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Topic: Ripping a CD - Clean vs Explicit, will it be "Accurately Ripped"? (Read 1368 times) previous topic - next topic
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Ripping a CD - Clean vs Explicit, will it be "Accurately Ripped"?

I've ripped a CD of a specific album, and got everything accurately ripped and very confident of this.

However, upon loading the censored version of the disc, EAC assumed that this was the explicit disc because the track lengths etc are all the same. Before I rip this CD, isn't this going to give me problems saying that it is not accurately ripped? It never gave me the option to choose the metadata for a different version of the album.

Will it just say that the censored tracks are "Not verified" but "match XX other rips"? Therefore allowing me to be confident that it is in fact accurately ripped?

 

Re: Ripping a CD - Clean vs Explicit, will it be "Accurately Ripped"?

Reply #1
If both versions have the same TOC and both are in the database then separate CRCs are stored.
korth

Re: Ripping a CD - Clean vs Explicit, will it be "Accurately Ripped"?

Reply #2
If both versions have the same TOC and both are in the database then separate CRCs are stored.

"both are in the database" - referring to what exactly? What differentiates the two in the database if the TOC are the same? And I assume the CRC would be different, so is that the only way that the database knows they should be separate entries? I am ripping it as we speak, just don't want to contribute to wrong data in the database.

Re: Ripping a CD - Clean vs Explicit, will it be "Accurately Ripped"?

Reply #3
If there are two CRCs then your rip will match one or the other or neither.

If AccurateRip V1 CRCs and AccurateRip V2 CRCs both exist then both are stored under the same TOC.

Alternate pressing CRCs (if they exist) are stored under the same TOC.
korth

Re: Ripping a CD - Clean vs Explicit, will it be "Accurately Ripped"?

Reply #4
The track lengths determine the accuraterip ID. Thus for example, among CD singles with one track of like three and a half minutes, there will be a lot of "collisions" where many releases have the exact table of contents to the 1/75th of a second (which is the granularity of the CD format). So yes, the only difference the database sees, is then if the checksums differ. It does not listen to the music, so it does not go by way of say MusicBrainz' audio identification. (The metadata are retrieved from different databases!)

Then as korth pointed out, different pressings and the old v1 and new v2 checksum are just entries under the same TOC. But it suffices that it matches someone else's rip. You simply don't care that it fails to match checksums computed from a CD with same TOC and different music.

The difference between V1 and V2 is that it was found that the V1 algorithm was crude and left out too much (in the dev's opinion) of the audio. Others did question whether the move to V2 was then necessary, for reasons I only have a vague memory of (I think what was lost was in one channel, and the chances that you got an error in one channel only wouldn't be much, and the chances of an undetected one even less). But whatever happened, V2 was introduced. New ripping applications can compute the V1 and V2 checksum from your rip, and look up for a match. Of course that increases the chances of a false positive to two snowballs in hell.