last 0.015 seconds. Let’s have a look first. Adobe Audition, GO!

I zoomed in to observe the last 0.186 seconds of both track 6s, here is the result:

They are different. What about the wave? (Please notice that I zoomed up the scale on the right. If I didn’t do so, you can’t find any difference, because the sound is too weak)

You can see B’s tail lack some content obviously, how long it is? As we mentioned above, the length of difference is 0.015 seconds, and there are 44100 samples per second. So 0.015 seconds equals around 661 samples. Read the logs again:

Exact Audio Copy V1.3 from 2. September 2016
EAC extraction logfile from 10. June 2019, 21:03
Girls' Generation / Genie
Used drive : ASUS DRW-24B1ST j Adapter: 1 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 : Installed external ASPI interface
Gap handling : Appended to previous track
Used output format : User Defined Encoder
Selected bitrate : 896 kBit/s
Quality : High
Add ID3 tag : No
Command line compressor : C:\Program Files\Exact Audio Copy\Flac\flac.exe
Additional command line options : -8 -V -T “ARTIST=%artist%” -T “TITLE=%title%” -T “ALBUM=%albumtitle%” -T “DATE=%year%” -T “TRACKNUMBER=%tracknr%” -T “GENRE=%genre%” -T “PERFORMER=%albuminterpret%” -T “COMPOSER=%composer%” %haslyrics%–tag-from-file=LYRICS="%lyricsfile%"%haslyrics% -T “ALBUMARTIST=%albumartist%” -T “DISCNUMBER=%cdnumber%” -T “TOTALDISCS=%totalcds%” -T “TOTALTRACKS=%numtracks%” -T “COMMENT=%comment%” %source% -o %dest%
TOC of the extracted CD
 Track |   Start  |  Length  | Start sector | End sector
---------------------------------------------------------
    1  |  0:00.00 |  3:50.41 |         0    |    17290
    2  |  3:50.41 |  3:13.64 |     17291    |    31829
    3  |  7:04.30 |  3:19.15 |     31830    |    46769
    4  | 10:23.45 |  3:50.43 |     46770    |    64062
    5  | 14:14.13 |  3:36.58 |     64063    |    80320
    6  | 17:50.71 |  4:01.14 |     80321    |    98409

Track 1
 Filename C:\EAC Rips\Girls' Generation - Genie (2009) [FLAC]\01 - Genie.wav

 Pre-gap length  0:00:02.00

 Peak level 100.0 %
 Extraction speed 5.1 X
 Track quality 100.0 %
 Test CRC 1C1C7F1A
 Copy CRC 1C1C7F1A
 Accurately ripped (confidence 27)  [50309FED]  (AR v2)
 Copy OK

Track 2
 Filename C:\EAC Rips\Girls' Generation - Genie (2009) [FLAC]\02 - Etude.wav

 Pre-gap length  0:00:01.98

 Peak level 100.0 %
 Extraction speed 4.7 X
 Track quality 99.9 %
 Test CRC 333C08B0
 Copy CRC 333C08B0
 Accurately ripped (confidence 29)  [D04C0865]  (AR v2)
 Copy OK

Track 3
 Filename C:\EAC Rips\Girls' Generation - Genie (2009) [FLAC]\03 - Girlfriend.wav

 Pre-gap length  0:00:01.98

 Peak level 100.0 %
 Extraction speed 5.2 X
 Track quality 99.9 %
 Test CRC 181B1DD9
 Copy CRC 181B1DD9
 Accurately ripped (confidence 29)  [715F6906]  (AR v2)
 Copy OK

Track 4
 Filename C:\EAC Rips\Girls' Generation - Genie (2009) [FLAC]\04 - Boyfriend.wav

 Pre-gap length  0:00:01.98

 Peak level 100.0 %
 Extraction speed 6.5 X
 Track quality 100.0 %
 Test CRC 093752F5
 Copy CRC 093752F5
 Accurately ripped (confidence 29)  [F3A3EE19]  (AR v2)
 Copy OK

Track 5
 Filename C:\EAC Rips\Girls' Generation - Genie (2009) [FLAC]\05 - My Child.wav

 Pre-gap length  0:00:01.98

 Peak level 100.0 %
 Extraction speed 6.0 X
 Track quality 99.9 %
 Test CRC BC8F1D97
 Copy CRC BC8F1D97
 Accurately ripped (confidence 29)  [0AC1E0D9]  (AR v2)
 Copy OK

Track 6
 Filename C:\EAC Rips\Girls' Generation - Genie (2009) [FLAC]\06 - One Year Later.wav

 Pre-gap length  0:00:01.98

 Peak level 100.0 %
 Extraction speed 7.3 X
 Track quality 100.0 %
 Test CRC CBAFCA04
 Copy CRC CBAFCA04
 Accurately ripped (confidence 29)  [904C5C88]  (AR v2)
 Copy OK

All tracks accurately ripped
No errors occurred
End of status report
==== Log checksum 37C03F2F0C5C8DE510209AF37E84A6EFC0B4646E621FAE3DDEB6CB01819BFACE ====

