Google Speech-to-Text Transcriber

A plugin for IVR Tester to transcribe IVR call flows using Google Speech-to-Text.

Installation

Install using yarn:

yarn add ivr-tester-transcriber-google-speech-to-text

Or npm:

npm install ivr-tester-transcriber-google-speech-to-text

Configuration

Setup GCP project and credentials

Follow GCP's quick-start guide to:

1. Setup a Google Cloud project
2. Enable the Google Speech-to-Text service
3. Create a service account
4. Create then download a JSON key-file for the service account
5. Set the GOOGLE_APPLICATION_CREDENTIALS environment variable to the path of the JSON key-file

export GOOGLE_APPLICATION_CREDENTIALS=/path/to/key.json

Usage

See the API's documentation for details of each parameter.

import { googleSpeechToText } from "ivr-tester-transcriber-google-speech-to-text";

const config: Config = {
  transcriber: googleSpeechToText({ languageCode: "en-GB" })
};

Speech Adaptation

The plugin exposes two properties that allow you to improve the accuracy of transcriptions:

• useEnhanced - Whether to use an enhanced model for speech recognition if it is available for the language code provided. Beware this costs more!
• speechPhrases - Allows you to specify specific words or phrases used more frequently within the speech. See Google's guide for more info on what to provide.

import { googleSpeechToText } from "ivr-tester-transcriber-google-speech-to-text";

const config: Config = {
  transcriber: googleSpeechToText(
    {
      languageCode: "en-GB",
      useEnhanced: true,
      speechPhrases: ["balance", "costing", "financial services"]
    }
  ),
};

Debugging

Console logging can be enabled by specifying the package name in the DEBUG environment variable:

DEBUG=ivr-tester-transcriber-google-speech-to-text
DEBUG_DEPTH=5