[music-dsp] Design of IIR Filters

Smartelectronix - Bram de Jong bram at smartelectronix.com
Fri Jan 9 00:35:01 EST 2004

Nigel Redmon <earlevel at earlevel.com> wrote:
> There are a few things up on my site on filters (they are essential
> sidebars to a larger article I wrote a year ago, but just haven't had
> the time to finish and put it up). Take a look at the bilinear
> transform, as it's a nice thing to understand, and there's a pole/zero
> placement applet to play with:
> http://www.earlevel.com/Digital%20Audio/FilterIndex.html

there's also:
which does approximatly the same as that Java thingy, but
lets you HEAR the result too as it's a VST plugin.
And you can visualise the Z-plane as 3D nifty little
graphic :-)

> On Jan 8, 2004, at 1:07 PM, David Ross wrote:
>> Hi Al,
>> Thanks for your help. I have downloaded QE DEsign demo and am
>> currently having fun playing with poles and zeros, its amazing what
>> they do when you think about it :-) Cheers for the advice about the
>> books too,
>> David

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