listVoices.js

// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

'use strict';

async function listVoices() {
  // [START tts_list_voices]
  const textToSpeech = require('@google-cloud/text-to-speech');

  const client = new textToSpeech.TextToSpeechClient();

  const [result] = await client.listVoices({});
  const voices = result.voices;

  console.log('Voices:');
  voices.forEach(voice => {
    console.log(`Name: ${voice.name}`);
    console.log(`  SSML Voice Gender: ${voice.ssmlGender}`);
    console.log(`  Natural Sample Rate Hertz: ${voice.naturalSampleRateHertz}`);
    console.log('  Supported languages:');
    voice.languageCodes.forEach(languageCode => {
      console.log(`    ${languageCode}`);
    });
  });
  // [END tts_list_voices]
}

async function main() {
require(`yargs`) // eslint-disable-line
    .demand(1)
    .command('list-voices', 'List supported voices.', {}, () => listVoices())
    .example('node $0 list-voices')
    .wrap(120)
    .recommendCommands()
    .epilogue(
      'For more information, see https://cloud.google.com/text-to-speech/docs'
    )
    .help()
    .strict().argv;
}

main().catch(console.error);