Program: 76062
Project: 76062
Buggy source:
/** 
 * If there are at least <i>count</i> tokens on the input port, invoke <i>count</i> iterations of this actor. Otherwise, do nothing, and return a value of COMPLETED. One token is read from each channel in an iteration.  The audio output is either a sound file and/or the speaker, depending on the current  mode, which is controlled by the value of the <i>pathName</i>  parameter.
 * @return COMPLETED if the actor was successfully iterated thespecified number of times. Otherwise, throw an exception.
 * @exception IllegalActionException If the <i>count</i> samplescannot be written to the audio output device.
 */
public int iterate(int count) throws IllegalActionException {
  if (_debugging)   _debug("String_Node_Str" + count);
  for (int j=0; j < _channels; j++) {
    if (input.hasToken(j,count)) {
      _inArray[j]=input.get(j,count);
    }
 else {
      return COMPLETED;
    }
  }
  for (int k=0; k < count; k++) {
    for (int m=0; m < _channels; m++) {
      _audioPutArray[m][_curElement]=((DoubleToken)_inArray[m][k]).doubleValue();
    }
    _curElement++;
    if (_curElement == _putSampleSize) {
      try {
        _soundPlayback.putSamples(_audioPutArray);
      }
 catch (      Exception ex) {
        throw new IllegalActionException("String_Node_Str" + ex.getMessage());
      }
      _curElement=0;
    }
  }
  return COMPLETED;
}

Fixed version (ground truth):
/** 
 * If there are at least <i>count</i> tokens on the input port, invoke <i>count</i> iterations of this actor. Otherwise, do nothing, and return a value of NOT_READY. One token is read from each channel in an iteration.  The audio output is either a sound file and/or the speaker, depending on the current  mode, which is controlled by the value of the <i>pathName</i>  parameter. <p> This method should be called instead of the prefire(),  fire(), and postfire() methods when this actor is used in a domain that supports vectorized actors. It is recommended for performance reasons that a large value of <i>count</i> be used  when this actor is used in live playback mode. This actor is  optimized to provide good performance even if the value of  <i>count</i> changes often.
 * @param count The number of iterations to perform.
 * @return COMPLETED if the actor was successfully iterated thespecified number of times. Otherwise, return NOT_READY if there are not enough tokens on the input port, or throw an exception if there is a problem writing audio samples to the audio sink.
 * @exception IllegalActionException If the <i>count</i> samplescannot be written to the audio output device.
 */
public int iterate(int count) throws IllegalActionException {
  if (_debugging)   _debug("String_Node_Str" + count);
  for (int j=0; j < _channels; j++) {
    if (input.hasToken(j,count)) {
      _inArray[j]=input.get(j,count);
    }
 else {
      return NOT_READY;
    }
  }
  for (int k=0; k < count; k++) {
    for (int m=0; m < _channels; m++) {
      _audioPutArray[m][_curElement]=((DoubleToken)_inArray[m][k]).doubleValue();
    }
    _curElement++;
    if (_curElement == _putSampleSize) {
      try {
        _soundPlayback.putSamples(_audioPutArray);
      }
 catch (      Exception ex) {
        throw new IllegalActionException("String_Node_Str" + ex.getMessage());
      }
      _curElement=0;
    }
  }
  return COMPLETED;
}