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Pregap not matching log file
LTP
post Jul 20 2013, 20:41
Post #1





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Member No.: 87155



Confession time. sad.gif
Despite buying 99.9% of my music, what with being an OCD nut and liking to know where me music comes from, I'm a bit of an Eels fan and greedily wanted a lossless copy of their super rare 1999 limited edition live album 'Oh What A Beautiful Morning' which I procured via downloading a complete Eels lossless discography from one of the usual illegal torrent sites (though only downloading that and the previous limited edition live album, the rest I have already anyway but I'm probably going to hell regardless and expecting a knock on the door from the CIA and FBI etc any second now but what can you do eh?).

Anyway, my question. Opening the cue in XLD the AccurateRip is confirming that yes it is indeed accurately ripped and running the verification the CRC hash XLD produced from that matches the log file that came with the album
Example:

Log
Track 17
Filename J:\<TOS#9>\Oh What A Beautiful Morning\17 - something is sacred.wav

Pre-gap length 0:00:02.84

Peak level 69.3 %
Track quality 100.0 %
Test CRC A5423407
Copy CRC A5423407
Copy OK

XLD Log
Track 17
Track gain : 0.92 dB
Peak : 0.693695
CRC32 hash : A5423407
CRC32 hash (skip zero) : 7061CF06
AccurateRip v1 signature : 960BEC56
AccurateRip v2 signature : D7AC9BCC
->Accurately ripped (v1, confidence 19/19)

My question is that checking the log I noticed the pre-gap length stated in the log for track 17 was 0:00:02.84 while the album listed in XLD is saying 0:00:02.63. Checking further I noticed that none of the other tracks pre gaps matched what was on the log, varying from a couple of seconds to over twenty. So what would cause this discrepancy?
As I generally rip all my albums myself and generally don't do this kinda downloading thing normally I have never checked to see whether all my hundreds of ripped CD's pregaps have matched the logs but I'm assuming they would do? Why wouldn't they?

I asked a mate who normally downloads shit and after laughing at my blatant OCD headache plus my somewhat download naivety for 10 minutes or so checked some of his Flac downloads and said a few didn't match there as well but didn't care enough to find out any more, so I turn to you oh knowledgable people. Why would the pregap be different when the log says otherwise even though XLD is still saying it's an accurate rip and is this something I need to worry about for my own rips? blink.gif

This post has been edited by greynol: Jul 23 2013, 14:45
Reason for edit: Removed reference in path per TOS9. You can be banned for this.
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Posts in this topic
- LTP   Pregap not matching log file   Jul 20 2013, 20:41
- - greynol   First off, 75 frames = 1 second. Secondly, differ...   Jul 20 2013, 21:18
|- - LTP   QUOTE (greynol @ Jul 20 2013, 21:18) Firs...   Jul 21 2013, 09:41
||- - mjb2006   QUOTE (LTP @ Jul 21 2013, 02:41) Basicall...   Jul 22 2013, 01:25
||- - greynol   QUOTE (mjb2006 @ Jul 21 2013, 17:25) inde...   Jul 22 2013, 06:59
||- - LTP   QUOTE (mjb2006 @ Jul 22 2013, 01:25) QUOT...   Jul 22 2013, 12:15
|- - db1989   I’m not sure why you’re so baffled whe...   Jul 21 2013, 15:16
|- - LTP   QUOTE (db1989 @ Jul 21 2013, 15:16) Altho...   Jul 21 2013, 15:39
|- - lvqcl   QUOTE (LTP @ Jul 21 2013, 18:39) I can te...   Jul 21 2013, 16:33
- - lvqcl   QUOTE while the album listed in XLD is saying 0:00...   Jul 21 2013, 09:44
|- - LTP   QUOTE (lvqcl @ Jul 21 2013, 09:44) QUOTE ...   Jul 21 2013, 11:03
- - LTP   And I'm still confused, quick email later to m...   Jul 21 2013, 12:09
- - ChronoSphere   There are sometimes different pressings of the sam...   Jul 21 2013, 13:12
|- - LTP   QUOTE (ChronoSphere @ Jul 21 2013, 13:12)...   Jul 21 2013, 13:23
|- - greynol   QUOTE (LTP @ Jul 21 2013, 05:23) it doesn...   Jul 21 2013, 15:52
- - korth   Different drives, different software, different ga...   Jul 21 2013, 14:21
|- - LTP   QUOTE (korth @ Jul 21 2013, 14:21) Differ...   Jul 21 2013, 14:57
- - db1989   OK, my mistake about the availability of the CD. S...   Jul 21 2013, 15:52
|- - LTP   QUOTE (db1989 @ Jul 21 2013, 15:52) OK, m...   Jul 21 2013, 16:51
- - greynol   Even if they were the same disc, a 1-frame differe...   Jul 21 2013, 16:50
- - greynol   I'm betting you overlooked my reply when you p...   Jul 21 2013, 18:31
|- - LTP   QUOTE (greynol @ Jul 21 2013, 18:31) I...   Jul 21 2013, 18:59
|- - db1989   I know this has been answered in a broader sense, ...   Jul 22 2013, 00:37
|- - Goratrix   QUOTE (LTP @ Jul 21 2013, 19:59) but I do...   Jul 23 2013, 08:34
- - Goratrix   Why would anyone even care for pregaps (apart from...   Jul 21 2013, 18:48
- - greynol   You still aren't getting it. Let me reiterate...   Jul 21 2013, 19:25
|- - LTP   QUOTE (greynol @ Jul 21 2013, 19:25) As f...   Jul 21 2013, 19:57
- - greynol   Being told that exact pregap detection is a fantas...   Jul 21 2013, 20:00
|- - LTP   QUOTE (greynol @ Jul 21 2013, 20:00) Bein...   Jul 21 2013, 20:23
- - greynol   Now you know.   Jul 21 2013, 20:26
- - greynol   I fear you're being misled. I will not speak ...   Jul 22 2013, 12:33
|- - LTP   QUOTE (greynol @ Jul 22 2013, 12:33) I wi...   Jul 22 2013, 12:45
|- - db1989   QUOTE (greynol @ Jul 22 2013, 12:33) I fe...   Jul 22 2013, 14:03
- - greynol   Again, I am only talking about EAC. Earlier I sai...   Jul 22 2013, 13:09
- - Wombat   Somehow this thread gives the impressipon that gap...   Jul 22 2013, 23:42
- - greynol   Be careful not to extrapolate two data points to t...   Jul 23 2013, 01:05


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