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In Reply to: RE: Most MFSLs are cut at a lower volume-sadly posted by mspc on June 27, 2012 at 11:12:42
I think even though the JVC "Super Vinyl" formulation is still patented it was found to be too toxic in its manufacturing process for the Japanese Industry Standards....which controlled record pressing in Japan.
I think the best formulations are more about quiet surfaces. Some say a harder vinyl like the Super Vinyl can be a little brighter than softer formulations like German ones. I think the characteristic "sound" of mofi’s were more about mastering and eq decisions than the Super Vinyl formulation. Personally I find the Pallas and Clarity formulations to be some of the best being used today.
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And the Super Vinyl formulation was not about being harder, which it isn't, its about its ability to stress, deform and recover without forming any cracks. If the vinyl in question is too hard its also a problem.I'm trying to remember and I'll find the information if I can but it had to do with the research JVC did into the problem of vinyl fatigue, yes it is a problem with some formulations, and how to create a vinyl that could stress and recover indefinately.
The 30kHz carrier and difference information that is required to make CD-4 work pushed the envelope on vinyl formulations and they needed something where that 30kHz would not get lopped off. Too hard or too soft or anything that would not stress and recover indefinately and you have a problem. The formulation they came up with uses something that is not that unusual but its just the mixture of the plasticizers with the PVC that's the ticket.
Like I said, I'll try to find the information and I'll post it here if I do.
Ed
UPDATE: The formulation is officially known as Q-540 vinyl
We don't shush around here!
Life is analog...digital is just samples thereof
Edits: 06/27/12
well...i'd say it was a harder and stronger formulation than what cbs was using for quads...which was the intent of both rca and jvc and also what drew the initial interest from mofi
Put no extra requirements on the vinyl whatsoever since SQ was an out of phase recording technique. CD-4 was an entirely different animal. It didn't work very well, but when it did work it was capable of much better seperation than any of the quad matrix techniques (SQ, QS, ABC Command Quad and any of the others that I may have left out).
I'm trying to find the patent filing for Q-540 vinyl. That will tell the story of their approach.
Ed
We don't shush around here!
Life is analog...digital is just samples thereof
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