spectrum_to_filtercurve_preset

Turn wavefile spectrum to FilterCurve profile (Audacity Helper)

This simple utility takes as input the textfile generated by the [Export...] button in Audacity's Analyze>Plot spectrum... view, and produces another textfile can be conveniently imported as a preset in Audacity FilterCurve EQ effect. It can be handy if you wish to apply the frequency response of a reference audio file to another one.

In order to achieve the desired result, you should follow these steps:

1. In Audacity, export the Plot spectrum of the track you want to modify (track1) to spectrum1.txt
2. In Audacity, export the Plot spectrum of the track you want track1 to sound like (track2) to spectrum2.txt
3. Run spectrum_to_filtercurve_preset.py on both spectrum1.txt and spectrum2.txt (you'll obtain spectrum1_eq.txt and spectrum2_eq.txt)
4. In Audacity, open track1 and go to Effect>FilterCurve EQ, import spectrum1_eq.txt as a preset, INVERT IT and apply it
5. With track1 open in Audacity, go to Effect>FilterCurve EQ, import spectrum2_eq.txt as a preset and apply it

(Note: the script performs no math on the frequencies or the values, so it can equally manage both dot and comma as a decimal separator)