title: Decide cluster size for speaker adaptation in Sphinx-4
body: <p>In CMU Sphinx(Sphinx-4) for speaker adaptation technique, I am using following code snippet</p>
  
  <pre><code>Stats stats = recognizer.createStats(nrOfClusters);
  recognizer.startRecognition(stream);
  while ((result = recognizer.getResult()) != null) {
      stats.collect(result);
  }
  recognizer.stopRecognition();
  
  // Transform represents the speech profile
  Transform transform = stats.createTransform();
  recognizer.setTransform(transform);
  </code></pre>
  
  <p>what should be nrOfClusters(number of clusters) parameter value to get good results? How can we use this snippet to adapt to multiple speakers in audio?</p>