1/2 speed cutting not usually so good?


Any mastering engineer or other person in the know care to comment on Bob Ludwig's letter in the March issue of The Absolute Sound where he indicates that 1/2 speed cutting is a trade-off. He says that a cutter head flat to 20Hz is only flat to 40Hz at half speed. In combination with the RIAA cutting curve, Ludwig says that an additional equalization circuit is needed for 1/2 speed cutting that introduces extra ringing and distortion. He concludes: "For some music, half-speed cutting is an advantage, for the majority, probably not."
Perhaps I misunderstand the process. But if I have it right, some other folks including those at Mobile Fidelity may want to provide a different viewpoint.
gpgr4blu
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MoFi lp inserts still refer to a half speed mastering process and how the cutter head has twice as much time to direct cut complex grooves. Unless their inserts are wrong, they are still cutting at half speed.
"The quality of a record starts with the quality of the master tape, the lathe, the skill and care of the people involved, the demand for perfection... Sometimes the reissues are great, sometimes the old-fashioned older pressings are better."

Cutting records was an artform in the golden age of vinyl. I agree with you but would add that the quality and purity of the vinyl is an important part of the process.

And half-speed or not, I have had a few MOFI records with pops and clicks in them. So Chayro makes a very valid point.