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Topic: Question about Pre-gap lenght (Read 2385 times) previous topic - next topic
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Question about Pre-gap lenght

Hi guys! I use EAC to rip my original album cds. I copied a cd from my friend, SonicYouth - EVOL, and I noticed that first track of album starts to 1.45s instead of 0 seconds. I tried to download this album from web, ripped with EAC, and first track starts from 0 seconds. It could depend from a different pressing cd or reissue version? Here's the log of first track:

Spoiler (click to show/hide)
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #1 –
CD times are displayed in EAC as hours:minutes:seconds.frames (1 frame = 1/75 seconds) by default. There is a setting that will allow you to display time in fractions of a second but the CUE sheet and TOC will still be displayed in the native CD frame format.

Based on the wording of your question and lack of the TOC section, I don't know if your log is in frames or seconds. 0:00:02.42 in seconds would be 0:00:02.32 in CD frames

Quote
It could depend from a different pressing cd or reissue version?
Yes most likely CDs were made at different manufacturing plants.
http://db.cuetools.net/stats.php  The stats chart at lower right (CUETools DataBase) shows that 32, 33, and 37 FRAMES as the most frequent.
https://musicbrainz.org/release/daea7166-4653-32d6-b25e-ad827325da15/discids
If you click on each of the 6 Disc IDs you'll see there are releases that start at 150, 182, 183, and 187 FRAMES so that's 2:00, 2.32, 2.33, and 2.37 in seconds.FRAMES
There could a release that starts at 2.42 that isn't in the database.
korth

Re: Question about Pre-gap lenght

Reply #2 –
On Discogs, I see that there is 18 different pressings on CD for Sonic Youth - EVOL.
If you look carefully at the CD-Matrix, you might spot the difference between pressings

Re: Question about Pre-gap lenght

Reply #3 –
Quote from: korth on
CD times are displayed in EAC as hours:minutes:seconds.frames (1 frame = 1/75 seconds) by default. There is a setting that will allow you to display time in fractions of a second but the CUE sheet and TOC will still be displayed in the native CD frame format.

Based on the wording of your question and lack of the TOC section, I don't know if your log is in frames or seconds. 0:00:02.42 in seconds would be 0:00:02.32 in CD frames

https://musicbrainz.org/release/daea7166-4653-32d6-b25e-ad827325da15/discids
If you click on each of the 6 Disc IDs you'll see there are releases that start at 150, 182, 183, and 187 FRAMES so that's 2:00, 2.32, 2.33, and 2.37 in seconds.FRAMES
There could a release that starts at 2.42 that isn't in the database.

This is the toc of first track:

     Track |   Start  |  Length  | Start sector | End sector
    ---------------------------------------------------------
        1  |  0:00.32 |  3:06.08 |        32    |    13989

I checked on musicbrainz but there's no the id of cd copied. I suppose this is from accurip:

[CTDB TOCID: rqtf3yWR2BwI_eELte7SEpHs_Sc-] found.

I checked with another my copies on musicbrainz but there's no disc id like mine.

@TuNk77 Now I no longer have that cd to check cd-matrix because as I wrote in the post it's from a friend of mine.
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #4 –
Quote
I checked on musicbrainz but there's no the id of cd copied.
You need to look at the links.
29hklo2TBkgLvYfJaDs6H8w6lfA-
and
jz74caJl0DFg4.ngIlwIl1UQyiI-
start on frame/sector 182
If you had provided the full TOC, I could've told you if one of them were yours.

edit: fix links
korth

Re: Question about Pre-gap lenght

Reply #5 –
Ah ok:

Code: [Select]
     Track |   Start  |  Length  | Start sector | End sector 
    ---------------------------------------------------------
        1  |  0:00.32 |  3:06.08 |        32    |    13989   
        2  |  3:06.40 |  3:32.67 |     13990    |    29956   
        3  |  6:39.32 |  4:48.23 |     29957    |    51579   
        4  | 11:27.55 |  3:25.10 |     51580    |    66964   
        5  | 14:52.65 |  3:46.15 |     66965    |    83929   
        6  | 18:39.05 |  3:19.60 |     83930    |    98914   
        7  | 21:58.65 |  2:54.20 |     98915    |   111984   
        8  | 24:53.10 |  4:04.15 |    111985    |   130299   
        9  | 28:57.25 |  7:19.57 |    130300    |   163281   
       10  | 36:17.07 |  2:50.25 |    163282    |   176056 
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #7 –
So this is my cd version? In cue file I have this: REM DISCID 89092B0A
In your link I see this: FreeDB:    89092b0a
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #8 –
yes, same ID.
korth

Re: Question about Pre-gap lenght

Reply #9 –
But in Start Sector I see different values. Mine is 32 and musicbrainz is 182 frames.
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #10 –
MusicBrainz includes the 2 second (150 frames [or sectors]) lead-in area. You need to subtract 150 from the Start Sector and 151[1] from End Sector to match the EAC log TOC.

DISCID 89092B0A uses the same start frames [or sectors] as MusicBrainz.

1 MusicBrainz shows the End Sector and the next Start Sector as same value (e.g. 1000, 1000) where the EAC log TOC shows the End sector as the (end of) previous sector (e.g. 999, 1000)↵
korth

Re: Question about Pre-gap lenght

Reply #11 –
I didn't understand anything but I trust you! ahahahah I checked some of my sonic youth album and it seems they are starting with 32 frames and musicbrainz with 182. I tried to calculate the frames for some other album but I see that one frame is missing.
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #12 –
@korth are you there? :)
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #13 –
I didn't see a new question or additional information I could evaluate (e.g. links, complete logs, etc.).
korth

Re: Question about Pre-gap lenght

Reply #14 –
Sorry @korth my fault! I miscalculated the frames  :-[ Can I ask two fast question to conclude?
"Always account for the change."

Re: Question about Pre-gap lenght

Reply #15 –
Sure, if related to this thread, here, otherwise new topic please.
korth