Exact Audio Copy V0.99 prebeta 4 from 23. January 2008 EAC extraction logfile from 30. June 2009, 12:28 家赤矫措 (Girls Generation) / 家盔阑富秦毫 Used drive : HL-DT-STDVDRAM GSA-H42N Adapter: 3 ID: 0 Read mode : Secure Utilize accurate stream : Yes Defeat audio cache : Yes Make use of C2 pointers : No Read offset correction : 667 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 Gap handling : Appended to previous track Used output format : User Defined Encoder Selected bitrate : 128 kBit/s Quality : High Add ID3 tag : No Command line compressor : C:\Program Files\FLAC\flac.exe Additional command line options : -8 -V -T “ARTIST=%a” -T “TITLE=%t” -T “ALBUM=%g” -T “DATE=%y” -T “TRACKNUMBER=%n” -T “GENRE=%m” -T “COMMENT=EAC FLAC -8” %s TOC of the extracted CD Track | Start | Length | Start sector | End sector --------------------------------------------------------- 1 | 0:00.00 | 3:50.41 | 0 | 17290 2 | 3:50.41 | 3:13.64 | 17291 | 31829 3 | 7:04.30 | 3:19.15 | 31830 | 46769 4 | 10:23.45 | 3:50.43 | 46770 | 64062 5 | 14:14.13 | 3:36.58 | 64063 | 80320 6 | 17:50.71 | 4:01.14 | 80321 | 98409 Track 1 Filename E:\CD 赋俏\家赤矫措 (Girls Generation) - 家盔阑富秦毫\01 - 家盔阑富秦毫 (GENIE).wav Pre-gap length 0:00:02.00 Peak level 100.0 % Track quality 100.0 % Test CRC 1C1C7F1A Copy CRC 1C1C7F1A Track not present in AccurateRip database Copy OK Track 2 Filename E:\CD 赋俏\家赤矫措 (Girls Generation) - 家盔阑富秦毫\02 - ETUDE.wav Pre-gap length 0:00:01.74 Peak level 100.0 % Track quality 100.0 % Test CRC 333C08B0 Copy CRC 333C08B0 Track not present in AccurateRip database Copy OK Track 3 Filename E:\CD 赋俏\家赤矫措 (Girls Generation) - 家盔阑富秦毫\03 - 咯磊模备 (GIRLFRIEND).wav Pre-gap length 0:00:01.74 Peak level 100.0 % Track quality 100.0 % Test CRC 181B1DD9 Copy CRC 181B1DD9 Track not present in AccurateRip database Copy OK Track 4 Filename E:\CD 赋俏\家赤矫措 (Girls Generation) - 家盔阑富秦毫\04 - 巢磊模备 (BOYFRIEND).wav Pre-gap length 0:00:01.74 Peak level 100.0 % Track quality 100.0 % Test CRC 093752F5 Copy CRC 093752F5 Track not present in AccurateRip database Copy OK Track 5 Filename E:\CD 赋俏\家赤矫措 (Girls Generation) - 家盔阑富秦毫\05 - 悼拳 (MY CHILD).wav Pre-gap length 0:00:01.74 Peak level 100.0 % Track quality 100.0 % Test CRC BC8F1D97 Copy CRC BC8F1D97 Track not present in AccurateRip database Copy OK Track 6 Filename E:\CD 赋俏\家赤矫措 (Girls Generation) - 家盔阑富秦毫\06 - 1斥  (ONE YEAR LATER).wav Pre-gap length 0:00:01.74 Peak level 100.0 % Track quality 100.0 % Test CRC 913D9A10 Copy CRC 913D9A10 Track not present in AccurateRip database Copy OK None of the tracks are present in the AccurateRip database No errors occurred

End of status report

B’s offset is 667, and A’s offset is 6, 661 = 667 - 6. Of course, the difference has a relationship with the offset of drives. Consider both rippings didn’t open “Overread into Lead-In and Lead-Out” function, which means when a drive can not read anything when it runs into Lead-Out area, and thus can only add empty samples. They have 661 samples difference, which means the drive with 667 offset added 667 empty samples and the other one added 6.

Here we can tell, the saying “Different drives can rip the same data from the same CD if configured correctly” should have a limitation, which is “Within the error range”. If we require “Bit-accuracy”, they are not eligible. But this tiny little difference can not be aware by a human. Besides, we can get the conclusion that, if the drive doesn’t have overread ability or is closed in EAC settings, then with the higher positive offset value, we are at risk of losing more samples on the tail.

Experiment

The conclusion above is my reasonable prediction, then we need to do a controlled variable experiment to verify it. Here are the materials:

Drive: BENQ CDRW 52X32 (support overread with 738 offset value);
CD: doriko - 花束～the best of doriko feat. 初音ミク～;
Setting: only “Overread into Lead-In and Lead-Out” was turned on or off, everything else is the same.

Results:

Overread turns on

Exact Audio Copy V1.3 from 2. September 2016
EAC extraction logfile from 25. July 2020, 16:50
doriko feat. 初音ミク / 花束
Used drive : ATAPI CDRW 52X32 Adapter: 1 ID: 0
Read mode : Secure
Utilize accurate stream : Yes
Defeat audio cache : Yes
Make use of C2 pointers : No
Read offset correction : 738
Overread into Lead-In and Lead-Out : Yes
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
Gap handling : Appended to previous track
Used output format : User Defined Encoder
Selected bitrate : 1024 kBit/s
Quality : High
Add ID3 tag : No
Command line compressor : D:\Tools\FLAC\flac.exe
Additional command line options : -8 -e -p -V -T “ARTIST=%artist%” -T “TITLE=%title%” -T “ALBUM=%albumtitle%” -T “DATE=%year%” -T “TRACKNUMBER=%tracknr%” -T “GENRE=%genre%” -T “COMMENT=%comment%” -T “BAND=%albuminterpret%” -T “ALBUMARTIST=%albuminterpret%” -T “COMPOSER=%composer%” %haslyrics%–tag-from-file=LYRICS="%lyricsfile%"%haslyrics% -T “DISCNUMBER=%cdnumber%” -T “TOTALDISCS=%totalcds%” -T “TOTALTRACKS=%numtracks%” %hascover%–picture="%coverfile%"%hascover% %source% -o %dest%
TOC of the extracted CD
 Track |   Start  |  Length  | Start sector | End sector
---------------------------------------------------------
    1  |  0:00.00 |  3:37.72 |         0    |    16346
    2  |  3:37.72 |  4:41.20 |     16347    |    37441
    3  |  8:19.17 |  5:32.11 |     37442    |    62352
    4  | 13:51.28 |  4:04.48 |     62353    |    80700
    5  | 17:56.01 |  6:18.33 |     80701    |   109083
    6  | 24:14.34 |  5:00.66 |    109084    |   131649
    7  | 29:15.25 |  4:47.10 |    131650    |   153184
    8  | 34:02.35 |  4:52.50 |    153185    |   175134
    9  | 38:55.10 |  4:22.02 |    175135    |   194786
   10  | 43:17.12 |  4:07.47 |    194787    |   213358
   11  | 47:24.59 |  3:47.40 |    213359    |   230423
   12  | 51:12.24 |  4:16.09 |    230424    |   249632
   13  | 55:28.33 |  5:26.35 |    249633    |   274117
   14  | 60:54.68 |  5:21.19 |    274118    |   298211

