This paper describes a new optical device for the scanning and measurement of groove modulation amplitudes and instantaneous cutting velocities of 45/45 stereo records.

Authors: Redlich, Horst; Klemp, Hans-Joachim
Affiliation: Teldec, Berlin, Germany
AES Convention: 10 (September 1958) Paper Number: 59
Publication Date: September 1, 1958

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