docs: function Note(pitch_class) {
  		var accidental = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Accidental.None;
  		var octave = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 4;
  
  		this._pitch_class = pitch_class;
  		this._accidental = accidental;
  		this._octave = octave;
  	}