All about audio equalization: Solutions and frontiers

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Queen Mary University of London

Abstract

Audio equalization is a vast and active research area. The extent of research means that one often cannot identify the preferred technique for a particular problem. This review paper bridges those gaps, systemically providing a deep understanding of the problems and approaches in audio equalization, their relative merits and applications. Digital signal processing techniques for modifying the spectral balance in audio signals and applications of these techniques are reviewed, ranging from classic equalizers to emerging designs based on new advances in signal processing and machine learning. Emphasis is placed on putting the range of approaches within a common mathematical and conceptual framework. The application areas discussed herein are diverse, and include well-defined, solvable problems of filter design subject to constraints, as well as newly emerging challenges that touch on problems in semantics, perception and human computer interaction. Case studies are given in order to illustrate key concepts and how they are applied in practice. We also recommend preferred signal processing approaches for important audio equalization problems. Finally, we discuss current challenges and the uncharted frontiers in this field. The source code for methods discussed in this paper is made available at https://code.soundsoftware.ac.uk/projects/allaboutaudioeq.

Details

Original languageEnglish
Article number129
JournalAPPLIED SCIENCES
Volume6
Issue number5
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Acoustic signal processing, Audio systems, Digital filters, Digital signal processing, Equalizers, Infinite impulse response filters, Music technology

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