Monthly Archives: October 2014

Parametric EQ in python

Lately in my free time i’ve been writing a parametric equalizer in python, mostly as a part of a self-learning process of equalization in digital domain (using IIR filters) and to learn more python. I used pyaudio for sound, scipy for all dsp, pyside for GUI. I initially used pyqtgraph for plotting but it turned out to have too many things not working in it’s current version so i realized i would probably spend less time coding my own plotting…In the and I needed to override paint event for other functionality anyway so that was probably the right decision…

It is not exactly finished and isn’t meant to be: It is a free-time hobby “project” after all , nothing innovative. It does it’s job: opens a wave file and allows You too have fun with the filters in real time. I learned a lot coding this, hopefully someone , someday will learn something from it too.

I intend to write a post or two that talk in details about the biggest challenges i encountered while writing the program.

I created the repository on GitHub with the project. You can get there through sources section of this blog and see the code there. (Please don’t mind the lack of comments in many places and naming inconsistency…i wanted to just make it work first and then clean it :)

Screen of the equalizer:

screenshot

Advertisements