[sdiy] Low Cost Comb Filter Methods

Neil Johnson neil.johnson71 at gmail.com
Tue Jun 12 10:28:26 CEST 2018

Hi Brian,

> Yet it still seems interesting that the AES saw fit to publish a paper with this title in June of 1974 from a member of the department of electrical engineering of Ohio University, and they did not add any editorial about the terminology.

It seems to me the world of electronic music is full of fundamental
misunderstandings of technical terminology:
1/ Chowning's FM is actually PM
2/ Ring modulator when most of the time they're talking about a
product modulator

> Meanwhile, the help I was looking for was commentary on whether a 3-capacitor op-amp circuit would actually be straightforward to simulate / emulate in software. One of these days I’m going to have to learn how to use the Z-transform to convert a circuit diagram into lines of code. Seems like it should require only three words of state memory and a few cycles of

Two common methods:
1/ Runtime SPICE simulation
2/ Extract the transfer equation in the s-domain, then convert to the
z-plane using the bilinear transform


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