Differentiable Feedback Delay Network For Colorless Reverberation

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Abstract

Artificial reverberation algorithms often suffer from spectral coloration, usually in the form of metallic ringing, which impairs the perceived quality of sound. This paper proposes a method to reduce the coloration in the feedback delay network (FDN), a popular artificial reverberation algorithm. An optimization framework is employed entailing a differentiable FDN to learn a set of parameters decreasing coloration. The optimization objective is to minimize the spectral loss to obtain a flat magnitude response, with an additional temporal loss term to control the sparseness of the impulse response. The objective evaluation of the method shows a favorable narrower distribution of modal excitation while retaining the impulse response density. The subjective evaluation demonstrates that the proposed method lowers perceptual coloration of late reverberation, and also shows that the suggested optimization improves sound quality for small FDN sizes. The method proposed in this work constitutes an improvement in the design of accurate and high-quality artificial reverberation, simultaneously offering computational savings.
Original languageEnglish
Title of host publicationProceedings of the 26th International Conference on Digital Audio Effects (DAFx23)
EditorsFederico Fontana, Silvin Willemsen
Place of PublicationCopenhagen, Denmark
PublisherAalborg University
Pages244-251
Number of pages8
Publication statusPublished - 4 Sept 2023
MoE publication typeA4 Conference publication
EventInternational Conference on Digital Audio Effects - Aalborg University Copenhagen, Copenhagen, Denmark
Duration: 4 Sept 20237 Sept 2023
Conference number: 26
https://dafx23.create.aau.dk/

Publication series

NameProceedings of Audio Effects Conference
PublisherAalborg University Copenhagen
ISSN (Electronic)2413-6689

Conference

ConferenceInternational Conference on Digital Audio Effects
Abbreviated titleDAFx
Country/TerritoryDenmark
CityCopenhagen
Period04/09/202307/09/2023
Internet address

Keywords

  • Audio Signal Processing
  • Audio Effects
  • Reverb Algorithm
  • Feedback Delay Network
  • Artificial Reverberation

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