Fantastic article from start to finish. Great explanation, great audio samples, and from a first skim the C++ example looks very readable.

> I haven't found any good resources on this particular diffuser design. I found a couple of forum posts and a paragraph from a book

When I read this my first thought was "this is a link to a comment by mystran on KVR, isn't it?" And yep. If you're looking for some obscure DSP knowledge, all Google searches eventually lead to a comment by mystran.