Track 1
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\01. カクザトウ.wav

 Pre-gap length  0:00:02.00

 Peak level 95.2 %
 Extraction speed 7.1 X
 Track quality 100.0 %
 Test CRC 5B6D8A49
 Copy CRC 5B6D8A49
 Accurately ripped (confidence 23)  [5B52811C]  (AR v2)
 Copy OK

Track 2
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\02. ロミオとシンデレラ.wav

 Pre-gap length  0:00:01.36

 Peak level 100.0 %
 Extraction speed 8.3 X
 Track quality 100.0 %
 Test CRC E40C9396
 Copy CRC E40C9396
 Accurately ripped (confidence 24)  [2CFC096B]  (AR v2)
 Copy OK

Track 3
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\03. 歌に形はないけれど.wav

 Pre-gap length  0:00:02.36

 Peak level 97.7 %
 Extraction speed 8.6 X
 Track quality 100.0 %
 Test CRC F9131AE7
 Copy CRC F9131AE7
 Accurately ripped (confidence 24)  [309AEAAF]  (AR v2)
 Copy OK

Track 4
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\04. Shooting Star.wav

 Pre-gap length  0:00:02.36

 Peak level 100.0 %
 Extraction speed 9.8 X
 Track quality 100.0 %
 Test CRC 7A29C82B
 Copy CRC 7A29C82B
 Accurately ripped (confidence 24)  [7A696E69]  (AR v2)
 Copy OK

Track 5
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\05. 夕日坂.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 8.9 X
 Track quality 100.0 %
 Test CRC 7BD77CC3
 Copy CRC 7BD77CC3
 Accurately ripped (confidence 24)  [43D64D0F]  (AR v2)
 Copy OK

Track 6
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\06. Winter Alice.wav

 Pre-gap length  0:00:02.71

 Peak level 100.0 %
 Extraction speed 9.4 X
 Track quality 100.0 %
 Test CRC 1AA74D99
 Copy CRC 1AA74D99
 Accurately ripped (confidence 23)  [66AD2C30]  (AR v2)
 Copy OK

Track 7
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\07. キャットフード.wav

 Pre-gap length  0:00:01.72

 Peak level 100.0 %
 Extraction speed 8.0 X
 Track quality 99.9 %
 Test CRC 67C21FCB
 Copy CRC 67C21FCB
 Accurately ripped (confidence 23)  [9FFEB229]  (AR v2)
 Copy OK

Track 8
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\08. 飴か夢.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 10.0 X
 Track quality 100.0 %
 Test CRC A2E95F47
 Copy CRC A2E95F47
 Accurately ripped (confidence 23)  [9E0EB93C]  (AR v2)
 Copy OK

Track 9
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\09. 茜コントラスト.wav

 Pre-gap length  0:00:01.37

 Peak level 100.0 %
 Extraction speed 10.3 X
 Track quality 100.0 %
 Test CRC AB438991
 Copy CRC AB438991
 Accurately ripped (confidence 23)  [87E697B7]  (AR v2)
 Copy OK

Track 10
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\10. エトランゼ.wav

 Pre-gap length  0:00:02.01

 Peak level 96.2 %
 Extraction speed 9.0 X
 Track quality 99.9 %
 Test CRC 32E31D10
 Copy CRC 32E31D10
 Accurately ripped (confidence 23)  [49774466]  (AR v2)
 Copy OK

Track 11
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\11. モノクロアクト.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 11.0 X
 Track quality 100.0 %
 Test CRC 9FECC198
 Copy CRC 9FECC198
 Accurately ripped (confidence 24)  [A2468539]  (AR v2)
 Copy OK

Track 12
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\12. Reminiscence.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 10.8 X
 Track quality 100.0 %
 Test CRC E0435380
 Copy CRC E0435380
 Accurately ripped (confidence 23)  [48F9E26B]  (AR v2)
 Copy OK

Track 13
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\13. letter song.wav

 Pre-gap length  0:00:03.36

 Peak level 100.0 %
 Extraction speed 12.0 X
 Track quality 100.0 %
 Test CRC D00A3AF6
 Copy CRC D00A3AF6
 Accurately ripped (confidence 24)  [7D2617DB]  (AR v2)
 Copy OK

Track 14
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC]\14. bouquet.wav

 Pre-gap length  0:00:04.37

 Peak level 100.0 %
 Extraction speed 12.6 X
 Track quality 100.0 %
 Test CRC A701DB3C
 Copy CRC A701DB3C
 Accurately ripped (confidence 24)  [A5B4B8A1]  (AR v2)
 Copy OK

