     TAKERU: 'takeru'
     SANTA: 'santa'
     BEAR: 'bear'
+  FORMAT:
+    OGG: 'ogg'
+    WAV: 'wav'
+    AAC: 'aac'
 
   constructor: (@api_key)->
     @_pitch = 100

    @_speaker = @SPEAKER.SHOW
    @_emotion = undefined
    @_emotion_level = undefined
    @

  speaker: (speaker)->

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

  speak: (text, callback)->
