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Understanding Rippers and Accuraterip Submissions
post Sep 10 2012, 15:48
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I'm trying to learn more about the process of ripping and how it works in regards to Accuraterip.

"For example, audio CDs contain 16-bit, 44.1 KHz LPCM-encoded audio samples interleaved with secondary data streams and synchronization and error correction info. The ripping software tells the CD drive's firmware to read this data and parse out just the LPCM samples. The software then dumps them into a WAV or AIFF file, or feeds them to another codec to produce, for example, a FLAC or MP3 file."


If I insert a CD from say Led Zepplin's box set of complete studio recordings, or an Elton John hybrid SACD, or a CD that's been remastered, how does a ripper and Accuraterip differentiate and correctly identify which of the recordings I have? If the selection the ripper returns in identifying the media is wrong (the media is a 2009 remaster and the ripper claims it is the original 1973 disc) and I don't change/correct it, how does that affect the database?
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post Sep 10 2012, 19:05
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I don't care who added it. From the standpoint of someone viewing the database irrespective of the limitations of any single piece of software, ARv2 was just a silly and futile patch to a half-baked checksum algorithm in order to attempt to fix a problem that was never shown to exist in the real-world. To suggest that it is required for cross-pressing verification is categorically incorrect. Long prior to the advent of ARv2, the AR database has been successfully used for cross-pressing verification. I don't think it's a good idea to rewrite history for the sake of convenience.

A good wiki article will answer the basic questions asked rather than dive into a convoluted explanation of offsets and overreading.

What does AR do?
How is AR organized?
What do AR results mean?
What are pressings according to AR and how does this differ from what pressings are in real-life?
What steps are taken to curb errant or redundant submissions as well as vandalism?

Another question on a different point:
How does a drive know where the disc ends?

This post has been edited by greynol: Sep 11 2012, 16:46

Your eyes cannot hear.
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Posts in this topic
- jayess   Understanding Rippers and Accuraterip Submissions   Sep 10 2012, 15:48
- - greynol   AR records are based on the lengths of tracks (inc...   Sep 10 2012, 15:54
- - pdq   There are multiple online databases of CD metadata...   Sep 10 2012, 16:04
- - greynol   That wikipedia article has nothing to do with AR e...   Sep 10 2012, 16:10
- - Tahnru   HA has a very nice wiki. http://wiki.hydrogenaud...   Sep 10 2012, 16:27
- - greynol   Not the best article I've seen but not the wor...   Sep 10 2012, 16:52
- - mjb2006   It would be quite impressive to find a CD from 197...   Sep 10 2012, 18:52
- - greynol   I don't care who added it. From the standpoint...   Sep 10 2012, 19:05
- - jayess   To put this into perspective, when I insert this d...   Sep 10 2012, 19:16
- - db1989   Wow… Just wow. The album was first released in ...   Sep 10 2012, 19:40
|- - jayess   QUOTE (db1989 @ Sep 10 2012, 13:40) Wow… ...   Sep 10 2012, 19:46
- - pdq   Many different people submit CD metadata to the da...   Sep 10 2012, 19:58
|- - jayess   QUOTE (pdq @ Sep 10 2012, 13:58) Many dif...   Sep 10 2012, 20:04
||- - greynol   QUOTE (jayess @ Sep 10 2012, 12:04) I fix...   Sep 10 2012, 20:32
||- - greynol   QUOTE (greynol)What are pressings according to AR ...   Sep 10 2012, 20:48
|- - jayess   QUOTE (pdq @ Sep 10 2012, 13:58) Many dif...   Sep 10 2012, 20:19
- - greynol   The last question was there to address an explanat...   Sep 10 2012, 20:23
- - godrick   mjb2006, I heartily agree a single reference wiki ...   Sep 10 2012, 22:29
- - jayess   This stuff does make you go h'mmm. I find out ...   Sep 11 2012, 13:49
- - pdq   When you first put the CD in, it reads the TOC and...   Sep 11 2012, 14:22

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