All tracks accurately ripped
No errors occurred
End of status report
—- CUETools DB Plugin V2.1.6
[CTDB TOCID: nUCM027l5Iece4glQ4I_rVg_95E-] found
Submit result: nUCM027l5Iece4glQ4I_rVg_95E- has been confirmed
Track | CTDB Status
1 | (91/93) Accurately ripped
2 | (91/93) Accurately ripped
3 | (91/93) Accurately ripped
4 | (91/93) Accurately ripped
5 | (91/93) Accurately ripped
6 | (90/93) Accurately ripped
7 | (90/93) Accurately ripped
8 | (90/93) Accurately ripped
9 | (91/93) Accurately ripped
10 | (91/93) Accurately ripped
11 | (91/93) Accurately ripped
12 | (91/93) Accurately ripped
13 | (90/93) Accurately ripped
14 | (93/93) Accurately ripped
==== Log checksum B4280693B3F5AC6BEFC6996A6E1D12C437DA8B0A0659528C0D1A758CE4FF6644 ====

Overread turns off

Exact Audio Copy V1.3 from 2. September 2016
EAC extraction logfile from 25. July 2020, 17:56
doriko feat. 初音ミク / 花束
Used drive : ATAPI CDRW 52X32 Adapter: 1 ID: 0
Read mode : Secure
Utilize accurate stream : Yes
Defeat audio cache : Yes
Make use of C2 pointers : No
Read offset correction : 738
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
Gap handling : Appended to previous track
Used output format : User Defined Encoder
Selected bitrate : 1024 kBit/s
Quality : High
Add ID3 tag : No
Command line compressor : D:\Tools\FLAC\flac.exe
Additional command line options : -8 -e -p -V -T “ARTIST=%artist%” -T “TITLE=%title%” -T “ALBUM=%albumtitle%” -T “DATE=%year%” -T “TRACKNUMBER=%tracknr%” -T “GENRE=%genre%” -T “COMMENT=%comment%” -T “BAND=%albuminterpret%” -T “ALBUMARTIST=%albuminterpret%” -T “COMPOSER=%composer%” %haslyrics%–tag-from-file=LYRICS="%lyricsfile%"%haslyrics% -T “DISCNUMBER=%cdnumber%” -T “TOTALDISCS=%totalcds%” -T “TOTALTRACKS=%numtracks%” %hascover%–picture="%coverfile%"%hascover% %source% -o %dest%
TOC of the extracted CD
 Track |   Start  |  Length  | Start sector | End sector
---------------------------------------------------------
    1  |  0:00.00 |  3:37.72 |         0    |    16346
    2  |  3:37.72 |  4:41.20 |     16347    |    37441
    3  |  8:19.17 |  5:32.11 |     37442    |    62352
    4  | 13:51.28 |  4:04.48 |     62353    |    80700
    5  | 17:56.01 |  6:18.33 |     80701    |   109083
    6  | 24:14.34 |  5:00.66 |    109084    |   131649
    7  | 29:15.25 |  4:47.10 |    131650    |   153184
    8  | 34:02.35 |  4:52.50 |    153185    |   175134
    9  | 38:55.10 |  4:22.02 |    175135    |   194786
   10  | 43:17.12 |  4:07.47 |    194787    |   213358
   11  | 47:24.59 |  3:47.40 |    213359    |   230423
   12  | 51:12.24 |  4:16.09 |    230424    |   249632
   13  | 55:28.33 |  5:26.35 |    249633    |   274117
   14  | 60:54.68 |  5:21.19 |    274118    |   298211

Track 1
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\01. カクザトウ.wav

 Pre-gap length  0:00:02.00

 Peak level 95.2 %
 Extraction speed 6.8 X
 Track quality 100.0 %
 Test CRC 5B6D8A49
 Copy CRC 5B6D8A49
 Accurately ripped (confidence 23)  [5B52811C]  (AR v2)
 Copy OK

Track 2
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\02. ロミオとシンデレラ.wav

 Pre-gap length  0:00:01.36

 Peak level 100.0 %
 Extraction speed 6.7 X
 Track quality 100.0 %
 Test CRC E40C9396
 Copy CRC E40C9396
 Accurately ripped (confidence 24)  [2CFC096B]  (AR v2)
 Copy OK

Track 3
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\03. 歌に形はないけれど.wav

 Pre-gap length  0:00:02.36

 Peak level 97.7 %
 Extraction speed 7.4 X
 Track quality 100.0 %
 Test CRC F9131AE7
 Copy CRC F9131AE7
 Accurately ripped (confidence 24)  [309AEAAF]  (AR v2)
 Copy OK

Track 4
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\04. Shooting Star.wav

 Pre-gap length  0:00:02.36

 Peak level 100.0 %
 Extraction speed 8.9 X
 Track quality 100.0 %
 Test CRC 7A29C82B
 Copy CRC 7A29C82B
 Accurately ripped (confidence 24)  [7A696E69]  (AR v2)
 Copy OK

Track 5
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\05. 夕日坂.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 8.4 X
 Track quality 100.0 %
 Test CRC 7BD77CC3
 Copy CRC 7BD77CC3
 Accurately ripped (confidence 24)  [43D64D0F]  (AR v2)
 Copy OK

Track 6
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\06. Winter Alice.wav

 Pre-gap length  0:00:02.71

 Peak level 100.0 %
 Extraction speed 10.2 X
 Track quality 100.0 %
 Test CRC 1AA74D99
 Copy CRC 1AA74D99
 Accurately ripped (confidence 23)  [66AD2C30]  (AR v2)
 Copy OK

Track 7
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\07. キャットフード.wav

 Pre-gap length  0:00:01.72

 Peak level 100.0 %
 Extraction speed 8.8 X
 Track quality 99.9 %
 Test CRC 67C21FCB
 Copy CRC 67C21FCB
 Accurately ripped (confidence 23)  [9FFEB229]  (AR v2)
 Copy OK

Track 8
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\08. 飴か夢.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 9.7 X
 Track quality 100.0 %
 Test CRC A2E95F47
 Copy CRC A2E95F47
 Accurately ripped (confidence 23)  [9E0EB93C]  (AR v2)
 Copy OK

