That's an audio sample class, accepting a Float32Array in the constructor with one public function. It turns that Float32 into a buffer with the most fastest algorithm.
This within ~20 code lines only by reusing other useful node modules. It cannot get faster and shorter. If I am wrong, let me know and I'll fix that asap.
This component is very useful for turning raw WebAudio samples, which are in Float32, into a buffer with 16 bit signed integers while respecting endianness.
npm i -S audio-sample
How to use
// just an example, this array can come from the first audio channel of a webcam (getUserMedia) var arrayOfFloats = e.inputBuffer.getChannelData(0) // create a single audio sample instance var audioSample = new AudioSample(new Float32Array(arrayOfFloats)) // and now, convert it into a buffer super-fast var buffer = audioSample.toBuffer() // then you can send this buffer easily over to the server and do some processing there