Analog Filters -> Digital

[Tom Duff]

On Feb 3, 11:55am, Brian Patrick Towles wrote:

> for a class design project, i've tricked my group into programming a
> software vocoder :)  we're going to implement the filterbanks as discrete
> bandpass filters - the same way analog vocoders work.  however, none of
> the group members knows a good approach to designing these digital
> filters.

Ken Stieglitz's Meteor, at
http://www.cs.princeton.edu/~ken/meteor.html
is an excellent digital filter design program.

You can give it an input specification that
gives (piecewise linear) bounds on frequency
response, and how many taps you're willing
to suffer and it will find an optimal filter
under those constraints.

-- 
Tom Duff.  A cross between a bassoon and a fire extinguisher.