Track 9
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\09. 茜コントラスト.wav

 Pre-gap length  0:00:01.37

 Peak level 100.0 %
 Extraction speed 10.8 X
 Track quality 100.0 %
 Test CRC AB438991
 Copy CRC AB438991
 Accurately ripped (confidence 23)  [87E697B7]  (AR v2)
 Copy OK

Track 10
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\10. エトランゼ.wav

 Pre-gap length  0:00:02.01

 Peak level 96.2 %
 Extraction speed 9.3 X
 Track quality 99.9 %
 Test CRC 32E31D10
 Copy CRC 32E31D10
 Accurately ripped (confidence 23)  [49774466]  (AR v2)
 Copy OK

Track 11
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\11. モノクロアクト.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 10.5 X
 Track quality 100.0 %
 Test CRC 9FECC198
 Copy CRC 9FECC198
 Accurately ripped (confidence 24)  [A2468539]  (AR v2)
 Copy OK

Track 12
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\12. Reminiscence.wav

 Pre-gap length  0:00:02.37

 Peak level 100.0 %
 Extraction speed 10.8 X
 Track quality 100.0 %
 Test CRC E0435380
 Copy CRC E0435380
 Accurately ripped (confidence 23)  [48F9E26B]  (AR v2)
 Copy OK

Track 13
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\13. letter song.wav

 Pre-gap length  0:00:03.36

 Peak level 100.0 %
 Extraction speed 11.3 X
 Track quality 100.0 %
 Test CRC D00A3AF6
 Copy CRC D00A3AF6
 Accurately ripped (confidence 24)  [7D2617DB]  (AR v2)
 Copy OK

Track 14
 Filename E:\EAC\doriko feat. 初音ミク - 花束 (2012) {dmARTS, DGSA-10031, CD} [FLAC] (对照组)\14. bouquet.wav

 Pre-gap length  0:00:04.37

 Peak level 100.0 %
 Extraction speed 11.8 X
 Track quality 100.0 %
 Test CRC 40696FCD
 Copy CRC 40696FCD
 Accurately ripped (confidence 24)  [A5B4B8A1]  (AR v2)
 Copy OK

All tracks accurately ripped
No errors occurred
End of status report
—- CUETools DB Plugin V2.1.6
[CTDB TOCID: nUCM027l5Iece4glQ4I_rVg_95E-] found
Submit result: already submitted
Track | CTDB Status
1 | (92/94) Accurately ripped
2 | (92/94) Accurately ripped
3 | (92/94) Accurately ripped
4 | (92/94) Accurately ripped
5 | (92/94) Accurately ripped
6 | (91/94) Accurately ripped
7 | (91/94) Accurately ripped
8 | (91/94) Accurately ripped
9 | (92/94) Accurately ripped
10 | (92/94) Accurately ripped
11 | (92/94) Accurately ripped
12 | (92/94) Accurately ripped
13 | (91/94) Accurately ripped
14 | (94/94) Accurately ripped
==== Log checksum FE54DD5585511333126756F230AF6E2054E4B72A92022318308279CF2A9D54D2 ====

When we opened overread, the CRC of the last track is A701DB3C; but if we closed overread, the CRC is 40696FCD. So the media data is different indeed, and their MD5 are B60D05BFA5474685DA7E491C67AF9BAC and 28DC4021FC14D5A274FB44E956B3F62A, but share the same AR CRC, which is A5B4B8A1. AccurateRip does ignore some samples when calculating the CRC. Here are two graphs zooming into 5:21.233~5:21.253 (around 882 samples) of the last track:

Overread turns on

Overread turns off

Look at the ordinate, it was enlarged a lot by me. The number on top and bottom used to be 0 (represent loudest), but they are only -72 now. That means the sound is too quiet that can’t be heard by a human. We may consider it as silence.

The results verified my hypothesis: if the drive doesn’t have overread ability or closed in EAC settings, then with the higher positive offset value, we are at risk of losing more samples on the tail. Unless the last part of the last track is pure silence. If it is, then turning overread on or off will make no difference:

Overread turns on

Exact Audio Copy V1.3 from 2. September 2016
EAC extraction logfile from 17. July 2020, 19:34
初音ミク vs 海賊王 × [TEST] / TwinTail・TwinGuitar
Used drive : ATAPI CDRW 52X32 Adapter: 1 ID: 0
Read mode : Secure
Utilize accurate stream : Yes
Defeat audio cache : Yes
Make use of C2 pointers : No
Read offset correction : 738
Overread into Lead-In and Lead-Out : Yes
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
Gap handling : Appended to previous track
Used output format : User Defined Encoder
Selected bitrate : 1024 kBit/s
Quality : High
Add ID3 tag : No
Command line compressor : D:\Tools\FLAC\flac.exe
Additional command line options : -8 -e -p -V -T “ARTIST=%artist%” -T “TITLE=%title%” -T “ALBUM=%albumtitle%” -T “DATE=%year%” -T “TRACKNUMBER=%tracknr%” -T “GENRE=%genre%” -T “COMMENT=%comment%” -T “BAND=%albuminterpret%” -T “ALBUMARTIST=%albuminterpret%” -T “COMPOSER=%composer%” %haslyrics%–tag-from-file=LYRICS="%lyricsfile%"%haslyrics% -T “DISCNUMBER=%cdnumber%” -T “TOTALDISCS=%totalcds%” -T “TOTALTRACKS=%numtracks%” %hascover%–picture="%coverfile%"%hascover% %source% -o %dest%
TOC of the extracted CD
 Track |   Start  |  Length  | Start sector | End sector
---------------------------------------------------------
    1  |  0:00.00 |  1:59.46 |         0    |     8970
    2  |  1:59.46 |  4:15.30 |      8971    |    28125
    3  |  6:15.01 |  3:35.28 |     28126    |    44278
    4  |  9:50.29 |  4:34.68 |     44279    |    64896
    5  | 14:25.22 |  4:30.37 |     64897    |    85183
    6  | 18:55.59 |  3:56.04 |     85184    |   102887
    7  | 22:51.63 |  3:21.41 |    102888    |   118003
    8  | 26:13.29 |  4:08.28 |    118004    |   136631
    9  | 30:21.57 |  3:56.45 |    136632    |   154376
   10  | 34:18.27 |  3:36.48 |    154377    |   170624
   11  | 37:55.00 |  3:51.65 |    170625    |   188014
   12  | 41:46.65 |  3:32.11 |    188015    |   203925
   13  | 45:19.01 |  4:27.14 |    203926    |   223964
   14  | 49:46.15 |  3:49.09 |    223965    |   241148
   15  | 53:35.24 |  2:40.44 |    241149    |   253192

