Tracing and tracking errors in phonograph reproduction are shown to have a common basis of analysis, the skew transformation, and the distortion arising from these errors are to be due solely to phase perturbation. The phase-perturbation model is used to show the principles by which compensating schemes must be governed, and one such scheme is discussed. Formulae are given for the distortion arising from the joint application of tracing and tracking error, and the recording-velocity restrictions so implied are plotted. In an appendix, a means for obtaining exact closed-form Fourier analyses is explained and results quoted.
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.