EAC says last track’s quality=100%, but AccurateRip couldn’t verify it, [TOS #6: was “Weird AccurateRip result”] Options

[audiomunky]

Hey there,

I was using my Plextor external USB drive to rip "Classical Hits" with EAC yesterday when something weird happened. The rip seemed to go fine (just like most of my rips do), but when I checked the log for AccurateRip I noticed that the last track couldn't be verified as accurate. What was strange was the track quality was 100% and test / copy CRCs matched. Another thing: if you notice, it's AR v2 and not AR v1 like the rest of the CD. Any ideas why this could have happened? Thanks in advance.

CODE

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

EAC extraction logfile from 14. January 2013, 23:40

Various Artists / Classical Hits

Used drive : PLEXTOR DVDR PX-708A Adapter: 1 ID: 0

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

Read offset correction : 30
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 : 224 kBit/s
Quality : High
Add ID3 tag : No
Command line compressor : C:\lame3.99.5\lame.exe
Additional command line options : -V2 --add-id3v2 --tt "%title%" --ta "%artist%" --tl "%albumtitle%" --ty "%year%" --tn "%tracknr%" --tg "%genre%" %source% %dest%


TOC of the extracted CD

Track | Start | Length | Start sector | End sector
---------------------------------------------------------
1 | 0:00.00 | 3:27.15 | 0 | 15539
2 | 3:27.15 | 4:43.47 | 15540 | 36811
3 | 8:10.62 | 4:16.38 | 36812 | 56049
4 | 12:27.25 | 3:33.70 | 56050 | 72094
5 | 16:01.20 | 2:57.10 | 72095 | 85379
6 | 18:58.30 | 4:31.10 | 85380 | 105714
7 | 23:29.40 | 5:09.32 | 105715 | 128921
8 | 28:38.72 | 2:53.65 | 128922 | 141961
9 | 31:32.62 | 2:46.23 | 141962 | 154434
10 | 34:19.10 | 2:33.20 | 154435 | 165929
11 | 36:52.30 | 3:46.50 | 165930 | 182929
12 | 40:39.05 | 3:44.15 | 182930 | 199744
13 | 44:23.20 | 4:22.07 | 199745 | 219401
14 | 48:45.27 | 3:01.13 | 219402 | 232989
15 | 51:46.40 | 2:39.30 | 232990 | 244944
16 | 54:25.70 | 2:53.72 | 244945 | 257991
17 | 57:19.67 | 2:55.13 | 257992 | 271129
18 | 60:15.05 | 3:14.27 | 271130 | 285706
19 | 63:29.32 | 5:50.60 | 285707 | 312016
20 | 69:20.17 | 2:56.63 | 312017 | 325279


Track 1

Filename C:\Rips\Various Artists\Classical Hits\01 Pie Jesu.wav

Pre-gap length 0:00:02.00

Peak level 42.3 %
Extraction speed 4.0 X
Track quality 100.0 %
Test CRC C8A71C74
Copy CRC C8A71C74
Accurately ripped (confidence 3) [96317B69] (AR v1)
Copy OK

Track 2

Filename C:\Rips\Various Artists\Classical Hits\02 Victory.wav

Pre-gap length 0:00:01.70

Peak level 39.4 %
Extraction speed 4.6 X
Track quality 100.0 %
Test CRC 2840931A
Copy CRC 2840931A
Accurately ripped (confidence 3) [B6BAAF6E] (AR v1)
Copy OK

Track 3

Filename C:\Rips\Various Artists\Classical Hits\03 Duel of the Fates (From Star Wars Episode 1- The Phantom Menace).wav

Pre-gap length 0:00:03.27

Peak level 99.9 %
Extraction speed 5.0 X
Track quality 100.0 %
Test CRC 2AF4245F
Copy CRC 2AF4245F
Accurately ripped (confidence 3) [AF9DDA43] (AR v1)
Copy OK

Track 4

Filename C:\Rips\Various Artists\Classical Hits\04 Wishing You Were Somehow Here Again (From Phantom of the Opera).wav

Pre-gap length 0:00:02.45

Peak level 67.8 %
Extraction speed 5.2 X
Track quality 100.0 %
Test CRC DB3080B8
Copy CRC DB3080B8
Accurately ripped (confidence 3) [A63DDA60] (AR v1)
Copy OK