Track 1
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\01. サーチライト.wav

 Pre-gap length  0:00:02.00

 Peak level 99.9 %
 Extraction speed 5.5 X
 Track quality 100.0 %
 Test CRC 26E55EDB
 Copy CRC 26E55EDB
 Cannot be verified as accurate (confidence 2)  [283D0E6D], AccurateRip returned [AF1182E2]  (AR v2)
 Copy OK

Track 2
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\02. 千本桜.wav

 Peak level 100.0 %
 Extraction speed 5.9 X
 Track quality 100.0 %
 Test CRC 9F6704CB
 Copy CRC 9F6704CB
 Cannot be verified as accurate (confidence 2)  [9A7E5B22], AccurateRip returned [08B20DB1]  (AR v2)
 Copy OK

Track 3
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\03. ローリンガール.wav

 Peak level 100.0 %
 Extraction speed 7.0 X
 Track quality 100.0 %
 Test CRC 2F6CDB2D
 Copy CRC 2F6CDB2D
 Cannot be verified as accurate (confidence 2)  [DFBAFD90], AccurateRip returned [4B1FF9FC]  (AR v2)
 Copy OK

Track 4
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\04. 凪.wav

 Peak level 99.8 %
 Extraction speed 6.3 X
 Track quality 99.9 %
 Test CRC E0403123
 Copy CRC E0403123
 Cannot be verified as accurate (confidence 2)  [FE5108AB], AccurateRip returned [C7B070DB]  (AR v2)
 Copy OK

Track 5
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\05. リンネ.wav

 Peak level 100.0 %
 Extraction speed 8.0 X
 Track quality 100.0 %
 Test CRC 579CC6C8
 Copy CRC 579CC6C8
 Cannot be verified as accurate (confidence 2)  [33EA473B], AccurateRip returned [F42826F6]  (AR v2)
 Copy OK

Track 6
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\06. 才能シュレッダー.wav

 Peak level 100.0 %
 Extraction speed 7.1 X
 Track quality 99.9 %
 Test CRC 7CDBDC20
 Copy CRC 7CDBDC20
 Cannot be verified as accurate (confidence 2)  [3A4F54CA], AccurateRip returned [5A3F153B]  (AR v2)
 Copy OK

Track 7
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\07. in your sight.wav

 Peak level 100.0 %
 Extraction speed 8.4 X
 Track quality 100.0 %
 Test CRC CBF1DE9B
 Copy CRC CBF1DE9B
 Cannot be verified as accurate (confidence 2)  [D634A50F], AccurateRip returned [DDBCB6B0]  (AR v2)
 Copy OK

Track 8
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\08. Fleeting Reality.wav

 Peak level 100.0 %
 Extraction speed 8.4 X
 Track quality 100.0 %
 Test CRC 886DCF16
 Copy CRC 886DCF16
 Cannot be verified as accurate (confidence 2)  [A3018C45], AccurateRip returned [39DDE9B5]  (AR v2)
 Copy OK

Track 9
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\09. アフターナイト ワンダーランド.wav

 Peak level 100.0 %
 Extraction speed 9.3 X
 Track quality 100.0 %
 Test CRC 268B0914
 Copy CRC 268B0914
 Cannot be verified as accurate (confidence 2)  [22DC3825], AccurateRip returned [8EE9757D]  (AR v2)
 Copy OK

Track 10
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\10. Pilot Dance.wav

 Peak level 100.0 %
 Extraction speed 9.6 X
 Track quality 100.0 %
 Test CRC 1060899E
 Copy CRC 1060899E
 Cannot be verified as accurate (confidence 2)  [DBE99417], AccurateRip returned [0AE0A6E7]  (AR v2)
 Copy OK

Track 11
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\11. 未来線.wav

 Peak level 100.0 %
 Extraction speed 9.4 X
 Track quality 100.0 %
 Test CRC AD3F56B9
 Copy CRC AD3F56B9
 Cannot be verified as accurate (confidence 2)  [DBA75975], AccurateRip returned [4E1C2C3F]  (AR v2)
 Copy OK

Track 12
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\12. FREE TIME.wav

 Peak level 100.0 %
 Extraction speed 8.1 X
 Track quality 99.9 %
 Test CRC 9AF1FF3D
 Copy CRC 9AF1FF3D
 Cannot be verified as accurate (confidence 2)  [9AA7B9BD], AccurateRip returned [A23DD2A1]  (AR v2)
 Copy OK

Track 13
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\13. brand-new stardust.wav

 Peak level 100.0 %
 Extraction speed 9.8 X
 Track quality 100.0 %
 Test CRC 20B879FC
 Copy CRC 20B879FC
 Cannot be verified as accurate (confidence 2)  [7307BD4A], AccurateRip returned [43F03E34]  (AR v2)
 Copy OK

Track 14
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\14. 千本桜 -Acoustic Ver.-.wav

