title: warning in recorder prepare
body: <p>I have a audiorecording program on Android in C#, when I debugging program I have a warning on </p>
  
  <blockquote>
    <p>recorder.Prepare (); // Prepared state
    (open failed: ENOENT) </p>
  </blockquote>
  
  <p>a had read already many topics, but I don't understand because of what this warning. thank in advance</p>
  
  <pre><code>public class Recorder
  {
      MediaRecorder recorder = null;
  
      public bool IsRecording { get { return recorder != null; } }
  
      public void Start ()
      {
  
          var filePath = Player.filePath;
          if (File.Exists (filePath)) {
              File.Delete (filePath);
          }
          if (recorder == null) {
              recorder = new MediaRecorder (); // Initial state.
          } else {
              recorder.Reset ();
          }
          recorder.SetAudioSource (AudioSource.Mic); 
          recorder.SetOutputFormat (OutputFormat.ThreeGpp);
          recorder.SetAudioEncoder (AudioEncoder.AmrNb);
          // Initialized state.
          recorder.SetOutputFile (filePath); 
          // DataSourceConfigured state.
          recorder.Prepare (); // Prepared state
          recorder.Start (); // Recording state.
      }
      public void Stop ()
      {
          if (recorder != null){
              recorder.Stop ();
              recorder.Release ();
              recorder = null;
          }
      }
  }
  </code></pre>
  
  <p>} </p>