[PD] feedback detection

[padawan12]

Feeback tends toward periodicity at 1/t for a delay of t
so you could do an autocorrelation (expensive - does Pd 
have an object to help with that?) of te feedback signal
to look for it. Since you know the frequency in advance
a simple bp filter is more effective. Not sure what you mean by
"dominant" part. If gain is greater than unity then it will
eventually be, but if you think of a Karplus=Strong it is by
definition once the excitory signal has vanished. Am I understanding
your question(?) if I say the best way is to simply monitor the amplitude
, because if G>1 the amplitude will *always* keep growing.

On Sun, 30 Jul 2006 19:07:12 -0400
Hans-Christoph Steiner <hans at eds.org> wrote:

> 
> Has anyone done anything with trying to detect feedback in a signal?   
> I am not looking so much for feedback suppression techniques, but  
> rather detection techniques.  I am working on a system that has a  
> slow feedback loop.  I want to detect when feedback is the dominant  
> part of the signal, and make the system respond in novel ways.
> 
> .hc
> 
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