Frequency-dependent schroeder allpass filters
Schlecht SJ (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 10
Article Number: 187
Journal Issue: 1
DOI: 10.3390/app10010187
Abstract
Since the introduction of feedforward-feedback comb allpass filters by Schroeder and Logan, its popularity has notdiminished due to its computational efficiency and versatile applicability in artificial reverberation, decorrelation, and dispersive system design. In this work, we present an extension to the Schroeder allpass filter by introducing frequency-dependent feedforward and feedback gains while maintaining the allpass characteristic. By this, we directly improve upon the design of Dahl and Jot which exhibits a frequency-dependent absorption but does not preserve the allpass property. At the same time, we also improve upon Gerzon's allpass filter as our design is both less restrictive and computationally more efficient. We provide a complete derivation of the filter structure and its properties. Furthermore, weillustrate the usefulness of the structure by designing an allpass decorrelation filter with frequency-dependent decay characteristics.
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Finland (FI)How to cite
APA:
Schlecht, S.J. (2020). Frequency-dependent schroeder allpass filters. Applied Sciences, 10(1). https://doi.org/10.3390/app10010187
MLA:
Schlecht, Sebastian J.. "Frequency-dependent schroeder allpass filters." Applied Sciences 10.1 (2020).
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