feeding current output to current tick

[Hiroko Shiraiwa-Terasawa]

> I've been looking at this, and don't see how it works...
> by definition the feedback should be delayed... ie it should come out 
> only after you have made an output.. hence Y(n-1) <-> y * z^-1
> So what is the problem?
> Plus, "delay free" loops are impossible to implement in the digital domain.

feedback filters: 
You have a delay at the direct path from x to y, but by definition, you 
don't have delay at the feedback (recursive) path. the idea is to read one 
sample ahead and provide it at the next turn. 

-- 
Hiroko Terasawa 
<hiroko@ccrma.stanford.edu>