Characterizing the effect on linear and harmonic distortions of AC bias and input levels when recording to analog tape

Thomas Mitchell, Christopher Bennett

Research output: Contribution to conferencePaper

Abstract

Analog tape recorders introduce both linear distortions and nonlinear distortions to the audio. While the role of the AC bias and input levels on these distortions are well-understood by recording engineers, the impact on specific audio features, for example SNR, fatness, brightness, roughness and harmonic count is less well described. In this study, we examined with high granularity the impact and interactions of several AC bias and input levels on each of these features. We utilized the exponential swept sine acquisition and deconvolution technique to analyze a Scully 280. The results provide a detailed characterization on the tonal character introduced by the recorder. We conclude with level recommendations that could prove important for primary capture, effects processing, and digital emulation.

Original languageEnglish (US)
StatePublished - Jan 1 2018
Event145th Audio Engineering Society International Convention, AES 2018 - New York, United States
Duration: Oct 18 2018Oct 21 2018

Other

Other145th Audio Engineering Society International Convention, AES 2018
CountryUnited States
CityNew York
Period10/18/1810/21/18

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Modeling and Simulation

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    Mitchell, T., & Bennett, C. (2018). Characterizing the effect on linear and harmonic distortions of AC bias and input levels when recording to analog tape. Paper presented at 145th Audio Engineering Society International Convention, AES 2018, New York, United States.