Audio

Load .wav file

To load a wav file as a Document.

from docarray import Document

d = Document(uri='toy.wav').load_uri_to_audio_tensor()

print(d.tensor.shape, d.tensor.dtype)

(30833,) float32

Save as .wav file

You can save Document .tensor as a .wav file:

d.save_audio_tensor_to_file('toy.wav')

Example

Let’s load the “hello” audio file, reverse it and finally save it.

from docarray import Document

d = Document(uri='hello.wav').load_uri_to_audio_tensor()
d.tensor = d.tensor[::-1]
d.save_audio_tensor_to_file('olleh.wav')

hello.wav	olleh.wav

Other tools & libraries for audio data

By no means you are restricted to use DocArray native methods for audio processing. Here are some command-line tools, programs and libraries to use for more advanced handling of audio data:

• FFmpeg is a free, open-source project for handling multimedia files and streams.

• pydub: manipulate audio with a simple and easy high level interface

• librosa: a python package for music and audio analysis.

• pyAudioAnalysis: for IO or for more advanced feature extraction and signal analysis.