Robuta

https://www.wolfram.com/mathematica/new-in-9/built-in-signal-processing/create-filters-from-a-lowpass-prototype.html

Create Filters from a Lowpass Prototype: New in Mathematica 9

create filters lowpass prototype new

https://www.ffmpeg.org/doxygen/trunk/structLowpass.html

FFmpeg: Lowpass Struct Reference

ffmpeg lowpass struct reference