def synthesize_speech(LexiconNames=None, OutputFormat=None, SampleRate=None,
    SpeechMarkTypes=None, Text=None, TextType=None, VoiceId=None):
    """
    Synthesizes UTF-8 input, plain text or SSML, to a stream of bytes. SSML input must be valid, well-formed SSML. Some alphabets might not be available with all the voices (for example, Cyrillic might not be read at all by English voices) unless phoneme mapping is used. For more information, see How it Works .
    See also: AWS API Documentation
    
    Examples
    Synthesizes plain text or SSML into a file of human-like speech.
    Expected Output:
    
    :example: response = client.synthesize_speech(
        LexiconNames=[
            'string',
        ],
        OutputFormat='json'|'mp3'|'ogg_vorbis'|'pcm',
        SampleRate='string',
        SpeechMarkTypes=[
            'sentence'|'ssml'|'viseme'|'word',
        ],
        Text='string',
        TextType='ssml'|'text',
        VoiceId='Geraint'|'Gwyneth'|'Mads'|'Naja'|'Hans'|'Marlene'|'Nicole'|'Russell'|'Amy'|'Brian'|'Emma'|'Raveena'|'Ivy'|'Joanna'|'Joey'|'Justin'|'Kendra'|'Kimberly'|'Salli'|'Conchita'|'Enrique'|'Miguel'|'Penelope'|'Chantal'|'Celine'|'Mathieu'|'Dora'|'Karl'|'Carla'|'Giorgio'|'Mizuki'|'Liv'|'Lotte'|'Ruben'|'Ewa'|'Jacek'|'Jan'|'Maja'|'Ricardo'|'Vitoria'|'Cristiano'|'Ines'|'Carmen'|'Maxim'|'Tatyana'|'Astrid'|'Filiz'|'Vicki'
    )
    
    
    :type LexiconNames: list
    :param LexiconNames: List of one or more pronunciation lexicon names you want the service to apply during synthesis. Lexicons are applied only if the language of the lexicon is the same as the language of the voice. For information about storing lexicons, see PutLexicon .
            (string) --
            

    :type OutputFormat: string
    :param OutputFormat: [REQUIRED]
            The format in which the returned output will be encoded. For audio stream, this will be mp3, ogg_vorbis, or pcm. For speech marks, this will be json.
            

    :type SampleRate: string
    :param SampleRate: The audio frequency specified in Hz.
            The valid values for mp3 and ogg_vorbis are '8000', '16000', and '22050'. The default value is '22050'.
            Valid values for pcm are '8000' and '16000' The default value is '16000'.
            

    :type SpeechMarkTypes: list
    :param SpeechMarkTypes: The type of speech marks returned for the input text.
            (string) --
            

    :type Text: string
    :param Text: [REQUIRED]
            Input text to synthesize. If you specify ssml as the TextType , follow the SSML format for the input text.
            

    :type TextType: string
    :param TextType: Specifies whether the input text is plain text or SSML. The default value is plain text. For more information, see Using SSML .

    :type VoiceId: string
    :param VoiceId: [REQUIRED]
            Voice ID to use for the synthesis. You can get a list of available voice IDs by calling the DescribeVoices operation.
            

    :rtype: dict
    :return: {
        'AudioStream': StreamingBody(),
        'ContentType': 'string',
        'RequestCharacters': 123
    }
    
    
    :returns: 
    If you request mp3 as the OutputFormat , the ContentType returned is audio/mpeg.
    If you request ogg_vorbis as the OutputFormat , the ContentType returned is audio/ogg.
    If you request pcm as the OutputFormat , the ContentType returned is audio/pcm in a signed 16-bit, 1 channel (mono), little-endian format.
    If you request json as the OutputFormat , the ContentType returned is audio/json.
    
    """
    pass
