Re: [LAU] [Sort of OT] Ringing in filters

On Wed, May 12, 2010 at 09:46:03AM +1000, Erik de Castro Lopo wrote:

> Fons Adriaensen wrote:
>
> > 2. the sum of the filter outputs equals the original input.
> >
> > This is a *hard* problem. Basically none of the classical filter
> > types have these properties. There are filter sets that can do
> > this but they are quite esoteric.
>
> Linkwitz-Riley filters:
>
> http://en.wikipedia.org/wiki/Linkwitz-Riley_filter
>
> I'm pretty sure they can just be converted to the digital domain
> using the bilinear transform.

L-R filters do *not* sum to the original signal. The amplitude
response of the sum is flat, but the phase response is not linear.

Ciao,

-- 
FA
O tu, che porte, correndo si ?
E guerra e morte !
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