How to Send Voice-to-SMS Transcripts Using Twilio Voice and Programmable SMS

Twilio’s Voice API allows developers to send voice-to-SMS transcripts using TwiML, which processes incoming calls accordingly. The tutorial covers setting up a new Node.js application, installing dependencies, and creating routes for handling incoming requests. It also explains how to use Twilio's Node Helper Library to interact with the API, dotenv to store environment variables, and Express to route and handle incoming requests. The app uses TwiML to transcribe voice messages left by users and sends a callback with the transcription to the /sms endpoint, which then sends the transcription as an SMS to the developer's personal phone number. To test the app, developers need to configure a webhook using ngrok to forward requests from their Twilio number to the local server. Once the app is set up, it can be tested by calling the Twilio number and leaving a message, which should result in receiving an SMS with the transcribed message.