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Journal Article

Time Base Distortion in Continuous Recording Systems: Its Terminology, Measurement, Causes and Effects

Authors: McKnight, John G.

Journal of the Audio Engineering Society · Volume 10 · Issue 1 · pp. 44–48 · January 1962

Abstract

Speed variations of the medium in a recording/reproducing system cause time base distortion (TBD) which is seen as frequency modulation, commonly called -flutter,- or as changes of time intervals, called -time displacement error.- Presently used terminology is ambiguous; clarifications and new terminology are proposed. The ultimate use for the system determines which effects of the TBD are of importance: The effects and their measurement in sound recorders and in instrumentation recorders are discussed. Measurements to compare TBD by standard methods are described, and found not to be closely related to either the causes or the effects of the TBD. The speed variations may be determined and analyzed in designing a transport by measuring and analyzing the frequency modulation produced thereby.

Details

Publication
Journal of the Audio Engineering Society
Volume
10
Issue
1
Pages
44–48
Publication date
January 6, 1962
Affiliation
Ampex Corporation, Audio Division, Sunnyvale, CA (See document for exact affiliation information.)
Type
Journal Article