@type t() :: %Nvidia.Riva.Tts.SynthesizeSpeechRequest{
  __unknown_fields__: [
    {field_number :: integer(), Protobuf.Wire.Types.wire_type(),
     value :: term()}
  ],
  encoding: Nvidia.Riva.AudioEncoding.t(),
  id: Nvidia.Riva.RequestId.t() | nil,
  language_code: String.t(),
  sample_rate_hz: integer(),
  text: String.t(),
  voice_name: String.t(),
  zero_shot_data: Nvidia.Riva.Tts.ZeroShotData.t() | nil
}