Google Cloud Speech + Web Audio API

Speech recognition and synthesis using the Google Cloud Speech APIs integrated with the Web Audio API for microphone input and playback directly in the browser.

For now authorization only works with an API Key, you can create one at https://console.cloud.google.com/apis/credentials. Make sure you restrict it to only Cloud Speech-to-Text and Cloud Text-to-Speech APIs.

Here's a demo page.

Usage

npm install google-cloud-speech-webaudio

Speech Recognition

import { GoogleSpeechRecognition } from 'google-cloud-speech-webaudio';

const GOOGLE_API_KEY = '...';

// Optionally define a regional endpoint: https://cloud.google.com/speech-to-text/docs/endpoints
const EU_ENDPOINT = 'https://eu-speech.googleapis.com'

// If this parameter is not defined, the US endpoint will be used by default.
// const US_ENDPOINT = 'https://us-speech.googleapis.com'

const speechRecognition = new GoogleSpeechRecognition(GOOGLE_API_KEY, EU_ENDPOINT);

// start recording microphone audio to a buffer.
// on first run it will request microphone permission.
await speechRecognition.startListening();

// stop recording your audio, send the buffer to Google for transcription
const result = await speechRecognition.stopListening();

Speech Synthesis

import { GoogleSpeechSynthesis } from 'google-cloud-speech-webaudio';

const GOOGLE_API_KEY = '...';

const speechSynthesis = new GoogleSpeechSynthesis(GOOGLE_API_KEY);

// make the API call and play the produced speech audio buffer
await speechSynthesis.speak('hello world');

Author

Andrei Gheorghe

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