Ted Bildplatten Aktiengesellschaft, Aeg-telefunken, Teldec

Hans-Joachim Thuy

Gerhard Dickopp

A method of producing a record carrier with stored signals thereon and the record made thereby. The method comprises applying to a flexible record carrier hill and dale undulations which correspond to a broadband signal in the form of a frequency modulated carrier frequency oscillation, further applying at least one further signal of lower frequency superimposed on the broadband signal, and selecting an amplitude for the further signal such that in playback of the stored signals by a skid-shaped pickup operating by compression of the hills, even the lowest hills contact the skid-shaped pickup and are compressed thereby.

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Berlin, Germany

Hans-Joachim Thuy