Use audio to change the emission of an object.

I have a robot which has a holographic orb. I want to orbs emission value to rise with the audio but I'm not sure how. I found this script which can scale the orb to the audio but I'm unsure how to change it to suit my needs. I'm VERY new to Unity by the way.

Thanks in advance!

 var qSamples: int = 1024;  // array size
  var refValue: float = 0.1; // RMS value for 0 dB
  var rmsValue: float;   // sound level - RMS
  var dbValue: float;    // sound level - dB
  var volume: float = 2; // set how much the scale will vary
  
  private var samples: float[]; // audio samples
  
  function Start () {
      samples = new float[qSamples];
  }
  
  function GetVolume(){
      GetComponent.<AudioSource>().GetOutputData(samples, 0); // fill array with samples
      var i: int;
      var sum: float = 0;
      for (i= 0; i < qSamples; i++){
          sum += samples[i]*samples[i]; // sum squared samples
      }
      rmsValue = Mathf.Sqrt(sum/qSamples); // rms = square root of average
      dbValue = 20*Mathf.Log10(rmsValue/refValue); // calculate dB
      if (dbValue < -160) dbValue = -160; // clamp it to -160dB min
  }
  
  function Update () {
      GetVolume();
      transform.localScale.y = volume * rmsValue;
  }