augaudio

This package contains multiple simple audio data augmentations in order to increase/test the robustness of neural networks.

Original

Gaussian Noise

Pitch Shift

Time Stretch

Crush

Installation

You can install this package via pip install augaudio

Usage

Example usage:

import librosa
import augaudio
import soundfile

y, sr = librosa.load('audio.wav')

augmented = augaudio.augment(y, 1, 4)

soundfile.write('augmented.wav', augmented, sr)

Directly access one of the augmentations:

...
augmented = augaudio.GaussianNoise(y, 4)
...

Chain augmentations together:

...
augmented = augaudio.GaussianNoise(augaudio.TimeStretch(y, 2), 4)
...

Iterate over augmentations:

...
for augmentation in range(4):
  for intensity in range(1,10):
    augmented = augaudio.augment(y, augmentation, intensity)
    soundfile.write(str(augmentation) + '-' + str(intensity) + '.wav', augmented, sr)
...

Command Line Usage:

Single File:

augaudio /path/to/audio.wav 0 5

Complete Folder:

augaudio /path/to/input 0 5 /path/to/output

Augmentations

Augmentation	index	Description	negative intensity
Augmentations	-2	Applies /multiple/ random augmentations	available
Random	-1	Applies random augmentation	available
GaussianNoise	0	Applies gaussian noise to the audio data	n/a
PitchShift	1	Shifts the pitch of the audio data	available
TimeStretch	2	Stretches the time of the audio data	n/a
Crush	3	Crushes details by applying and reversing a pitch shift	available

Copyright Notice

Copyright 2020 Bastian Schwickert

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.