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## Read and write WAV files using Python (wave)

Get x values of the sine wave. Amplitude of the sine wave is sine of a variable like time. Plot a sine wave using time and amplitude obtained for the sine wave. Give a title for the sine wave plot. Give x axis label for the sine wave plot. Give y axis label for the sine wave plot. Display the sine wave. Toggle navigation Pythontic. Sine waves have the shape of sine curve. The X-axis of the sine curve represents the time. The Y-axis of the sine curve represents the amplitude of the sine wave. The amplitude of the sine wave at any point in Y is proportional to the sine of a variable. A cycle of sine wave is complete when the position of the sine wave starts from a position and comes to the same position after attaining its maximum and minimum amplitude during its course. The time taken to complete one cycle is called the period of the sine wave. The frequency of the sine wave is given by number of cycles per second. The distance covered by a cycle measures the wavelength of the sine wave. Examples of sine waves include the oscillations produced by the suspended weight on spring and the alternating current. NumPy has the sin function, which takes an array of values and provides the sine value for them. Using the numpy sin function and the matplotlib plot a sine wave can be drawn. Example: import numpy as np import matplotlib.

## The Sound Archive

Released: Nov 25, View statistics for this project via Libraries. Tags audio, libsndfile. SoundFile can read and write sound files. SoundFile represents audio data as NumPy arrays. SoundFile has evolved rapidly during the last few releases. Most notably, we changed the import name from import pysoundfile to import soundfile in 0. Also, the order of arguments of the write function changed from write data, file, The old ctype arguments still work, but are now officially deprecated. In a modern Python, you can use pip install soundfile to download and install the latest release of SoundFile and its dependencies. On Windows and OS X, this will also install the library libsndfile. If you are running on an unusual platform or if you are using an older version of Python, you might need to install NumPy and CFFI separately, for example using the Anaconda package manager or the Unofficial Windows Binaries for Python Extension Packages. Data can be written to the file using soundfile. Sound files can also be read in short, optionally overlapping blocks with soundfile. For example, this calculates the signal level for each block of a long file:. Sound files can also be opened as soundfile. SoundFile objects. Every SoundFile has a specific sample rate, data format and a set number of channels. If a file is opened, it is kept open for as long as the SoundFile object exists. The file closes when the object is garbage collected, but you should use the soundfile. All data access uses frames as index. A frame is one discrete time-step in the sound file. Every frame contains as many samples as there are channels in the file. Pysoundfile can usually auto-detect the file type of sound files. This is not possible for RAW files, though:. You can write RAW files in a similar way, but be advised that in most cases, a more expressive format is better and should be used instead. Note that the above example only works with Python 3. For Python 2. Writing to OGG files can result in empty files with certain versions of libsndfile. See for news on this issue. Again, thanks to Matthias Geier for all of his hard work, but also Nils Werner and Whistler7 for their many suggestions and help. Nov 25, Apr 19, Mar 2, Feb 3, Feb 2, Oct 22,