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> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of Mike Richter
> Sent: Thursday, December 07, 2006 12:32 PM
> To: [log in to unmask]
> Subject: Re: [ARSCLIST] The ways CD's and DVD's can fail.
> 
> Christie Peterson wrote:
> > Mike Richter wrote:
> >>
> >>
> >> Poorly recorded discs are vastly more sensitive to failure over time
> >> than those recorded with low error rate. In an attempt
> >
> > Hi, Mike.
> >
> > What do you consider to be low (or acceptable) C1 and C2 error rates?
> > I've been running CDSpeed on my discs, which appears to give a quality
> > score of "0" if there are any C2 errors at all.
> >
> > Others, please feel free to chime in as well.
> 
> I demand zero errors for C2. C1 is more a 'feel' at this point; I've not
> determined what rates for peak and average mean what when they are as
> low as they seem always to be when C2 is zero.
> 
> I note that my current supply of Mitsui silver has about 30% lower C1
> errors than my current T-Y discs, so believe them to be 'better', but I
> cannot say by how much or even whether that's significant. When I send
> out masters for duplication or replication, I send one of each.
> Eventually, one of the duplicators or replicators will find one that's
> faulty - and will have the different master to use. So far, none has.
> 
> Mike
> --
> [log in to unmask]
> http://www.mrichter.com/

Mike is generous with his support, but I should add that there is no
standard definition of C1 and C2 errors. Their meaning depends on whatever
the drive designer selects.

Jerry
Media Sciences, Inc.