Cloud Text-to-Speech API C++ Client Library

An idiomatic C++ client library for the Cloud Text-to-Speech API, a service to synthesize natural-sounding speech by applying powerful neural network models.

While this library is GA, please note Google Cloud C++ client libraries do not follow Semantic Versioning.


The following shows the code that you'll run in the google/cloud/texttospeech/quickstart/ directory, which should give you a taste of the Cloud Text-to-Speech API C++ client library API.

#include "google/cloud/texttospeech/v1/text_to_speech_client.h"
#include <iostream>

auto constexpr kText = R"""(
Four score and seven years ago our fathers brought forth on this
continent, a new nation, conceived in Liberty, and dedicated to
the proposition that all men are created equal.)""";

int main(int argc, char* argv[]) try {
  if (argc != 1) {
    std::cerr << "Usage: " << argv[0] << "\n";
    return 1;

  namespace texttospeech = ::google::cloud::texttospeech_v1;
  auto client = texttospeech::TextToSpeechClient(

  google::cloud::texttospeech::v1::SynthesisInput input;
  google::cloud::texttospeech::v1::VoiceSelectionParams voice;
  google::cloud::texttospeech::v1::AudioConfig audio;

  auto response = client.SynthesizeSpeech(input, voice, audio);
  if (!response) throw std::move(response).status();
  // Normally one would play the results (response->audio_content()) over some
  // audio device. For this quickstart, we just print some information.
  auto constexpr kWavHeaderSize = 48;
  auto constexpr kBytesPerSample = 2;  // we asked for LINEAR16
  auto const sample_count =
      (response->audio_content().size() - kWavHeaderSize) / kBytesPerSample;
  std::cout << "The audio has " << sample_count << " samples\n";

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;

Main classes

The main class in this library is texttospeech_v1::TextToSpeechClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock texttospeech_v1::TextToSpeechClient when testing your application.

More Information