Different CRC32

[PcNy]

I just tested ripping by using dBpoweramp CD Ripper and CUERipper.
Both I set offset to 48 and they confirmed that all tracks are ripped accurately.

The AccurateRip CRC from both dBpoweramp and CUERipper are the same.
But CRC32 (not AccurateRip's one) are different. Is this because the different encoder between two software? And if yes, there will be difference in sound between them? Because I'm not confidence even AccurateRip CRC are matched but CRC32 are not matched.

dBpoweramp CD Ripper's result

dBpoweramp Release 14 Digital Audio Extraction Log from 29 &*blooper*3648;&*blooper*3617;&*blooper*3625;&*blooper*3634;&*blooper*3618;&*blooper*3609; 2554 07:39 PM

Drive & Settings
----------------

Ripping with drive 'F:   [DTSOFT   - BDROM           ]',  Drive offset: 0,  Overread Lead-in/out: No
AccurateRip: Active,  Using C2: No,  Cache: 1024 KB,  FUA Cache Invalidate: No
Pass 1 Drive Speed: Max,  Pass 2 Drive Speed: Max
Ultra::  Vary Drive Speed: No,  Min Passes: 1,  Max Passes: 2,  Finish After Clean Passes: 1
Bad Sector Re-rip::  Drive Speed: Max,  Maximum Re-reads: 60

Encoder: FLAC -compression-level-5
DSP Effects / Actions: -dspeffect1="ReplayGain=-albummode={qt}0{qt}"

Extraction Log
--------------

Track 1:  Ripped LBA 0 to 16993 (3:46) in 0:00. Filename: C:\Users\Boy\Music\Singular\The White Room\01 Singular - 24.7.flac
  AccurateRip: Accurate (confidence 4)     [Pass 1]
  CRC32: CF827244     AccurateRip CRC: 96580A1C     [DiscID: 007-00077d5f-002d09da-48067107-1]
  AccurateRip Verified Using Pressing Offset +48, Confidence 4 [old crc 96580a1c]

Track 2:  Ripped LBA 16993 to 34541 (3:53) in 0:00. Filename: C:\Users\Boy\Music\Singular\The White Room\02 Singular - &*blooper*3621;&*blooper*3629;&*blooper*3591;.flac
  AccurateRip: Accurate (confidence 5)     [Pass 1]
  CRC32: 9E4069A2     AccurateRip CRC: 37706F07     [DiscID: 007-00077d5f-002d09da-48067107-2]
  AccurateRip Verified Using Pressing Offset +48, Confidence 5 [old crc 37706f07]

Track 3:  Ripped LBA 34541 to 52941 (4:05) in 0:00. Filename: C:\Users\Boy\Music\Singular\The White Room\03 Singular - &*blooper*3648;&*blooper*3610;&*blooper*3634; &*blooper*3648;&*blooper*3610;&*blooper*3634;.flac
  AccurateRip: Accurate (confidence 5)     [Pass 1]
  CRC32: 357E7E43     AccurateRip CRC: 3D13080C     [DiscID: 007-00077d5f-002d09da-48067107-3]
  AccurateRip Verified Using Pressing Offset +48, Confidence 5 [old crc 3d13080c]

Track 4:  Ripped LBA 52941 to 69216 (3:37) in 0:00. Filename: C:\Users\Boy\Music\Singular\The White Room\04 Singular - Game.flac
  AccurateRip: Accurate (confidence 5)     [Pass 1]
  CRC32: 58D9451E     AccurateRip CRC: B3FEF1EF     [DiscID: 007-00077d5f-002d09da-48067107-4]
  AccurateRip Verified Using Pressing Offset +48, Confidence 5 [old crc b3fef1ef]

Track 5:  Ripped LBA 69216 to 87631 (4:05) in 0:00. Filename: C:\Users\Boy\Music\Singular\The White Room\05 Singular - &*blooper*3629;&*blooper*3637;&*blooper*3585;&*blooper*3623;&*blooper*3633;&*blooper*3609;.flac
  AccurateRip: Accurate (confidence 5)     [Pass 1]
  CRC32: C8E4F133     AccurateRip CRC: 61F115A3     [DiscID: 007-00077d5f-002d09da-48067107-5]
  AccurateRip Verified Using Pressing Offset +48, Confidence 5 [old crc 61f115a3]

