message: making channel mode explicit
  fixes splitting problem in FF
diff: @@ -21,6 +21,8 @@ define(["Tone/core/Tone", "Tone/core/Gain"], function(Tone){
  * @private
  */
  this._splitter = this.input = this.context.createChannelSplitter(2);
  + this._splitter.channelCount = 2;
  + this._splitter.channelCountMode = "explicit";
  /**
  * Left channel output.
  