Deharm is a Python GUI application that lets you distort the spectrum of a sound file by linearly shifting the frequencies so that the harmonic sounds become unharmonic. This happens because the frequencies that used to be multiples of each other get shifted so that they aren't any more.
This software requires at least Python version 3.8 or higher and it has been only tested on Python 3.9 with Windows 10 and Fedora. The operation under any other Python version or operating system is unknown.
Running the stand-alone Windows executable also requires FFMPEG. If you haven't
installed it yet get it from ffmpeg.org. If
you don't want to install FFMPEG for the whole system you can just copy the
FFMPEG executable files (ffmpeg.exe, ffplay.exe and ffprobe.exe from the
bin directory) to the same directory as deharm.exe.
Running the software in Linux also requires an FFMPEG installation. Generally it can be installed with whatever package manager is in use but for some distributions you may need to add non-free repositories. For Fedora you need the RPMfusion repositories. See here.
The Windows stand-alone executable can be found in the releases here.
Please note the FFMPEG requirement described above in the requirements!
Clone Deharm from GitHub using Git from command line:
git clone https://github.com/kzmo/deharm.git-OR-
Copy the Deharm directory into your python path. The zip file can be found here
In the command line fetch the requirements in the main repository directory
pip install -r requirements.txt-OR-
If pip is not in path you can install with Python command
python -m pip install -r requirements.txtNow you should be able to run Deharm simply by running deharm.py from the
src directory:
python deharm.pyDeharm can be also built into a Windows stand-alone .exe file. Follow the installation instructions above and install also PyInstaller:
pip install pyinstaller-OR-
python -m pip install pyinstallerThen run the build_windows.bat script in the command line in the build
directory
build_windows.batThe resulting deharm.exe file should be in the build\win_build
directory.
The "Low Cut-off" option is used to set the minimum frequency where the effect is applied on. This can be used for example to save the bassline and bass drums from being shifted.
Normally frequencies are shifted to lower frequencies but "Shift to High" switch can be used to shift the frequencies to higher frequencies.
If the processed sound has a jitter or a low frequency buzz, try to switch off the "short-time FFT" option or try different FFT block sizes.
FFT block sizes that are powers of 2 are much faster. For example: 512, 1024, 2048.
Increasing the FFT block size increases the frequency resolution so that the frequency options will match better to the actual frequencies.
Turning off the "short-time FFT" option will give you a very good frequency resolution.
Without the "short-time FFT" option some of the frequencies might play backwards due to phase reversal. This can be an interesting effect. But if it is unwanted then turn on the "short-time FFT".
The experimental decomposition options can be used to apply the effects only on harmonic or percussive components. The decomposition will slow down the processing significantly though.
Copyright (c) 2022 Janne Valtanen (janne.valtanen@infowader.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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