ChannelSplitterNode createChannelSplitter([int numberOfOutputs ])

Source 

ChannelSplitterNode createChannelSplitter([int numberOfOutputs]) {
  if (numberOfOutputs != null) {
    return _blink.BlinkAudioContext.instance
        .createChannelSplitter_Callback_1_(this, numberOfOutputs);
  }
  return _blink.BlinkAudioContext.instance
      .createChannelSplitter_Callback_0_(this);
}