November 2007
Intermediate to advanced
736 pages
46h 32m
English
The sine-wave groove of Fig. 9.11 also illustrates the pinch effect which results from the varying width of a modulated groove on a monaural recording. Because of this varying width, the pick-up stylus will have to ride up and down as it traverses the groove, Fig. 9.12.
Fig. 9.11 Illustration of tracing distortion (sine-wave modulation of recording groove is greatly magnified)
At the end of a microgroove recording, the maximum vertical movement may be as much as 11 % of the maximum lateral displacement. The output of some pick-up heads varies slightly with this vertical movement so that pinch effect can be an additional source ...
Read now
Unlock full access