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# 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: [R94]

  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

  [R94] | (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-mmsp.ece.mcgill.ca/documents/audioformats/wave/Docs/riffmci.pdf