Track 5

Filename C:\Rips\Various Artists\Classical Hits\05 Rose (From Titanic).wav

Pre-gap length 0:00:04.10

Peak level 36.9 %
Extraction speed 5.2 X
Track quality 100.0 %
Test CRC D7E04F23
Copy CRC D7E04F23
Accurately ripped (confidence 3) [7C998CEC] (AR v1)
Copy OK

Track 6

Filename C:\Rips\Various Artists\Classical Hits\06 Nella fantasia.wav

Pre-gap length 0:00:04.73

Peak level 38.2 %
Extraction speed 5.9 X
Track quality 100.0 %
Test CRC EAD4ADCC
Copy CRC EAD4ADCC
Accurately ripped (confidence 3) [F25141CA] (AR v1)
Copy OK

Track 7

Filename C:\Rips\Various Artists\Classical Hits\07 Pavane.wav

Pre-gap length 0:00:03.68

Peak level 63.7 %
Extraction speed 5.4 X
Track quality 99.9 %
Test CRC 51E40C54
Copy CRC 51E40C54
Accurately ripped (confidence 3) [2375B3C8] (AR v1)
Copy OK

Track 8

Filename C:\Rips\Various Artists\Classical Hits\08 O mio babbino caro.wav

Pre-gap length 0:00:03.57

Peak level 100.0 %
Extraction speed 6.0 X
Track quality 100.0 %
Test CRC 0B17DDDD
Copy CRC 0B17DDDD
Accurately ripped (confidence 3) [D3C02F6C] (AR v1)
Copy OK

Track 9

Filename C:\Rips\Various Artists\Classical Hits\09 Jesu, Joy of Man's Desiring.wav

Pre-gap length 0:00:04.40

Peak level 40.5 %
Extraction speed 4.7 X
Track quality 99.9 %
Test CRC 527D23AC
Copy CRC 527D23AC
Accurately ripped (confidence 3) [17F43F3A] (AR v1)
Copy OK

Track 10

Filename C:\Rips\Various Artists\Classical Hits\10 'O sole mio.wav

Pre-gap length 0:00:04.73

Peak level 75.4 %
Extraction speed 6.3 X
Track quality 100.0 %
Test CRC EB1D6643
Copy CRC EB1D6643
Accurately ripped (confidence 3) [9058872D] (AR v1)
Copy OK

Track 11

Filename C:\Rips\Various Artists\Classical Hits\11 Maria (From West Side Story Suite).wav

Pre-gap length 0:00:03.60

Peak level 98.8 %
Extraction speed 6.8 X
Track quality 100.0 %
Test CRC FC41AE48
Copy CRC FC41AE48
Accurately ripped (confidence 3) [ECD84766] (AR v1)
Copy OK

Track 12

Filename C:\Rips\Various Artists\Classical Hits\12 The Second Waltz.wav

Pre-gap length 0:00:01.43

Peak level 77.6 %
Extraction speed 7.0 X
Track quality 100.0 %
Test CRC 62F688A4
Copy CRC 62F688A4
Accurately ripped (confidence 3) [0F44A409] (AR v1)
Copy OK

Track 13

Filename C:\Rips\Various Artists\Classical Hits\13 Now We Are Free (From Gladiator).wav

Pre-gap length 0:00:03.20

Peak level 56.2 %
Extraction speed 7.5 X
Track quality 100.0 %
Test CRC 15D2A292
Copy CRC 15D2A292
Accurately ripped (confidence 3) [313E1FD6] (AR v1)
Copy OK

Track 14

Filename C:\Rips\Various Artists\Classical Hits\14 The Eternal Vow (From Crouching Tiger, Hidden Dragon).wav

Pre-gap length 0:00:03.27

Peak level 60.7 %
Extraction speed 7.3 X
Track quality 100.0 %
Test CRC C834BA62
Copy CRC C834BA62
Accurately ripped (confidence 3) [2A72ECE7] (AR v1)
Copy OK

Track 15

Filename C:\Rips\Various Artists\Classical Hits\15 O Fortuna (From Carmina Burana).wav

Pre-gap length 0:00:03.43

Peak level 100.0 %
Extraction speed 7.3 X
Track quality 100.0 %
Test CRC BD23F3A6
Copy CRC BD23F3A6
Accurately ripped (confidence 3) [DAD32CF3] (AR v1)
Copy OK

