#Riffr Riffr is a nodejs util to create RIFF formatted files.

The example below will generate a WAV file:

const fs = require('fs');
const riffr = require('./riff');

const wavFile = new riffr.RIFF('WAVE');

const formatChunk = new riffr.RIFFChunk('fmt ');
formatChunk.writeBytes([1, 0]); //Type of Format
formatChunk.writeBytes([1, 0]); //Number of Channels
formatChunk.writeBytes([68, 172, 0, 0]); //Sample Rate
formatChunk.writeBytes([68, 172, 0, 0]); //AvgBytesPerSec
formatChunk.writeBytes([1, 0]); //BlockAlign
formatChunk.writeBytes([8, 0]); //Bits per Sample

wavFile.addChunk(formatChunk);

const dataChunk = new riffr.RIFFChunk('data');
for(var i = 0; i < 44100; i++){
  const val = (Math.sin(i/32) * 255) + 256;
  dataChunk.writeByte(val);
}

wavFile.addChunk(dataChunk);

const buffer = wavFile.toBuffer();

fs.writeFile('test.wav', buffer, function(err){
  if(err) {
    return console.log(err);
  }
  console.log("Saved test.wav");
});