 Peak level 99.6 %
 Extraction speed 10.1 X
 Track quality 100.0 %
 Test CRC AFBF8C52
 Copy CRC AFBF8C52
 Cannot be verified as accurate (confidence 2)  [AA3C4821], AccurateRip returned [E17B0866]  (AR v2)
 Copy OK

Track 15
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\15. アフターナイト ワンダーランド -Acoustic Ver.-.wav

 Peak level 100.0 %
 Extraction speed 10.2 X
 Track quality 100.0 %
 Test CRC 6C84B57C
 Copy CRC 6C84B57C
 Cannot be verified as accurate (confidence 2)  [3DCD203A], AccurateRip returned [92A7BD1F]  (AR v2)
 Copy OK

No tracks could be verified as accurate
You may have a different pressing from the one(s) in the database
No errors occurred
End of status report
—- CUETools DB Plugin V2.1.6
[CTDB TOCID: C2HPpRThYLN1zwCxxsdpLEQBCXY-] found
Submit result: C2HPpRThYLN1zwCxxsdpLEQBCXY- has been confirmed
Track | CTDB Status
1 | (5/5) Accurately ripped
2 | (5/5) Accurately ripped
3 | (5/5) Accurately ripped
4 | (5/5) Accurately ripped
5 | (5/5) Accurately ripped
6 | (5/5) Accurately ripped
7 | (5/5) Accurately ripped
8 | (5/5) Accurately ripped
9 | (5/5) Accurately ripped
10 | (5/5) Accurately ripped
11 | (5/5) Accurately ripped
12 | (5/5) Accurately ripped
13 | (5/5) Accurately ripped
14 | (5/5) Accurately ripped
15 | (5/5) Accurately ripped
==== Log checksum 99D2D491CE0AFB6C2448142400D117D1FA543AF9EF83EF9CD9B8A528E0C9929B ====

Overread turns off

Exact Audio Copy V1.3 from 2. September 2016
EAC extraction logfile from 17. July 2020, 20:07
初音ミク vs 海賊王 × [TEST] / TwinTail・TwinGuitar
Used drive : ATAPI CDRW 52X32 Adapter: 1 ID: 0
Read mode : Secure
Utilize accurate stream : Yes
Defeat audio cache : Yes
Make use of C2 pointers : No
Read offset correction : 738
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
Gap handling : Appended to previous track
Used output format : User Defined Encoder
Selected bitrate : 1024 kBit/s
Quality : High
Add ID3 tag : No
Command line compressor : D:\Tools\FLAC\flac.exe
Additional command line options : -8 -e -p -V -T “ARTIST=%artist%” -T “TITLE=%title%” -T “ALBUM=%albumtitle%” -T “DATE=%year%” -T “TRACKNUMBER=%tracknr%” -T “GENRE=%genre%” -T “COMMENT=%comment%” -T “BAND=%albuminterpret%” -T “ALBUMARTIST=%albuminterpret%” -T “COMPOSER=%composer%” %haslyrics%–tag-from-file=LYRICS="%lyricsfile%"%haslyrics% -T “DISCNUMBER=%cdnumber%” -T “TOTALDISCS=%totalcds%” -T “TOTALTRACKS=%numtracks%” %hascover%–picture="%coverfile%"%hascover% %source% -o %dest%
TOC of the extracted CD
 Track |   Start  |  Length  | Start sector | End sector
---------------------------------------------------------
    1  |  0:00.00 |  1:59.46 |         0    |     8970
    2  |  1:59.46 |  4:15.30 |      8971    |    28125
    3  |  6:15.01 |  3:35.28 |     28126    |    44278
    4  |  9:50.29 |  4:34.68 |     44279    |    64896
    5  | 14:25.22 |  4:30.37 |     64897    |    85183
    6  | 18:55.59 |  3:56.04 |     85184    |   102887
    7  | 22:51.63 |  3:21.41 |    102888    |   118003
    8  | 26:13.29 |  4:08.28 |    118004    |   136631
    9  | 30:21.57 |  3:56.45 |    136632    |   154376
   10  | 34:18.27 |  3:36.48 |    154377    |   170624
   11  | 37:55.00 |  3:51.65 |    170625    |   188014
   12  | 41:46.65 |  3:32.11 |    188015    |   203925
   13  | 45:19.01 |  4:27.14 |    203926    |   223964
   14  | 49:46.15 |  3:49.09 |    223965    |   241148
   15  | 53:35.24 |  2:40.44 |    241149    |   253192

Track 1
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\01. サーチライト.wav

 Pre-gap length  0:00:02.00

 Peak level 99.9 %
 Extraction speed 3.5 X
 Track quality 100.0 %
 Test CRC 26E55EDB
 Copy CRC 26E55EDB
 Cannot be verified as accurate (confidence 2)  [283D0E6D], AccurateRip returned [AF1182E2]  (AR v2)
 Copy OK

Track 2
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\02. 千本桜.wav

 Peak level 100.0 %
 Extraction speed 3.5 X
 Track quality 100.0 %
 Test CRC 9F6704CB
 Copy CRC 9F6704CB
 Cannot be verified as accurate (confidence 2)  [9A7E5B22], AccurateRip returned [08B20DB1]  (AR v2)
 Copy OK

Track 3
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\03. ローリンガール.wav

 Peak level 100.0 %
 Extraction speed 3.7 X
 Track quality 100.0 %
 Test CRC 2F6CDB2D
 Copy CRC 2F6CDB2D
 Cannot be verified as accurate (confidence 2)  [DFBAFD90], AccurateRip returned [4B1FF9FC]  (AR v2)
 Copy OK

