Difference between revisions of "Exact Audio Copy"
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In "'''Secure Mode'''", the program reads every audio sector at least twice, hence detecting non-identical sectors. If an error occurs (read or sync error), the program continues to read the same sector, until eight of 16 retries are identical, but at maximum one, three or five times (according to the error recovery quality). So, in the worst case, bad sectors are read up to 82 times! But this will help the program to obtain the best result by comparing all of the retries. If it is not sure whether the stream is correct (at least it can be said at approx. 99.5%) the program will show the user the location of the (possible) read error. | In "'''Secure Mode'''", the program reads every audio sector at least twice, hence detecting non-identical sectors. If an error occurs (read or sync error), the program continues to read the same sector, until eight of 16 retries are identical, but at maximum one, three or five times (according to the error recovery quality). So, in the worst case, bad sectors are read up to 82 times! But this will help the program to obtain the best result by comparing all of the retries. If it is not sure whether the stream is correct (at least it can be said at approx. 99.5%) the program will show the user the location of the (possible) read error. | ||
| − | The program also tries to adjust the jitter artefacts that occur on the first block of a track, so that each extraction should be exactly the same. On drives which have the "accurate stream" feature, this is guaranteed. Of course, this is a little more complicated, especially with some CD drives which cache audio data. In such drives, every sector read will be from the drive's cache and is therefore identical to the data that was previously read | + | The program also tries to adjust the jitter artefacts that occur on the first block of a track, so that each extraction should be exactly the same. On drives which have the "accurate stream" feature, this is guaranteed. Of course, this is a little more complicated, especially with some CD drives which cache audio data. In such drives, every sector read will be from the drive's cache and is therefore identical to the data that was previously read, thereby rendering EAC's errror detection abilities ineffective. However, In the current beta version (when the program is properly configured), the cache will be reset by resetting the drive completely. This is the reason why the reading is so slow in "Secure Mode". |
Revision as of 01:30, 1 November 2004
Exact Audio Copy(EAC for short) is a free software that can be used to extract tracks from an Audio CD to your computer's hard disk. What makes EAC special compared to other rippers is the fact that it is capable of reading audio CDs almost perfectly. EAC uses various methods for extracting audio data. EAC can also invoke externally installed encoders, thereby making it possible to simultaneously rip and encode audio data to the format of your choice.
In "Secure Mode", the program reads every audio sector at least twice, hence detecting non-identical sectors. If an error occurs (read or sync error), the program continues to read the same sector, until eight of 16 retries are identical, but at maximum one, three or five times (according to the error recovery quality). So, in the worst case, bad sectors are read up to 82 times! But this will help the program to obtain the best result by comparing all of the retries. If it is not sure whether the stream is correct (at least it can be said at approx. 99.5%) the program will show the user the location of the (possible) read error. The program also tries to adjust the jitter artefacts that occur on the first block of a track, so that each extraction should be exactly the same. On drives which have the "accurate stream" feature, this is guaranteed. Of course, this is a little more complicated, especially with some CD drives which cache audio data. In such drives, every sector read will be from the drive's cache and is therefore identical to the data that was previously read, thereby rendering EAC's errror detection abilities ineffective. However, In the current beta version (when the program is properly configured), the cache will be reset by resetting the drive completely. This is the reason why the reading is so slow in "Secure Mode".
