FFT-based dynamic range compression

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Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2017-07-05
Major/Subject
Mcode
Degree programme
Language
en
Pages
42-49
Series
Proceedings of the 14th Sound and Music Computing Conference, Proceedings of the Sound and Music Computing Conferences
Abstract
Many of the dynamic range compressor (DRC) designs that are deployed in the marketplace today are constrained to operate in the time-domain; therefore, they offer only temporally dependent control of the amplitude envelope of a signal. Designs that offer an element of frequency dependency, are often restricted to perform specific tasks intended by the developer. Therefore, in order to realise a more flexible DRC implementation, this paper proposes a generalised time-frequency domain design that accommodates both temporally-dependent and frequency-dependent dynamic range control; for which an FFT-based implementation is also presented. Examples given in this paper reveal how the design can be tailored to perform a variety of tasks, using simple parameter manipulation; such as frequency-depended ducking for automatic-mixing purposes and high-resolution multi-band compression.
Description
Keywords
Audio systems, acoustic signal processing
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Citation
McCormack , L & Välimäki , V 2017 , FFT-based dynamic range compression . in T Lokki , J Pätynen & V Välimäki (eds) , Proceedings of the 14th Sound and Music Computing Conference . Proceedings of the Sound and Music Computing Conferences , Aalto University , Espoo, Finland , pp. 42-49 , Sound and Music Computing Conference , Espoo , Finland , 05/07/2017 . < http://smc2017.aalto.fi/media/materials/proceedings/SMC17_p42.pdf >