SV: Re: SV: Re: SV: Re: SV: Re: [sdiy] Nonlinearities in IR3109 filters

[karl dalen]

--- Ian Fritz <ijfritz at comcast.net> skrev:

> At 01:51 PM 8/3/2006, karl dalen wrote:
> 
> >--- Ian Fritz <ijfritz at comcast.net> skrev:
> >
> > > At 09:01 PM 8/2/2006, karl dalen wrote:
> > >
> > > >?
> > > >Really?
> > > >Who uses delay in feedback part?
> > > >Hmm, how does that actually sound, could be worth a try!?
> > >
> > >
> > > This is used in physical modeling of instruments:
> > >
> > > http://www.soundonsound.com/sos/1997_articles/jul97/ronberry.html
> > > http://home.earthlink.net/~ijfritz/pm_close.htm
> >
> >Yes i know, but what we was discussing was delay
> >used in the *feedback path of a filter*, not filter-feedback-paths
> >in pyhs models. Not the same thing Ian!
> >
> >KD
> 
> 
> That's a pretty fine distinction.  The output of the filter is sent back to 
> its input after a delay.  It doesn't matter if it is actually built into 
> the filter module.  The delay is part of the feedback circuit.

Well, depends *where* in the pole chain you take out your
feedback signal. And what if in these filter topologies 
in wich one has several feedback paths? You dont 
neccecrily have to take the feedback signal from
the last stage.

Anyhow if you ping a high resonant filter it does that
damped sine thing but a high resonant K/S cell does
something different it builds up resonances around
the shape of the ping signal.

KD