Track 6:  Ripped LBA 87631 to 105798 (4:02) in 0:01. Filename: C:\Users\Boy\Music\Singular\The White Room\06 Singular - Faded.flac
  AccurateRip: Accurate (confidence 5)     [Pass 1]
  CRC32: 80567E9C     AccurateRip CRC: 87BF611E     [DiscID: 007-00077d5f-002d09da-48067107-6]
  AccurateRip Verified Using Pressing Offset +48, Confidence 5 [old crc 87bf611e]

Track 7:  Ripped LBA 105798 to 123727 (3:59) in 0:01. Filename: C:\Users\Boy\Music\Singular\The White Room\07 Singular - 24.7 (Acoustic).flac
  AccurateRip: Accurate (confidence 5)     [Pass 1]
  CRC32: CFB1FCED     AccurateRip CRC: 4C3F6D89     [DiscID: 007-00077d5f-002d09da-48067107-7]
  AccurateRip Verified Using Pressing Offset +48, Confidence 5 [old crc 4c3f6d89]

--------------

7 Tracks Ripped Accurately

CUERipper's result

CUERipper v2.1.0 Copyright (C) 2008-10 Gregory S. Chudov

EAC extraction logfile from 29. April 2011, 19:32

Unknown Artist / Unknown Title

Used drive  : DTSOFT BDROM   Adapter: 1  ID: 0

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

Read offset correction                      : 48
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 : Internal WAV Routines
Sample format      : 44.100 Hz; 16 Bit; Stereo


TOC of the extracted CD

     Track |   Start  |  Length  | Start sector | End sector 
    ---------------------------------------------------------
        1  |  0:00.00 |  3:46.43 |         0    |    16992   
        2  |  3:46.43 |  3:53.73 |     16993    |    34540   
        3  |  7:40.41 |  4:05.25 |     34541    |    52940   
        4  | 11:45.66 |  3:37.00 |     52941    |    69215   
        5  | 15:22.66 |  4:05.40 |     69216    |    87630   
        6  | 19:28.31 |  4:02.17 |     87631    |   105797   
        7  | 23:30.48 |  3:59.04 |    105798    |   123726   


Track  1

     Filename C:\Users\Boy\Music\Unknown Artist\Unknown Title\01. Track 01.wav

     Pre-gap length  0:00:02.00

     Peak level 100.0 %
     Track quality 100.0 %
     Test CRC D8B0606D
     Copy CRC D8B0606D
     Accurately ripped (confidence 4)  [96580A1C]
     Copy OK

Track  2

     Filename C:\Users\Boy\Music\Unknown Artist\Unknown Title\02. Track 02.wav

     Peak level 99.4 %
     Track quality 100.0 %
     Test CRC 06673783
     Copy CRC 06673783
     Accurately ripped (confidence 5)  [37706F07]
     Copy OK

Track  3

     Filename C:\Users\Boy\Music\Unknown Artist\Unknown Title\03. Track 03.wav

     Peak level 99.9 %
     Track quality 100.0 %
     Test CRC 1A08C295
     Copy CRC 1A08C295
     Accurately ripped (confidence 5)  [3D13080C]
     Copy OK

Track  4

     Filename C:\Users\Boy\Music\Unknown Artist\Unknown Title\04. Track 04.wav

     Peak level 100.0 %
     Track quality 100.0 %
     Test CRC 10646840
     Copy CRC 10646840
     Accurately ripped (confidence 5)  [B3FEF1EF]
     Copy OK

Track  5

     Filename C:\Users\Boy\Music\Unknown Artist\Unknown Title\05. Track 05.wav

     Peak level 100.0 %
     Track quality 100.0 %
     Test CRC 80F759A5
     Copy CRC 80F759A5
     Accurately ripped (confidence 5)  [61F115A3]
     Copy OK

Track  6

     Filename C:\Users\Boy\Music\Unknown Artist\Unknown Title\06. Track 06.wav

     Peak level 98.5 %
     Track quality 100.0 %
     Test CRC DAF296BD
     Copy CRC DAF296BD
     Accurately ripped (confidence 5)  [87BF611E]
     Copy OK

Track  7

     Filename C:\Users\Boy\Music\Unknown Artist\Unknown Title\07. Track 07.wav

     Peak level 100.0 %
     Track quality 100.0 %
     Test CRC 39959834
     Copy CRC 39959834
     Accurately ripped (confidence 5)  [4C3F6D89]
     Copy OK


All tracks accurately ripped

No errors occurred

End of status report

for example, for track 1, AccurateRip CRC for both software are the same which is 96580A1C. But CRC32 are different, dBpoweramp's result gives CF827244 but CUERipper's result gives D8B0606D. :headbang:

[dbfan]

Re: Different CRC32

They might be calculating a different crc32, such as the whole file including Id tags, rather than just the audio.

