write#
- scipy.io.wavfile.write(filename, rate, data)[source]#
- Write a NumPy array as a WAV file. - Parameters:
- filenamestring or open file handle
- Output wav file. 
- rateint
- The sample rate (in samples/sec). 
- datandarray
- 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: [1] - 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 [1]- 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 - Examples - Create a 100Hz sine wave, sampled at 44100Hz. Write to 16-bit PCM, Mono. - >>> from scipy.io.wavfile import write >>> import numpy as np >>> samplerate = 44100; fs = 100 >>> t = np.linspace(0., 1., samplerate) >>> amplitude = np.iinfo(np.int16).max >>> data = amplitude * np.sin(2. * np.pi * fs * t) >>> write("example.wav", samplerate, data.astype(np.int16))