Intro to the "Dattorro" reverb structure

As far as I can tell, the vast majority of FV-1 reverbs use variations on the structure defined in this paper published in September 1997 by Jon Dattorro. Hey, that's relatively recent; only 25 years ago. The author claims several times that this structure is good for plate reverb emulation.

The small reverb we've been looking at recently is even further simplified in that:

• There are only 2 all-pass/delay line pairs in the "tank"

• There is no modulation of the all-passes

• There is no damping filter or other explicit tone control anywhere

I've noticed that in the online archive of FV-1 programs, several are called out specifically as "Dattorro" reverbs, although I don't think I've ever encountered the term in Spin's documentation. We'll take a look at some of these in a future article.

Here is the Spin Knowledge Base section showing a very Dattorro-like structure.