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Canít get same CRC when I burn/re-rip it. Due to absence of cue-sheet?, Was: Rip, Burn, Rip and CRC (TOS #6/unclear)
eahm
post Feb 11 2012, 19:29
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Hello again guys, I must ask another question again even though only few hours passed from my previous one.

I've did may simple test and none of them worked, I may know why it still not working but I need to hear from an expert.

Here's my problem:

Original CD Audio -> Rip to FLAC = Correct rip with AccurateRip. When I calculate the CRC/MD5 with dBpoweramp it gives me the same CRC for every lossless rip test I do with that very same track.

It seems though that I can't get the same CRC when I burn the track and re rip it. 1) Is my problem the absence of CUE files? 2) Does the track re rip correctly only if I burn it from the CUE file? 3) Is there a way to make a perfect burn without the CUE file? I've tried every possible burning software, burrrn, dBpoweramp, EAC etc.

Thank you again guys.
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eahm
post Feb 12 2012, 19:36
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QUOTE (pdq @ Feb 12 2012, 06:06) *
You should really stop relying on CRC. If even a single bit is different the CRCs will be completely different, so this is no indication of how different they are.

I haven't used EAC in several years myself, but someone here will tell you how to compare the two WAV files to find out exactly how they differ and whether or not it matters.

Sorry, I don't accept anything less than perfect. I own two IT companies (support and mobile developing) and build big networks, if I think like that the connection goes down every day. In my opinion, no one is wrong it's just how I am, things must be 100% accurate, no excuses.

QUOTE (Bugs.Bunny @ Feb 12 2012, 07:05) *
If you do want a bit exact copy you will need 2 things:
1) A drive that can read into lead-in/-out (eg. older Plextor drives)
2) A drive that has got a write offset of 0 (eg. many LG drives - I use a newer LG BD drive for exanple)
As far as I know there has never existed a drive that could read into lead-in/-out and had a write offset of 0. So you will need two different drives. One for reading and one for writing. Although drives that can read into lead-in/-out nowadays are probably harder to find.

I do use an older Plextor drive with accurate rip software for reading and EAC for writing.
If I re-rip a copy, the copy is 100% bit identical to the original rip.

My Pioneer DVR-219LBK is perfect, I don't mind changing the Write Offset, I just need info about these three questions so I don't keep wasting CD-Rs for nothing smile.gif

Thanks for the info.

This post has been edited by eahm: Feb 12 2012, 20:01
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Posts in this topic
- eahm   Canít get same CRC when I burn/re-rip it. Due to absence of cue-sheet?   Feb 11 2012, 19:29
- - psycho   Your problem comes from reading and more important...   Feb 11 2012, 19:36
- - eahm   I thought the CUE file was going to be the problem...   Feb 11 2012, 20:01
- - eahm   I am reading this guide http://blowfish.be/eac/Bur...   Feb 11 2012, 20:20
- - pdq   It would make more sense to compare the audio data...   Feb 11 2012, 20:55
- - eahm   What do you mean? That WAV Compare test I did is f...   Feb 11 2012, 21:02
- - pdq   Sorry, I only saw your mention of CRC and didn...   Feb 11 2012, 22:07
- - eahm   Please look at the attached screenshots, there is ...   Feb 11 2012, 23:23
- - eahm   You've got to be kidding me. The write offset ...   Feb 12 2012, 04:55
- - eahm   I did calculate the write offset and it supposed t...   Feb 12 2012, 06:53
- - pdq   You should really stop relying on CRC. If even a s...   Feb 12 2012, 14:06
- - Bugs.Bunny   If you do want a bit exact copy you will need 2 th...   Feb 12 2012, 15:05
- - eahm   QUOTE (pdq @ Feb 12 2012, 06:06) You shou...   Feb 12 2012, 19:36
- - pdq   Your CRCs don't match. You don't know why ...   Feb 13 2012, 05:09
- - eahm   QUOTE (pdq @ Feb 12 2012, 21:09) Your CRC...   Feb 13 2012, 06:59
- - pdq   Open EAC, click on Tools->Compare WAVs, select ...   Feb 13 2012, 18:12
- - JunkieXL   I have done the same thing you are testing. I was...   Feb 13 2012, 19:07
- - eahm   QUOTE (pdq @ Feb 13 2012, 10:12) Open EAC...   Feb 13 2012, 19:48
|- - psycho   QUOTE (eahm @ Feb 13 2012, 19:48) ...I wa...   Feb 16 2012, 18:43
|- - psycho   QUOTE (eahm @ Feb 13 2012, 19:48) Again, ...   Feb 16 2012, 19:07
- - pdq   Are the six missing samples at the beginning or th...   Feb 13 2012, 19:59
- - eahm   QUOTE (pdq @ Feb 13 2012, 11:59) Are the ...   Feb 13 2012, 20:14
- - pdq   The example shows the missing samples to be at the...   Feb 13 2012, 20:28
- - Bugs.Bunny   Offset (read or write) results in loosing some dat...   Feb 13 2012, 21:32
- - pablogm123   "There are (as far as I know) no drives with ...   Feb 16 2012, 11:17
- - db1989   That depends. If one follows the meticulously hard...   Feb 16 2012, 11:26
- - eahm   QUOTE (db1989 @ Feb 16 2012, 03:26) That ...   Feb 16 2012, 18:38
- - greynol   I'm pretty certain the answer to your question...   Feb 16 2012, 18:41
- - greynol   ...or you can burn an offset test CD with the writ...   Feb 16 2012, 18:57


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