Exact Audio Copy Error Correction
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Sound Editor Tips & Tricks Information Awards Contact About me Resources Download What's new Registration Links Commercial SDK Support FAQ Forum Documentation Other Projects DAE Quality Extraction Technology In secure mode this program either reads every audio sector at least twice or rely on extended error eac peak level information that some drives are able to return with the audio data. That is exact audio copy flac one reason why the program is slower than other rippers. But by using this technique non-identical sectors are detected. If an error exact audio copy guide occurs (read or sync error), the program keeps on reading this sector, until eight of 16 retries are identical, but at maximum one, three or five times (according to the selected error recovery quality) these 16
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retries are read. So, in the worst case, bad sectors are read up to 82 times! But this effort will help the program to obtain the best result by comparing all of the retries. Advertisement / Anzeige If it is not sure that the audio stream is correct (at least that it can not be said at approx. 99.5%) the program will tell the user where the (possible) read error occurred. The program exact audio copy portable also tries to correct 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 technology is a little bit more complex, especially with some CD drives which implements caching. When drives cache audio data, every sector read will be read from the drives cache and is that way always identical. Basically there are several ways to clear the cache. In newer versions it will overread sectors, so that the cache contains sectors from a position elsewhere on the CD. Advertisement / Anzeige EAC has several secure read modes, depending on the features of the drive. One really fast mode (nearly burst mode speed) is for drives with C2 error pointer support, accurate stream and are non-caching. Another mode (up to half of maximum speed) is for non-caching, accurate stream drives (without C2 support). If caching need to be defeated, the secure mode will be much slower, when no read errors occur it will usually something around a third to a fourth of the drives maximum speed. This program is really quite slow in secure mode in comparison with other grabbers, but the program checks every sector over and over to get
error correction question 1 Print Topic: EAC error correction question(Read 4158 times) previous topic - next topic 0 Members and 1 Guest exact audio copy mac are viewing this topic. Emiliano55 Jr. Member Joined: 19 August, 2005 Posts:
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56 Logged EAC error correction question 26 May, 2012, 06:21:13 PM Hey guys,I have been using EAC for many
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years. I'm currently using V0.95b3, in fact I guess that's the version I always used. Never gave me any problem However, there's a concern I've always had and never managed http://www.exactaudiocopy.de/en/index.php/overview/basic-technology/extraction-technology/ to figure it out. I think now is the time.Is it normal to ALWAYS get the error correction bar to work at some tracks on a CD ? I mean, even if the CD is in PERFECT conditions (brand new), I always get the red error correction bar working a bit on some tracks (always at the end of them). Like I https://hydrogenaud.io/index.php/topic,95171.0.html said, I have burned TONS of CDs (mostly of them at perfect conditions) but I always get the error correction bar working at the end of like 2-5 tracks on each CD. Hence, I always get 99.9 quality on those 2-5 tracks per CD. The rest is 100% quality at the final report. I have never got a FULL result of 100% track quality on ANY of all the cds I burned, the error correction always appears on some tracks even if the CD is perfect.My question is, is this normal ? Is it something techinal regarding about EAC/drives that needs to do it at the end of some tracks ?Any comment would be really appreciated Thanks!! Last Edit: 26 May, 2012, 06:26:13 PM by Emiliano55 greynol Hero Member Joined: 01 April, 2004 Posts: 12,173 Logged Global Moderator EAC error correction question Reply #1 – 26 May, 2012, 11:43:24 PM It's perfectly normal; an annoying side effect from the way EAC specifically requests and utilizes discrete chunks of data in order to satisfy its internal requirements to ensure secure ripping.If your concern
Ripping using EAC What EAC Does Generally, EAC will extract the CD tracks to WAV files, then call an external encoder to encode the files. The external encoder is often a command-line encoder - you http://wiki.slimdevices.com/index.php/EAC_Ripping can have it pop up if you wish to track its progress. When http://www.afterdawn.com/news/article.cfm/2009/02/12/review_exact_audio_copy_0_99_perfect_cd_copies_or_just_hype the encoder is finished, the WAV is deleted - you can disable this but there's no need to if you're encoding to a lossless format. The ripping and encoding processes are entirely separate. Therefore EAC can still be ripping while the encoder is working, or EAC can have finished ripping the disc exact audio while the encoder is still running. In fact, if you have set EAC to automatically eject the disc after ripping, you can load another disc while the encoder is still running. Note that you can set EAC to rip everything, then start the encoder, or start multiple encoder instances. Since EAC doesn't significantly load the processor, you can safely run at least one compressor instance while exact audio copy EAC is ripping. Running more than one compressor instance heavily loads the processor and is not recommended, but you can do this, see EAC - EAC Options - Tools - "On extraction, start external compressors queued in the background", followed by the number of external conmpressor instances allowed. While the encoder is still running, the filenames and files in the directory where the encoded files are being written will not be accurate. There may be temporary WAV and compressed files with bizarre names. Do not delete them or attempt to load them. They are incomplete and loading them may interrupt the compression process. Now that you have completed the arduous task of installing and configuring EAC, its time to sit back and enjoy the ease-of-use of a properly setup EAC: Find a CD that you want to rip. Make sure the bottom surface of the CD is clean. Look for fingerprints, dust, dirt and scratches. If you find any, clean the bottom surface of the disc with a microfibre cloth and glass cleaner or 50% isopropyl alcohol / 50% water mix. Always wipe in a straight line from the centre of the disc to
Audio Copy 0.99 - Perfect CD copies or just hype? Review: Exact Audio Copy 0.99 - Perfect CD copies or just hype? Written by Rich Fiscus (Google+) @ 11 Feb 2009 19:11 User comments (19) Over the last few years Exact Audio Copy (EAC) has gotten a reputation as one of the best (if not the very best) audio CD ripping tool around. Despite being officially designated as "prebeta" software it's actually one of the most reliable and full-featured audio tools available. We've recently added three guides that take you from installation to ripping CDs, and even explain how to work with the unusual CD Image backups it produces. But before you read these guides you may want to find out more about the program to see if it's right for you. Secure Ripping Although most people tend to think of CDs as sounding the same every time they're played, in reality almost every time a disc is read there are errors. With modern media like DVD, or even CD-ROMs, this can be dealt with using very sophisticated error correction to re-create the original data. Audio CDs, on the other hand, primarily use a strategy of hiding errors instead of correcting them. While this increases the amount of damage it takes to audibly reduce quality, it also increases the complexity of performing perfect backups. Afterdawn's new EAC guidesExact Audio Copy Installation and ConfigurationRip CDs With Exact Audio CopySplit CD Images To Individual TracksEAC uses something called Secure Ripping to address the problem. Most CD rippers simply read each block of data once and assume the results are correct. EAC reads each one multiple times and compares the results to make sure they're the same. If they aren't the same it reads them again. For damaged CDs this can result in rips that require hours to complete, but for discs in good, but not great condition it can be the difference between a copy that's perfect and one that's just pretty close. CD Images If you look at an audio CD on your computer it appears to contain several individual audio files. This is what allows your computer to play or rip a particular track. But that's not actually how the data is stored on the