Pydiogment

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Pydiogment aims to simplify audio augmentation. It generates multiple audio files based on a starting mono audio file. The library can generates files with higher speed, slower, and different tones etc.

Installation

Dependencies

Pydiogment requires:

• Python (>= 3.5)

• NumPy (>= 1.17.2)

• SciPy (>= 1.3.1)

• FFmpeg

On Linux

On Linux you can use the following commands to get the libraries:

• Numpy: pip install numpy
• Scipy: pip install scipy
• FFmpeg: sudo apt install ffmpeg

On Windows

On Windows you can use the following installation binaries:

• Numpy: https://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy or if you have Python already installed you can use install it using pip3 install numpy
• Scipy: https://www.lfd.uci.edu/~gohlke/pythonlibs/#scipy
• FFmpeg: https://ffmpeg.org/download.html#build-windows

On MacOS

On MacOs, use homebrew to install the packages:

• Numpy: brew install numpy --with-python3
• Scipy: You need to first install a compilation tool like Gfortran using homebrew brew install gfortran when it’s done, install Scipy pip install scipy
  for more information and guidelines you can check this link: https://github.com/scipy/scipy/blob/master/INSTALL.rst.txt#mac-os-x
• FFmpeg: brew install ffmpeg

Installation

If you already have a working installation of NumPy and SciPy , you can simply install Pydiogment using pip:

pip install pydiogment

To update an existing version of Pydiogment, use:

pip install -U pydiogment

How to use

• Amplitude related augmentation

  • Apply a fade in and fade out effect

    from pydiogment.auga import fade_in_and_out
    test_file = "path/test.wav"
    fade_in_and_out(test_file)

  • Apply gain to file

    from pydiogment.auga import apply_gain
    test_file = "path/test.wav"
    apply_gain(test_file, -100)
    apply_gain(test_file, -50)

  • Add Random Gaussian Noise based on SNR to file

    from pydiogment.auga import add_noise
    test_file = "path/test.wav"
    add_noise(test_file, 10)

• Frequency related augmentation

  • Change file tone

    from pydiogment.augf import change_tone
    test_file = "path/test.wav"
    change_tone(test_file, 0.9)
    change_tone(test_file, 1.1)

• Time related augmentation

  • Slow-down/ speed-up file

    from pydiogment.augt import slowdown, speed
    test_file = "path/test.wav"
    slowdown(test_file, 0.8)
    speed(test_file, 1.2)

  • Apply random cropping to the file

    from pydiogment.augt import random_cropping
    test_file = "path/test.wav"
    random_cropping(test_file, 1)

  • Change shift data on the time axis in a certain direction

    from pydiogment.augt import shift_time
    test_file = "path/test.wav"
    shift_time(test_file, 1, "right")
    shift_time(test_file, 1, "left")

• Audio files format

  This library currently supports mono WAV files only.

Documentation

A thorough documentation of the library is available under pydiogment.readthedocs.io.

Contributing and bugs report

Contributions are welcome and encouraged. To learn more about how to contribute to Pydiogment please refer to the Contributing guidelines

To report bugs, request a feature or just ask for help you can refer to the issues section.
Before reporting a bug please make sure it is not addressed by an older issue and make sure to add your operating system type, its version number and the versions of the dependencies used.

Acknowledgment and credits

• The test file used in the pytests is OSR_us_000_0060_8k.wav from the Open Speech Repository.