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Audiofork Integration with Google Cloud Speech-to-Text

Project Overview

This project demonstrates a basic integration of the Audiofork module with Google Cloud Speech-to-Text services. Audiofork is an open-source module within the Asterisk framework for audio manipulation, while Google Cloud Speech-to-Text provides cloud-based speech recognition capabilities. By combining these technologies, developers can create applications that transcribe audio from telephony systems or other sources in real-time using Google's powerful speech recognition capabilities.

Demo Application

The demo application in this project is built using Node.js. It utilizes the Audiofork module to capture audio from a telephony source (e.g., SIP call) within an Asterisk environment. This audio is then streamed to Google Cloud Speech-to-Text service for transcription. Once transcribed, the text output is logged or displayed for further processing.

Getting Started

To use this demo application, follow these steps:

  1. Prerequisites:

    • Node.js installed on your machine.
    • Access to an Asterisk server with Audiofork module installed and configured.
    • A Google Cloud Platform (GCP) account with Speech-to-Text API enabled.

  2. Clone the Repository:

    git clone <repository_url>

  3. Install Dependencies:

    cd <project_directory>
npm install

  4. Set up Google Cloud Credentials:

    • Generate a service account key for your GCP project. Instructions can be found here.
    • Create a .env file in the root directory of the project and add the following line, replacing /path/to/your/service-account-key.json with the path to your service account key file: 
      GOOGLE_APPLICATION_CREDENTIALS=/path/to/your/service-account-key.json

  5. Run the Application:

    node app.js

  6. Test the Application:

    • Initiate a call to your Asterisk server or simulate audio input through another source.
    • Check the console output for transcription results from Google Cloud Speech-to-Text.

Additional Notes

  • Ensure proper network connectivity and firewall settings to allow communication between the Asterisk server and Google Cloud Speech-to-Text service.
  • This demo application provides a basic integration example. Developers can extend it further to incorporate additional features or enhance error handling as per their requirements.