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On 2/12/2013 5:22 PM, Paul Stamler wrote: > Can anyone recommend a book I can cite about the phenomenon of "cutover", where > an overmodulated phonograph groove cuts through the wall into the adjacent > groove, causing skipping in playback? I remember, from many years ago, a > discussion of this someplace, including a photo of a cutover groove, but I > can't find it now. I thought it was in the Radiotron Designer's Handbook, but > it doesn't seem to be. > > If someone could recommend such a reference -- ideally including the term > "cutover" -- I'd be most grateful. The term we used at RCA Victor was "overcut" I believe the Audio Cyclopedia by Howard Tremaine has that detail. ... Graham Newton -- Audio Restoration by Graham Newton, http://www.audio-restoration.com World class professional services applied to tape or phonograph records for consumers and re-releases, featuring CEDAR's CAMBRIDGE processes.