Thanks, Vincent. I wonder what causes the horizontal striations on the pictures magnified 500 times and 1000 times. And also wonder if these striations can be picked up by the stylus, and if they have the same effect as dither added in digital.......
Also want to say thanks as well.
What would had been nice is if they examined a recognised pristine LP (meaning it is known to come from the 1st made stamper is one of the very 1st pressed vinyl LPs, combined with being one of the better compound LPs), compared to a mass produced general US pressed LP where the stamper has begun deteriating (starts after 1000 pressings) and are not left to cool for long enough or not pressed at right temperature-duration or cheaper vinyl compound.
People would be surprised with the difference, and even with the vinyl as briefly emphasised in my quote relating to issues around CD-4 LP, and can be read from various articles on those who were engineers involved in the whole lacquer-plating-pressing process along with vinyl compounds.
Another point, shame the CD view is not magnified even more, it is like looking at the LP at say 100x to 200x for structure detail, still this points that the pits on the CD are truly miniscule in comparison, though this is more likely a challenge for the CD mechanism-reading and servo code.
If in doubt that it can vary, one of the magazines examined both a standard and gold comparable CD (Japanese import) that were of the same recording but with the gold mastered with 1db-ish more loudness; the result was that the gold CD had 50% less read related issues and this surprised them.
Of course this does not mean it results in audio difference and the magazine emphasised that point, but it does show it is not error proof.
Again to stress both measurements were technically within redbook tolerances, so please take this more from an engineering consideration in the context of the above discussion - that being variations are possible but not seen with the level of detail provided with the CD image, and that while the fluctuation may be large for a vinyl LP its architecture/structure is nowhere as miniscule as that of CD.
Cheers
Orb
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