Physical modelling... SV: Re: [sdiy] standard filters from ladder topology?

[karl dalen]

I agree with Magus in that for ordinary filtering purpose
(filtering coposite wave forms)the effect is quite marginal
to be worth the effort wheter its butterwort,chebyshew ,cauer
etc.

But you say, subtle changes of phases in passband
for physical modelling with a BBD, so why use a 
filter in the first place?

What is the BBD supposed to do? Resonator?

If you are using it as a delay line to do lin FM (Phase)
then phases will cause differences, as so are feedback
in delay line, but why not try out accurate phase stages
instead of a filter! Phases could make major differences
in a resonating tube for instance, if thats the use of 
the BBD!

KD  

--- "JH." <jhaible at debitel.net> skrev:

> > I could see the ebenfit to making a voltage tuned filter
> > with specific response... but I have some doubts as to
> > how it would sound in a synth application. I'd expect that
> > the difference would be subtle as best ???
> 
> It's about a filter for BBD-based physical modelling.
> Subtle changes in the passband might alter the overtones on
> which the whole thing is resonating. Or maybe it
> doesn't make a difference. I just want to be prepared.
> 
> JH.
>