cliveb;150966 Wrote: 
> Quite true.
> 
> 
> You're misinterpreting what's going on here. Yes, ripping software can
> re-read in an attempt to get clean data after an uncorrectable error.
> However, the 0.1x rates you have seen refer to the average read speed
> over the track (or disc) compared to realtime. When the software
> re-reads the faulty sector, it is still constrained by the capabilities
> of the hardware CD drive, and in fact many modern CD and DVD ROM drives
> have a minimum read speed higher than 1x. A minimum speed of 4x is not
> unusual. So in fact what's going on is the ripping software is reading
> the failed block over & over again, but still at fairly high speed.
> 
> 
> In most cases, there are no uncorrectable errors on the disc, and you
> get the same data whether you rip or record the SPDIF. And in that
> case, ripping is obviously more convenient.
> 
> In those cases where there are uncorrectable errors, the re-reading
> strategy often fails to improve matters. If a disc is damaged, reading
> it again doesn't make the damage go away. So then you're at the mercy
> of whatever concealment technique is provided by the hardware and/or
> software. And in these cases some CD players *might* do a better job
> than the ripping method.

On the other hand, if the rip fails, you can polish the CD and try
again. Personally I would rather buy new versions of the few that can't
be properly ripped than even considering capturing from a CD player.


-- 
P Floding
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