# Cloud Text-to-Speech API . text

## Instance Methods

Synthesizes speech synchronously: receive results after all text input

### Method Details

`synthesize(body=None, x__xgafv=None)`

    Synthesizes speech synchronously: receive results after all text input
    has been processed.

    Args:
      body: object, The request body.
        The object takes the form of:

    { # The top-level message sent by the client for the `SynthesizeSpeech` method.
        "input": { # Contains text input to be synthesized. Either `text` or `ssml` must be # Required. The Synthesizer requires either plain text or SSML as input.
            # supplied. Supplying both or neither returns
            # google.rpc.Code.INVALID_ARGUMENT. The input size is limited to 5000
            # characters.
          "ssml": "A String", # The SSML document to be synthesized. The SSML document must be valid
              # and well-formed. Otherwise the RPC will fail and return
              # google.rpc.Code.INVALID_ARGUMENT. For more information, see
              # [SSML](/speech/text-to-speech/docs/ssml).
          "text": "A String", # The raw text to be synthesized.
        },
        "voice": { # Description of which voice to use for a synthesis request. # Required. The desired voice of the synthesized audio.
          "name": "A String", # The name of the voice. If not set, the service will choose a
              # voice based on the other parameters such as language_code and gender.
          "ssmlGender": "A String", # The preferred gender of the voice. If not set, the service will
              # choose a voice based on the other parameters such as language_code and
              # name. Note that this is only a preference, not requirement; if a
              # voice of the appropriate gender is not available, the synthesizer should
              # substitute a voice with a different gender rather than failing the request.
          "languageCode": "A String", # Required. The language (and potentially also the region) of the voice expressed as a
              # [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag, e.g.
              # "en-US". This should not include a script tag (e.g. use
              # "cmn-cn" rather than "cmn-Hant-cn"), because the script will be inferred
              # from the input provided in the SynthesisInput.  The TTS service
              # will use this parameter to help choose an appropriate voice.  Note that
              # the TTS service may choose a voice with a slightly different language code
              # than the one selected; it may substitute a different region
              # (e.g. using en-US rather than en-CA if there isn't a Canadian voice
              # available), or even a different language, e.g. using "nb" (Norwegian
              # Bokmal) instead of "no" (Norwegian)".
        },
        "audioConfig": { # Description of audio data to be synthesized. # Required. The configuration of the synthesized audio.
          "sampleRateHertz": 42, # Optional. The synthesis sample rate (in hertz) for this audio. When this is
              # specified in SynthesizeSpeechRequest, if this is different from the voice's
              # natural sample rate, then the synthesizer will honor this request by
              # converting to the desired sample rate (which might result in worse audio
              # quality), unless the specified sample rate is not supported for the
              # encoding chosen, in which case it will fail the request and return
              # google.rpc.Code.INVALID_ARGUMENT.
          "pitch": 3.14, # Optional. Input only. Speaking pitch, in the range [-20.0, 20.0]. 20 means
              # increase 20 semitones from the original pitch. -20 means decrease 20
              # semitones from the original pitch.
          "speakingRate": 3.14, # Optional. Input only. Speaking rate/speed, in the range [0.25, 4.0]. 1.0 is
              # the normal native speed supported by the specific voice. 2.0 is twice as
              # fast, and 0.5 is half as fast. If unset(0.0), defaults to the native 1.0
              # speed. Any other values < 0.25 or > 4.0 will return an error.
          "audioEncoding": "A String", # Required. The format of the audio byte stream.
          "effectsProfileId": [ # Optional. Input only. An identifier which selects 'audio effects' profiles
              # that are applied on (post synthesized) text to speech. Effects are applied
              # on top of each other in the order they are given. See
              # [audio
              # profiles](https://cloud.google.com/text-to-speech/docs/audio-profiles) for
              # current supported profile ids.
            "A String",
          ],
          "volumeGainDb": 3.14, # Optional. Input only. Volume gain (in dB) of the normal native volume
              # supported by the specific voice, in the range [-96.0, 16.0]. If unset, or
              # set to a value of 0.0 (dB), will play at normal native signal amplitude. A
              # value of -6.0 (dB) will play at approximately half the amplitude of the
              # normal native signal amplitude. A value of +6.0 (dB) will play at
              # approximately twice the amplitude of the normal native signal amplitude.
              # Strongly recommend not to exceed +10 (dB) as there's usually no effective
              # increase in loudness for any value greater than that.
        },
      }

      x__xgafv: string, V1 error format.
        Allowed values
          1 - v1 error format
          2 - v2 error format

    Returns:
      An object of the form:

        { # The message returned to the client by the `SynthesizeSpeech` method.
        "audioContent": "A String", # The audio data bytes encoded as specified in the request, including the
            # header for encodings that are wrapped in containers (e.g. MP3, OGG_OPUS).
            # For LINEAR16 audio, we include the WAV header. Note: as
            # with all bytes fields, protobuffers use a pure binary representation,
            # whereas JSON representations use base64.
      }