     @_speaker = @SPEAKER.SHOW
     @_emotion = undefined
     @_emotion_level = undefined
+    @_format = @FORMAT.WAV
     @
 
   speaker: (speaker)->

      @_volume = lvl
    @

  build_params: (text)->
    params =
      volume: @_volume

      emotion_level: @_emotion_level
      emotion: @_emotion
      speaker: @_speaker
      format: @_format
      text: text

  speak: (text, callback)->
