scipy.io.wavfile.write

scipy.io.wavfile.write(filename, rate, data)

Write a numpy array as a WAV file.

Parameters:

filename : string or open file handle

Output wav file.

rate : int

The sample rate (in samples/sec).

data : ndarray

A 1-D or 2-D numpy array of either integer or float data-type.

Notes

• Writes a simple uncompressed WAV file.
• To write multiple-channels, use a 2-D array of shape (Nsamples, Nchannels).
• The bits-per-sample and PCM/float will be determined by the data-type.

Common data types: [R121]

WAV format	Min	Max	NumPy dtype
32-bit floating-point	-1.0	+1.0	float32
32-bit PCM	-2147483648	+2147483647	int32
16-bit PCM	-32768	+32767	int16
8-bit PCM	0	255	uint8

Note that 8-bit PCM is unsigned.

References

[R121]

(1, 2) IBM Corporation and Microsoft Corporation, “Multimedia Programming Interface and Data Specifications 1.0”, section “Data Format of the Samples”, August 1991 http://www.tactilemedia.com/info/MCI_Control_Info.html