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Re: [ARSCLIST] Memorex CDs
On 16/01/06, steven c wrote:
> Well, this would be fairly simple with an analog disc record, since
> the path of the groove actually mirrors the waveform of the sound
> that was recorded. It will be somewhat more complicated for stereo
> recordings, since they reflect two different waveforms simultaneously
> (this assumes that a way could be found to "read" a vertically
> modulated groove or the vertical component of one?). However,
> "reading" a CD providing one had enough magnification to
> visually identify the pits (or absences thereof) would require
> knowing or deducing the algorithm used to translate this into
> a sound signal!
The format is fully published.
It would in any case be a simpler version of whatever digital coding is
common in 100 years time, so any expert on digital coding will know what
to look for.
If there is a Dark Age resulting from nuclear war, plagues killing 95%
of the population, alien invasions, etc then the knowledge may well be
lost. But assuming things go on much as they have for the past 200
years, CDs will be readable.