Skip to main content

Using Fonoster with Google speech APIs

This quick guide will walk you thorugh what is needed to enable Google Speech in Fonoster, and unlock the potential of using Text-to-Speech (TTS) and Automatic Speech Recognition (ASR) in your Voice Applications.

Obtaining a Service Account Key​

To use Google Speech in Fonoster you will need a Service Account Key.

To obtain the key please perform the following steps.

  1. Open GCP console https://console.cloud.google.com/
  2. Select or create a new project

    Assign a name and organization, you can leave those to be the default values

  3. Search for "Cloud Speech-to-Text API" and enable it

    Check the documentation for the Cloud Speech-to-Text API

  4. Search for "Service accounts" and create a new service account
  5. Add a key to the service account
  6. Choose JSON format
  7. Download and save in a safe location

Using the Speech APIs in a Voice Application​

To use the speech APIs you first need to install the NPM plugins with:

npm install @fonoster/googleasr @fonoster/googletts

Then, configure the Voice Server to use the plugins we just installed. For example:

const { VoiceServer } = require("@fonoster/voice");
const GoogleTTS = require("@fonoster/googletts");
const GoogleASR = require("@fonoster/googleasr");
const voiceServer = new VoiceServer();
const speechConfig = { keyFilename: "./google.json" };

// Set the server to use the speech APIS
voiceServer.use(new GoogleTTS(speechConfig));
voiceServer.use(new GoogleASR(speechConfig));

voiceServer.listen(async(req, res) => {
  console.log(req);
  await res.answer();
  // To use this verb you MUST have a TTS plugin
  const speech = await res.gather();

  await res.say("You said " + speech);
  await res.hangup();
});

That's all. Now you can use Google Speech APIs in your Fonoster applications.