FreeMat: WAVWRITE Write a WAV Audio File

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WAVWRITE Write a WAV Audio File

Section: Input/Ouput Functions

# Usage

The `wavwrite` funtion writes an audio signal to a linear PCM WAV file. The simplest form for its use is

        wavwrite(y,filename)

which writes the data stored in `y` to a WAV file with the name `filename`. By default, the output data is assumed to be sampled at a rate of 8 KHz, and is output using 16 bit integer format. Each column of `y` is written as a separate channel. The data are clipped to the range `[-1,1]` prior to writing them out. If you want the data to be written with a different sampling frequency, you can use the following form of the `wavwrite` command:

       wavwrite(y,SampleRate,filename)

where `SampleRate` is in Hz. Finally, you can specify the number of bits to use in the output form of the file using the form

       wavwrite(y,SampleRate,NBits,filename)

where `NBits` is the number of bits to use. Legal values include `8,16,24,32`. For less than 32 bit output format, the data is truncated to the range `[-1,1]`, and an integer output format is used (type 1 PCM in WAV-speak). For 32 bit output format, the data is written in type 3 PCM as floating point data.