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Re: "the standard stamping equipment adds errors and jitter"

I don't know if any still do but some early CD mastering processes used subsequent ADC and DAC stages. There is likely to be inherent jitter in those recordings, which is not removeable by any known means. One DAC stage in mastering would be enough for that.

Otherwise, there is no jitter in a disc. There cannot be jitter in digital information stored in a medium. Only when a digital information is modulated into a signal and converted into analog can jitter be permanently imprinted upon the analog signal. What you are saying is that the way some of the discs are made may induce jitter in the transport reading mechanisms. That is possible, but only relevant if you assume the errors are large enough that they are not properly dealt with by the DAC. In today's world that is only a good assumption with underperforming gear.

Good DACs have jitter rejection levels that leave at most a residual level of incoming jitter plus whatever their clock adds. Quite negligible, if you know where to look.

Ciao.



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