Track 16

Filename C:\Rips\Various Artists\Classical Hits\16 Main Title (From Braveheart).wav

Pre-gap length 0:00:03.48

Peak level 37.7 %
Extraction speed 5.8 X
Track quality 99.9 %
Test CRC 66533F98
Copy CRC 66533F98
Accurately ripped (confidence 2) [1AEC0F01] (AR v1)
Copy OK

Track 17

Filename C:\Rips\Various Artists\Classical Hits\17 The Prince of Denmark's March.wav

Pre-gap length 0:00:04.42

Peak level 76.6 %
Extraction speed 7.7 X
Track quality 100.0 %
Test CRC 0CD3AE2D
Copy CRC 0CD3AE2D
Accurately ripped (confidence 2) [7C7997B6] (AR v1)
Copy OK

Track 18

Filename C:\Rips\Various Artists\Classical Hits\18 Spring (From The Four Seasons).wav

Pre-gap length 0:00:04.00

Peak level 69.7 %
Extraction speed 7.9 X
Track quality 100.0 %
Test CRC 3FCF24C4
Copy CRC 3FCF24C4
Accurately ripped (confidence 3) [1F2346B2] (AR v1)
Copy OK

Track 19

Filename C:\Rips\Various Artists\Classical Hits\19 Appalachia Waltz.wav

Pre-gap length 0:00:03.35

Peak level 33.6 %
Extraction speed 8.6 X
Track quality 100.0 %
Test CRC D0721770
Copy CRC D0721770
Accurately ripped (confidence 3) [F35C6534] (AR v1)
Copy OK

Track 20

Filename C:\Rips\Various Artists\Classical Hits\20 Nessun dorma!.wav

Pre-gap length 0:00:03.50

Peak level 89.1 %
Extraction speed 9.5 X
Track quality 100.0 %
Test CRC 112AFA6B
Copy CRC 112AFA6B
Cannot be verified as accurate (confidence 9) [22D0D879], AccurateRip returned [D69A8FDD] (AR v2)
Copy OK


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

Some tracks could not be verified as accurate

No errors occurred

End of status report

==== Log checksum 8D1E082C5CB6F285850E54EAD286D73C5FA967DF1579EB79FCE62A017F279BDB ====

[Rollin]

There can be many reasons.
One possible reason: This is last track and your drive can "overread". Most of drives can't overread. So maybe your rip is even more "accurate" than results in database.

[audiomunky]

One possible reason: This is last track and your drive can "overread". Most of drives can't overread. So maybe your rip is even more "accurate" than results in database.

Agreed Rollin, thanks. It's just interesting that AR tried to compare it to a different rip using AR v2 instead of AR v1...

[db1989]

From a few days ago, posts #9 and #10.

[audiomunky]

So you think the rip is bad then?

[greynol]

So you think the rip is bad then?

On the contrary, I think your rip is probably good and the hashes in the database for your specific pressing may be from errant rips that are consistent by virtue of a bug (read more below). Still, rip the tracks as lossless and let CUETools have a look at them. It may reduce the amount of blind speculation.

Most of drives can't overread. So maybe your rip is even more "accurate" than results in database.

AR ignores the last five frames of the last track, so this shouldn't be an issue.

That said, there are situations where EAC will repeat the last 1176 samples of non-null data (where the last non-null sample is the 1176th sample of the set, regardless of whether it falls on a frame boundary) when a drive that is configured as not being able to overread and those repeated samples may fall before the final five frames of the track, affecting the AR hash. Note this may explain some (most?) of Spoon's findings which he is attributing as being "more difficult to rip". These instances have to do with a bug in EAC; they have nothing to do with the disc being "difficult to rip". To my knowledge there is no mechanism in AR to catch this problem.

Perhaps before checking a lossless version against CUETools, I'd rip the last track again with overreading disabled and see what AR says. If it says the tracks are accurate then I'd say keep the ones done with the setting enabled. Personally I'd also compare lossless versions of each to see the differences for myself and to verify my suspicion about the submissions in the AR database being consistent errors due to defective software, but that's just me.

This post has been edited by greynol: Jan 16 2013, 04:02