call_tts.js

require('dotenv').config();
const _ = require('lodash');
const fs = require('fs');
const textToSpeech = require('@google-cloud/text-to-speech');
const client = new textToSpeech.TextToSpeechClient();

const request = {
    // The text to synthesize
    input: {
        text: 'This is an example'
    },

    // The language code and SSML Voice Gender
    voice: {
        languageCode: 'en-US',
        ssmlGender: 'NEUTRAL'
    },

    // The audio encoding type
    audioConfig: {
        audioEncoding: 'MP3'
    },
};

const outputFileName = 'output.mp3';

client.synthesizeSpeech(request)
    .then(async (response) => {
        console.log(response);
        const audioContent = _.get(response[0], 'audioContent');

        if (audioContent) {
            fs.writeFileSync(outputFileName, audioContent, 'binary');
            console.log(`Audio content successfully written to file: ${outputFileName}`);
        } else {
            console.log('Failed to get audio content');
        }
    })
    .catch((err) => {
        console.error('ERROR:', err);
    });