Fade-In Control for Feedback Delay Networks

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Conference article in proceedings
Date
2020-09
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Language
en
Pages
7
227-233
Series
Proceedings of the 23rd International Conference on Digital Audio Effects (DAFx2020), Proceedings of the International Conference on Digital Audio Effects
Abstract
In virtual acoustics, it is common to simulate the early part of a Room Impulse Response using approaches from geometrical acous-tics and the late part using Feedback Delay Networks (FDNs). In order to transition from the early to the late part, it is useful to slowly fade-in the FDN response. We propose two methods to con-trol the fade-in, one based on double decays and the other based on modal beating. We use modal analysis to explain the two con-cepts for incorporating this fade-in behaviour entirely within the IIR structure of a multiple input multiple output FDN. We present design equations, which allow for placing the fade-in time at an arbitrary point within its derived limit.
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Citation
Meyer-Kahlen , N , Schlecht , S & Lokki , T 2020 , Fade-In Control for Feedback Delay Networks . in Proceedings of the 23rd International Conference on Digital Audio Effects (DAFx2020) . Proceedings of the International Conference on Digital Audio Effects , DAFx , pp. 227-233 , International Conference on Digital Audio Effects , Vienna , Austria , 09/09/2020 . < https://dafx2020.mdw.ac.at/proceedings/papers/DAFx2020_paper_47.pdf >