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

      @_volume = lvl
    @

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

    TAKERU: 'takeru'
    SANTA: 'santa'
    BEAR: 'bear'
  FORMAT:
    OGG: 'ogg'
    WAV: 'wav'
    AAC: 'aac'

  constructor: (@api_key)->
    @_pitch = 100