[PcNy]

Re: Different CRC32

They might be calculating a different crc32, such as the whole file including Id tags, rather than just the audio.

I have used Calculate Audio CRC Utility from dBpoweramp. And they matched with the report. So I think CUERipper calculate audio CRC not the whole file. :blush:

dBpoweramp's output

CRC32		Filename

58D9451E	C:\Users\Boy\Music\Singular\The White Room\04 Singular - Game.flac
CF827244	C:\Users\Boy\Music\Singular\The White Room\01 Singular - 24.7.flac
9E4069A2	C:\Users\Boy\Music\Singular\The White Room\02 Singular - &*blooper*3621;&*blooper*3629;&*blooper*3591;.flac
357E7E43	C:\Users\Boy\Music\Singular\The White Room\03 Singular - &*blooper*3648;&*blooper*3610;&*blooper*3634; &*blooper*3648;&*blooper*3610;&*blooper*3634;.flac
CFB1FCED	C:\Users\Boy\Music\Singular\The White Room\07 Singular - 24.7 (Acoustic).flac
80567E9C	C:\Users\Boy\Music\Singular\The White Room\06 Singular - Faded.flac
C8E4F133	C:\Users\Boy\Music\Singular\The White Room\05 Singular - &*blooper*3629;&*blooper*3637;&*blooper*3585;&*blooper*3623;&*blooper*3633;&*blooper*3609;.flac

CUERipper's output

CRC32		Filename

10646840	C:\Users\Boy\Music\Unknown Artist\Unknown Title\04. Track 04.flac
D8B0606D	C:\Users\Boy\Music\Unknown Artist\Unknown Title\01. Track 01.flac
06673783	C:\Users\Boy\Music\Unknown Artist\Unknown Title\02. Track 02.flac
1A08C295	C:\Users\Boy\Music\Unknown Artist\Unknown Title\03. Track 03.flac
39959834	C:\Users\Boy\Music\Unknown Artist\Unknown Title\07. Track 07.flac
DAF296BD	C:\Users\Boy\Music\Unknown Artist\Unknown Title\06. Track 06.flac
80F759A5	C:\Users\Boy\Music\Unknown Artist\Unknown Title\05. Track 05.flac

[PcNy]

Re: Different CRC32

Both software said they've accurately ripped. But when I compare those CRC32, they are different. I don't know which one to choose. :blush:

[dbfan]

Re: Different CRC32

Try with Eac as well, then you have a 3rd to compare to.

[PcNy]

Re: Different CRC32

Well, setting up EAC is not easy for me. (That's why I choose dBpoweramp)
I tried to make AccurateRip to work for my emulated drive.
It said it need 3 more key discs to enable AccurateRip but I don't have 3 audio images for that :blush:

[PcNy]

Re: Different CRC32

I'm really confused which one is really accurately ripped :blush:

[Spoon]

Re: Different CRC32

Once you have EAC working you can compare.

[PcNy]

Re: Different CRC32

Once you have EAC working you can compare.

I didn't test with EAC due to some difficulties.
But I've tested with Foobar2000 with AccurateRip feature enabled.

I performed checksum the result from Foobar2000. CRC32, MD5, AccurateRip CRC are matched with CUERipper's output files.

I think dBpoweramp should not report as accurately ripped. The AccurateRip CRC from log file and Calculate Audio CRC utility are also different.

[Spoon]

Re: Different CRC32

> dBpoweramp's result gives CF827244 but CUERipper's result gives D8B0606D.

D8B0606D, where did this come from, Cueripper its self, or the [calculate audio crc]? (if not [calculate audio crc] then run it on the cueripper files)

>I think dBpoweramp should not report as accurately ripped.

Why not? the AccurateRip CRC is the same for all programs, you just need to find out why your testing methodolgy is giving different CRC results later on (FLAC has a built in MD5 of the uncompressed data which went into it, any corruption would show on decoding).

[PcNy]

Re: Different CRC32

> dBpoweramp's result gives CF827244 but CUERipper's result gives D8B0606D.

D8B0606D, where did this come from, Cueripper its self, or the [calculate audio crc]? (if not [calculate audio crc] then run it on the cueripper files)

All results are from Calculate Audio CRC utility.

[dbfan]

Re: Different CRC32

If you have no dsp effects in use then the data is saved exactly as ripped. Also with flac is an option to verify the written audio.

With cue ripper and footer you would have to make sure the correct drive offset is set