11 Aug
2013
11 Aug
'13
8:45 a.m.
On 09/08/13 23:54, Eric Smith wrote:
The optimal precomp actually depends on the model of
drive, the track
number, and to a lesser extent on the medium. For commodity hardware
they obviously had to come up with a compromise that would work pretty
well on all drives and media.
It should be possible to write software to use a DiscFerret or the
like to automatically determine the optimal precomp for every track
for a particular drive model.
I'd actually like to do this - the question is how you'd implement it.
There were disk drive / media testers like the Brikon 723 which could
measure peak shift (or at least the Samsung SFD321 datasheet provides a
peakshift figure allegedly measured with one), but the manuals for the
Brikon don't go into much detail about how they measure peak-shift.
At the moment, it falls under the category of "could probably be done,
but I don't know how".
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/