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Feedback Amplitude Modulation Synthesis

Abstract

A recently rediscovered sound synthesis method, which is based on feedback amplitude modulation (FBAM), is investigated. The FBAM system is interpreted as a periodically linear time-varying digital filter, and its stability, aliasing, and scaling properties are considered. Several novel variations of the basic system are derived and analyzed. Separation of the input and the modulation signals in FBAM structures is proposed which helps to create modular sound synthesis and digital audio effects applications. The FBAM is shown to be a powerful and versatile sound synthesis principle, which has similarities to the established distortion synthesis methods, but which is also essentially different from them.

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Correspondence to Jari Kleimola.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kleimola, J., Lazzarini, V., Välimäki, V. et al. Feedback Amplitude Modulation Synthesis. EURASIP J. Adv. Signal Process. 2011, 434378 (2011). https://doi.org/10.1155/2011/434378

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Keywords

  • Information Technology
  • Quantum Information
  • Amplitude Modulation
  • Synthesis Method
  • Modulation Signal