Track 4
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\04. 凪.wav

 Peak level 99.8 %
 Extraction speed 3.9 X
 Track quality 99.9 %
 Test CRC E0403123
 Copy CRC E0403123
 Cannot be verified as accurate (confidence 2)  [FE5108AB], AccurateRip returned [C7B070DB]  (AR v2)
 Copy OK

Track 5
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\05. リンネ.wav

 Peak level 100.0 %
 Extraction speed 4.2 X
 Track quality 100.0 %
 Test CRC 579CC6C8
 Copy CRC 579CC6C8
 Cannot be verified as accurate (confidence 2)  [33EA473B], AccurateRip returned [F42826F6]  (AR v2)
 Copy OK

Track 6
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\06. 才能シュレッダー.wav

 Peak level 100.0 %
 Extraction speed 3.9 X
 Track quality 99.9 %
 Test CRC 7CDBDC20
 Copy CRC 7CDBDC20
 Cannot be verified as accurate (confidence 2)  [3A4F54CA], AccurateRip returned [5A3F153B]  (AR v2)
 Copy OK

Track 7
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\07. in your sight.wav

 Peak level 100.0 %
 Extraction speed 4.4 X
 Track quality 100.0 %
 Test CRC CBF1DE9B
 Copy CRC CBF1DE9B
 Cannot be verified as accurate (confidence 2)  [D634A50F], AccurateRip returned [DDBCB6B0]  (AR v2)
 Copy OK

Track 8
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\08. Fleeting Reality.wav

 Peak level 100.0 %
 Extraction speed 4.2 X
 Track quality 100.0 %
 Test CRC 886DCF16
 Copy CRC 886DCF16
 Cannot be verified as accurate (confidence 2)  [A3018C45], AccurateRip returned [39DDE9B5]  (AR v2)
 Copy OK

Track 9
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\09. アフターナイト ワンダーランド.wav

 Peak level 100.0 %
 Extraction speed 5.3 X
 Track quality 100.0 %
 Test CRC 268B0914
 Copy CRC 268B0914
 Cannot be verified as accurate (confidence 2)  [22DC3825], AccurateRip returned [8EE9757D]  (AR v2)
 Copy OK

Track 10
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\10. Pilot Dance.wav

 Peak level 100.0 %
 Extraction speed 3.4 X
 Track quality 100.0 %
 Test CRC 1060899E
 Copy CRC 1060899E
 Cannot be verified as accurate (confidence 2)  [DBE99417], AccurateRip returned [0AE0A6E7]  (AR v2)
 Copy OK

Track 11
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\11. 未来線.wav

 Peak level 100.0 %
 Extraction speed 3.7 X
 Track quality 100.0 %
 Test CRC AD3F56B9
 Copy CRC AD3F56B9
 Cannot be verified as accurate (confidence 2)  [DBA75975], AccurateRip returned [4E1C2C3F]  (AR v2)
 Copy OK

Track 12
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\12. FREE TIME.wav

 Peak level 100.0 %
 Extraction speed 3.0 X
 Track quality 99.9 %
 Test CRC 9AF1FF3D
 Copy CRC 9AF1FF3D
 Cannot be verified as accurate (confidence 2)  [9AA7B9BD], AccurateRip returned [A23DD2A1]  (AR v2)
 Copy OK

Track 13
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\13. brand-new stardust.wav

 Peak level 100.0 %
 Extraction speed 3.8 X
 Track quality 100.0 %
 Test CRC 20B879FC
 Copy CRC 20B879FC
 Cannot be verified as accurate (confidence 2)  [7307BD4A], AccurateRip returned [43F03E34]  (AR v2)
 Copy OK

Track 14
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\14. 千本桜 -Acoustic Ver.-.wav

 Peak level 99.6 %
 Extraction speed 4.5 X
 Track quality 100.0 %
 Test CRC AFBF8C52
 Copy CRC AFBF8C52
 Cannot be verified as accurate (confidence 2)  [AA3C4821], AccurateRip returned [E17B0866]  (AR v2)
 Copy OK

Track 15
 Filename E:\EAC\初音ミク vs 海賊王 × [TEST] - TwinTail・TwinGuitar (2012) {Royal Records, YZSM-10003, CD} [FLAC]\15. アフターナイト ワンダーランド -Acoustic Ver.-.wav

 Peak level 100.0 %
 Extraction speed 3.4 X
 Track quality 100.0 %
 Test CRC 6C84B57C
 Copy CRC 6C84B57C
 Cannot be verified as accurate (confidence 2)  [3DCD203A], AccurateRip returned [92A7BD1F]  (AR v2)
 Copy OK

No tracks could be verified as accurate
You may have a different pressing from the one(s) in the database
No errors occurred
End of status report
—- CUETools DB Plugin V2.1.6
[CTDB TOCID: C2HPpRThYLN1zwCxxsdpLEQBCXY-] found
Submit result: already submitted
Track | CTDB Status
1 | (6/6) Accurately ripped
2 | (6/6) Accurately ripped
3 | (6/6) Accurately ripped
4 | (6/6) Accurately ripped
5 | (6/6) Accurately ripped
6 | (6/6) Accurately ripped
7 | (6/6) Accurately ripped
8 | (6/6) Accurately ripped
9 | (6/6) Accurately ripped
10 | (6/6) Accurately ripped
11 | (6/6) Accurately ripped
12 | (6/6) Accurately ripped
13 | (6/6) Accurately ripped
14 | (6/6) Accurately ripped
15 | (6/6) Accurately ripped
==== Log checksum 393E54DEFC68D5F817B1C0A14F36ADE00AE205382B4C814F585FD8B5511E5F18 ====

Conclusion

So, is overread ability or turning it on important? The answer is no, here are the reasons:

ARDB and CTDB can avoid this problem at first;
Some CDs own pure silence in this area, so turning on and off are the same;
Even there does exist data difference, considering its loudness and duration, we humans can not feel it.