audioman

Python library for manipulating audio files. This can be used for editing audio, or tagging audio.

Installation

Install audioman using pip

pip install audioman

Audio

Audio editing here is done using the audio samples represented in a numpy array. Although, it is easy to combine audio together without touching the samples.

First we load the audio.

from audioman import Audio

audio = Audio('audio.wav')

Or we can load using raw samples

import numpy
from audioman import Audio

audio = Audio(numpy.array([[0,0,0,0,0]]), sample_rate = 4400)

Once you're done modifying the audio file, you can save it.

audio.save('modified.wav')

If you don't specify a filename, it will use self.filename, but since that is usually lost when modifying the audio, it's best to specify the filename anyway.

Audio objects are can be combined

from audioman import Audio

audio1 = Audio('audio1.wav')
audio2 = Audio('audio2.wav')

audio3 = audio1 + audio2

len(audio3) # len(audio1) + len(audio2)

You can also increase the gain.

audio = Audio('audio.wav')
audio2 = audio + 5

The original audio object does not get modified.

Trimming audio is also easy.

audio = Audio('audio.wav')
trimmed = audio.trim(start = 0, length = audio.seconds_to_samples(3))

Of course if you only specify the length, the start will be assumed to be 0.

trimmed = audio.trim(audio.seconds_to_samples(3))
trimmed.samples_to_seconds(len(trimmed)) # 3.0

If you wish to, you can also split the audio in 2 audio tracks.

audio1, audio2 = audio.split()

By default it will split in half, but you can specify the middle.

audio1, audio2 = audio.split(audio.seconds_to_samples(3))

If you wish to do so, you can add silence to an audio track.

audio2 = audio.add_silence(start = 0, length = audio.seconds_to_samples(3))

Of course if you want to add to the end, you can use -1

audio2 = audio.add_silence(start = -1, length = audio.seconds_to_samples(3))

If you omit start, it will set it to 0.

audio2 = audio.add_silence(audio.seconds_to_samples(3))

If you need to mix (overlay) two audio tracks together, use the .mix() method.

audio = Audio('audio.wav')
drums = Audio('drums.wav')

mixed = audio.mix(drums)

Effects

There are effects that you can apply to audio. Currently the only effect is an adjustable fade, but you can make your own easily.

To use effects, create an effect object, and apply the options.

from audioman import Audio
from audioman.effect import AdjustableFade

audio = Audio('audio.wav')

fade = AdjustableFade(length = audio.seconds_to_samples(3), gain0 = 0, gain1 = 1, fade_adjust = -1)
faded = audio.apply_effect(fade, start = audio.seconds_to_samples(-3))

You can find all the options for an effect in the .OPTIONS property.

from audioman.effect import AdjustableFade

print(AdjustableFade.OPTIONS)

""" stdout:
{
    'gain0': {
        'default': 1,
        'type': float,
    },
    'gain1': {
        'default': 0,
        'type': float,
    },
    'curve_ratio': {
        'default': 0,
        'type': float,
    }
}
"""