Designing Audio Effect Plugins in C++, 2nd Edition

Chapter 12Audio Filter Designs: Wave Digital and Virtual Analog

Wave digital filters (WDFs) are designed to simulate analog electronic circuits, and do not use any biquadratic structures. The idea dates to 1970, but the seminal paper published on the topic didn’t arrive until Fettweis’s “Wave Digital Filters: Theory and Practice” in 1986. This 327-page document is a highly detailed treatise on the subject. If you are at all interested in this topic, it is the first document you should get. There are more references in the chapter bibliography. The interest in WDFs seems to come and go; however, a recent release of a WDF simulation software package called RT-WDF in 2016 has brought it back into the spotlight. The RT-WDF software can be used to ...