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FilterDeMystifier (no mysteries, just math) is a filter plug-in for educational use. It will show you how a few poles and zeros define the sound of equalisers or vocal filters.
Everything is visualised and you can see the transfer function and the resulting magnitude z-plane in a rotatable 3D plot.
Check out the presets to see what can be realised with this straight-forward GUI.
Please be aware that this plug-in can generate very unpleasant sound, if the security measures are switched off.
Have fun and read the manual, if you are interested in digital signal processing.
The source-code is available at: https://github.com/ArnoSchiller/FilterDeMystifier
It started as a course work for the final exam in DAFX (Digital Audio Effects) at our University (Jade Hochschule).