I took a course in vinyl disk mastering at the Institute of Audio Research in 1974. Many hours of learning the limitations of the medium and how to cut a master lacquer that could be turned into a record that would be as good as possible. They had a lathe and we got to cut a master lacquer but never had them turned into pressings.
If anyone thinks they can get more out of the vinyl medium and still use a standard phono cartridge, stylus and preamp with the RIAA playback curve, I'd love to see it.
I don't think it is physically possible, but I'm willing to read what they have to say.
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