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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: A mono cutter head.... posted by vinyl1 on September 20, 2014 at 04:08:00:
vinyl1, I am not familiar with U-shaped grooves in LPs. Here is information from "Audio Cyclopedia" by Howard Tremaine:
13.30 . . . In the normal recording of records the groove walls form an angle of 90 degrees, which is particularly important in recording stereophonic records using the 45/45-degree system. For records cut before the advent of stereo, lateral records were cut using an 87-degree included angle stylus, on the assumption that after processing the groove grew to 90 degrees.
So yes, mono LPs were cut with lateral motion (not back and forth). Stereo LPs are made possible by the 45/45 system which introduced vertical motion at the same time. But that does not sound like a U-shaped groove.
Now the question is: are modern mono reissues cut with a one channel signal and lateral motion only, or are two identical channel signals cut with both lateral and vertical motion?
Note that either could be done with stereo cutter heads since apparently mono heads are no longer available.
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Follow Ups
- RE: A mono cutter head.... - M3 lover 11:03:26 09/21/14 (0)
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