wav.js

Currently there is not a whole lot here but it will let you create .wav files in a pretty straightforward way. The only public function in the module is create, you call it like this:

var wave = wav.create(1, 44100, wav.SampleSize.EIGHT);

• The first argument (1) is the number of channels (e.g. 2 for stereo, 1 for mono, etc)
• The second argument (44100) is the sampling frequency in Hz.
• The third argument (wav.SampleSize.EIGHT) is just an integer and is the number of bits per sample. I created a little enumeration since, in theory you could pass anything in here but in practice I am too lazy to figure out the calculations required to deal with anything. Have a look at the SampleSize enumeration for the allowed values.

Now that you have a wave object you can call the handy addSample function on it like so:

wave.addSample(123);

There are a few methods available:

• addSampleToAllChannels - This adds the sample sample to all the output channel
• getDataChunkSize - This gets the size of the data chunk
• getTotalSampleCount - This gets the total number of samples
• getSampleCountInOneChannel - This gets the sample count in a single channel
• getFrequency - This returns the sampling frequency of the wav file.
• getChannelCount - This returns the nmber of channels in the wav file
• getSampleSize - The returns the number of bits per sample