MatthewA <matthewaudio@gmail.com> writes:

> Hi all,
>
> I'm hoping to program an effect with convolution, long tap delay and
> feedback. I'm wondering what some strategies are to keep it from
> feeding back. 

If the total system (including feedback) can be modeled as a rational
z-transform (assuming you're talking about a digital system), and I
think it can be, and if by "keep it from feeding back" you mean "keep it
stable" (i.e., so that the output does not "blow up"), then the answer
is that your feedback must be constrained so that there are no 
poles outside the unit circle. In other words, the denominator of the
rational z-transform expression must not contain any zeros that are 
outside of the unit circle.

> [...]
> Any reading would be appreciated.

Google z-transforms, IIR, stability.
-- 
Randy Yates, DSP/Embedded Firmware Developer
Digital Signal Labs
http://www.digitalsignallabs.com

Hi all,

I'm hoping to program an effect with convolution, long tap delay and feedback.  I'm wondering what some strategies are to keep it from feeding back.  The idea was to use a sine sweep as the kernel so that each iteration became more slewed.

I'm open to altering the kernel as well. 

Sorry if this is a noob question. Any reading would be appreciated.
-Matt