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Frequency-Dependent Directional Feedback Delay Network

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publication2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
ISBN (Electronic)978-1-5090-6631-5
Publication statusPublished - 4 May 2020
Publication typeA4 Article in a conference publication
EventInternational Conference on Acoustics, Speech, and Signal Processing - Virtual, Barcelona, Spain
Duration: 4 May 20208 May 2020
Conference number: 45th


ConferenceInternational Conference on Acoustics, Speech, and Signal Processing
Abbreviated titleICASSP 2020
Internet address


A recent publication introduced the Directional Feedback Delay Network, a parametric artificial reverberation algorithm capable of producing direction-dependent energy decay. This method extends the capabilities of Feedback Delay Networks by using multichannel delay-line groups and a spatial transform to produce direction-dependent reverberation in the Ambisonics domain. In this paper, we present a modified formulation of the Directional Feedback Delay Network method that allows both frequency-and direction-dependent reverberation. Multichannel delay-line groups are used to manipulate signals incident on a spherical grid through independent recursive signal paths, while an early reflection module gives a physically-motivated spatial distribution of input signals in the system. The overall number of delay lines is reduced from the previous formulation, and the design allows flexibility to favor a lower computational cost over accuracy.

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