wavio
is a Python module that defines two functions:
wavio.read
reads a WAV file and returns an object that holds the sampling rate, sample width (in bytes), and a numpy array containing the data.wavio.write
writes a numpy array to a WAV file, optionally using a specified sample width.
The module uses the wave
module in Python's standard library, so it has the same limitations as that module. In particular, it does not support compressed WAV files, and it does not handle floating point WAV files. (When floating point data is passed to wavio.write
it is converted to integers before being written to the WAV file.) The functions can read and write 8-, 16-, 24-and 32-bit integer WAV files.
wavio
has been tested with Python versions 2.7, 3.4 and 3.5.
wavio
depends on numpy (http://www.numpy.org). It has been tested with versions 1.8.1, 1.9.0 and 1.10.1, and will likely work with older versions.
The package has a suite of unit tests, but it should still be considered prototype-quality software. There may be backwards-incompatible API changes between releases.
The following code (also found in the docstring of wavio.write
) writes a three second 440 Hz sine wave to a 24-bit WAV file:
import numpy as np
import wavio
rate = 22050 # samples per second
T = 3 # sample duration (seconds)
f = 440.0 # sound frequency (Hz)
t = np.linspace(0, T, T*rate, endpoint=False)
x = np.sin(2*np.pi * f * t)
wavio.write("sine24.wav", x, rate, sampwidth=3)
- Author
Warren Weckesser
- Repository
- License
BSD 2-clause (http://opensource.org/licenses/BSD-2-Clause)