IIR Filter Explorer
The IIR Filter Explorer is a tool enabling the rapid interactive design of basic Infinite Impulse Response digital filters. At present, the tool supports Butterworth, Chebyshev (type I and II) and Elliptic filters up to 20th order, in low-pass, high-pass, band-pass and notch configurations.
As well as the visual display, there is an option to audition the effect of the filter on a variety of waveforms. An example 'C' implementation of the selected filter is output, for copying to your own project. The implementation can be Nth order for brevity, or a series of biquads for improved stability in more extreme filters.
frq pha hpha grpdly s-frq
Input: octave: show play