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In Reply to: Perfect copies posted by jmrdc on February 24, 2007 at 12:29:48:
Hey gang:I re-installed EAC lately, and when I set it up (this time) I was getting higher extraction speeds (about 10x). After fiddling around I got the burn speed down to 2.5x again (I think it was the "allow slower extraction speed" option.) In any case, when I did rips at 10x and then ran glitch removal, I was getting #glitches in the hundreds to thousands, depending on the track.
At 2.5x, I was getting ZERO glitches (consistently) on the CD I was extracting last night.
Anyone have any idea what a glitch *is* and why there are so many at 10X extraction speed and ZERO at 2.5X?
Follow Ups:
when i slowed my ripping down i got better *perfect* results....
A glitch is basically a bit error. There can be quite a few reasons ripping slower causes fewer or less of them, such as less vibration in the CD mechanism, so less read errors, slower speed=less buffer overrun, etc.Not sure if your software uses error correction while ripping, or if it even gives you that option, but the one I use has the option to use it or not, and it runs noticeably slower when error correction is on.
Brassteacher:EAC does implement error correction, and can be set up to "permit lower extraction speed" I find that with these enabled you get extraction speeds of around 2.5 times, and "zero glitch" rips.
If "permit lower extraction speed" is disabled, the speed jumps up to about 10 times, but glitches can be had in the hundreds if not thousands. Very bad.
This setting is a must for EAC IMO.
I can't seem to find "permit lower extraction speed" in my EAC "Options". Where do I find it?
Gerry
....thanks, Presto. So much for instant plug-and-play, as we would love to expect. Whether it's iTunes or EAC, there are specific operations details all of us need to know before proceeding with hard disc playback.
It's my understanding that the Glitch Removal is simply a wav editing processing that removes pops and clicks. In other words, it should only be used on a track that is very scratched and damaged and you could not extract a better rip (and has audible pops and clicks). The Glitch Removal is not error correction and will not give you a more accurate rip. In fact it is known that EAC's implementation will find a lot of false positives. (Sounds within a song that it thinks are pops and clicks)As for the difference in the ripping speed. The best way to determine your optimal rip speed is to rip a track at multiple speeds. Then use the "Compare WAVs" tool. If the one ripped at 10X is identical to the one ripped at 2.5X then there is no need to use the slower speed. (Unless of course you have a scratched/damaged disc)
I recent used the compare wavs tool on the same files except on was ripped faster (I to just re-did eac). Anyhow, it took a while, and then it just reported a blank screen.THe screen had something like "errors found" on the top line, but nothing below them. It was just blank.
I guessed tha there were no errors, but it wasn't specifically clear if this was the case, or if this was an glitch.
Yes, when the screen comes up blank, that means they are an exact match. No errors. If there were any discrepancies, they would be listed by error (such as "different samples") and then the position (time).
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