This tutorial demonstrates how to implement live transcription of phone calls using Twilio and Vosk, a lightweight open-source speech recognition engine. The application uses Python and the Flask web framework to create a WebSocket server that streams audio from incoming phone calls to the Vosk engine for transcription. The TwiML response is generated by the Flask application to instruct Twilio on how to handle the incoming call, including streaming the audio to the server for transcription. The speech recognition results are then printed to the terminal in real-time, providing a live transcription of the conversation. The tutorial also provides guidance on setting up the project, configuring the Twilio credentials, and running the application.