SynthesizeSpeechRequest

Specifies the engine (standard, neural, long-form, or generative) for Amazon Polly to use when processing input text for speech synthesis. Provide an engine that is supported by the voice you select. If you don't provide an engine, the standard engine is selected by default. If a chosen voice isn't supported by the standard engine, this will result in an error. For information on Amazon Polly voices and which voices are available for each engine, see Available Voices.

Optional language code for the Synthesize Speech request. This is only necessary if using a bilingual voice, such as Aditi, which can be used for either Indian English (en-IN) or Hindi (hi-IN).

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.

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.

The audio frequency specified in Hz.

The type of speech marks returned for the input text.

Input text to synthesize. If you specify ssml as the TextType, follow the SSML format for the input text.

Specifies whether the input text is plain text or SSML. The default value is plain text. For more information, see Using SSML.

Voice ID to use for the synthesis. You can get a list of available voice IDs by calling the DescribeVoices operation.