Abstract
Resolving delay-free loops in recursive filter structures has been a longstanding problem approached in several different ways including signal flow graph manipulation [1], [2] and more recently with Zavalishin's instantaneous response technique [3],[4]. Härmä demonstrates a method for resolving delay-less loops in recursive filter structures [5] but the technique is limited to a specific generic loop topology in which the feedforward branch does not implement signal processing; all processing is implemented in one or more delay-less feedback loops. We modify Härmä's method to accommodate filter processing in the feedforward branch and provide a step-by-step method to resolve delay-less loops in recursive filter structures. We conclude with examples including a new method of synthesizing fourth order filters.
Original language | English (US) |
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Title of host publication | 137th Audio Engineering Society Convention 2014 |
Publisher | Audio Engineering Society |
Pages | 720-729 |
Number of pages | 10 |
ISBN (Print) | 9781634397483 |
State | Published - 2014 |
Event | 137th Audio Engineering Society Convention 2014 - Los Angeles, United States Duration: Oct 9 2014 → Oct 12 2014 |
Other
Other | 137th Audio Engineering Society Convention 2014 |
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Country | United States |
City | Los Angeles |
Period | 10/9/14 → 10/12/14 |
ASJC Scopus subject areas
- Modeling and Simulation
- Acoustics and Ultrasonics