text: var recLength = 0,
      recBuffersL = [],
      recBuffersR = [],
      sampleRate;
  
  this.onmessage = function(e){
      switch(e.data.command){
          case 'init':
              init(e.data.config);
              break;
          case 'record':
              record(e.data.buffer);
              break;
          case 'exportWAV':
              exportWAV(e.data.type);
              break;
          case 'clear':
              clear();
              break;
      }
  };
  
  function init(config){
      sampleRate = config.sampleRate;
  }
  
  function record(inputBuffer){
      recBuffersL.push(inputBuffer[0]);
      recBuffersR.push(inputBuffer[1]);
      recLength += inputBuffer[0].length;
  }
  
  function exportWAV(type){
      var bufferL = mergeBuffers(recBuffersL, recLength);
      var bufferR = mergeBuffers(recBuffersR, recLength);
      var interleaved = interleave(bufferL, bufferR);
      var dataview = encodeWAV(interleaved);
      var audioBlob = new Blob([dataview], { type: type });
  
      this.postMessage(audioBlob);
  }
  
  function clear(){
      recLength = 0;
      recBuffersL = [];
      recBuffersR = [];
  }
  
  function mergeBuffers(recBuffers, recLength){
      var result = new Float32Array(recLength);
      var offset = 0;
      for (var i = 0; i < recBuffers.length; i++){
          result.set(recBuffers[i], offset);
          offset += recBuffers[i].length;
      }
      return result;
  }
  
  function interleave(inputL, inputR){
      var length = inputL.length + inputR.length;
      var result = new Float32Array(length);
  
      var index = 0,
          inputIndex = 0;
  
      while (index < length){
          result[index++] = inputL[inputIndex];
          result[index++] = inputR[inputIndex];
          inputIndex++;
      }
      return result;
  }
  
  function floatTo16BitPCM(output, offset, input){
      for (var i = 0; i < input.length; i++, offset+=2){
          var s = Math.max(-1, Math.min(1, input[i]));
          output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
      }
  }
  
  function writeString(view, offset, string){
      for (var i = 0; i < string.length; i++){
          view.setUint8(offset + i, string.charCodeAt(i));
      }
  }
  
  function encodeWAV(samples){
      var buffer = new ArrayBuffer(44 + samples.length * 2);
      var view = new DataView(buffer);
      console.log(sampleRate);
      /* RIFF identifier */
      writeString(view, 0, 'RIFF');
      /* file length */
      view.setUint32(4, 32 + samples.length * 2, true);
      /* RIFF type */
      writeString(view, 8, 'WAVE');
      /* format chunk identifier */
      writeString(view, 12, 'fmt ');
      /* format chunk length */
      view.setUint32(16, 16, true);
      /* sample format (raw) */
      view.setUint16(20, 1, true);
      /* channel count */
      view.setUint16(22, 2, true);
      /* sample rate */
      view.setUint32(24, sampleRate, true);
      /* byte rate (sample rate * block align) */
      view.setUint32(28, sampleRate * 4, true);
      /* block align (channel count * bytes per sample) */
      view.setUint16(32, 4, true);
      /* bits per sample */
      view.setUint16(34, 16, true);
      /* data chunk identifier */
      writeString(view, 36, 'data');
      /* data chunk length */
      view.setUint32(40, samples.length * 2, true);
  
      floatTo16BitPCM(view, 44, samples);
  
      return view;
  }