Stepped Notch Filter — User Guide

Praat script.

Author: Shai Cohen Affiliation: Department of Music, Bar-Ilan University, Israel Version: 0.1 (2025) License: MIT License Repo: https://github.com/ShaiCohen-ops/Praat-plugin_AudioTools

Contents:

What this does Quick start Parameters Outputs

What this does

Praat script.

Process Description: This script applies up to two distinct notch filters and a global attenuation directly in the frequency domain (Spectrum object). This technique is a form of spectral equalization where precise frequency bands are sharply reduced in amplitude, combined with an overall reduction of non-notched frequencies for loudness normalization. This results in an immediate and non-resonant shaping of the sound's timbre.

Quick start

In Praat, select a Sound object.
Run script… → Stepped Notch Filter.praat.
Set parameters and click OK.
Output object appears (see Outputs).

Parameters (form fields)

Name (GUI)	Type	Default
fast_fourier	boolean	yes
notch1_lower	positive	2000
notch1_upper	positive	2200
notch1_attenuation	positive	0.1
notch2_lower	positive	5500
notch2_upper	positive	5800
notch2_attenuation	positive	0.2
overall_attenuation	positive	0.7
scale_peak	positive	0.9
play_after_processing	boolean	1
keep_intermediate_objects	boolean	0

Outputs

Object name: output
Sample rate: unknown
Normalization: No automatic normalization