The octave-forge package is the result of The GNU Octave Repository project,
which is intended to be a central location for custom scripts, functions and
extensions for GNU Octave. contains the source for all the functions plus
build and install scripts.

This is dsppack.

 GUI tool for designing and analysing IIR/FIR digital filters: magnitude, phase
and pole-zero responses, stability analysis, audio demo, and code export.