Send Voice Notes over Telegram in Java - Complete Guide

Automate Telegram voice note sharing using the WhatsMate Telegram Gateway REST API

Posted on June 22, 2022   Share on Facebook Share on LinkedIn Share on Twitter Share on Google+

Last reviewed: February 4, 2026  

Automate Telegram Voice Note Sharing with Java

Looking to automate voice message delivery, audio recordings, or spoken notifications from your Java applications? This guide walks you through sending voice note files (OPUS format) to Telegram users using Java and the WhatsMate Telegram Gateway REST API. Perfect for Java developers, system administrators, and automation enthusiasts who want to integrate voice messaging into their Java-based workflows.

📋 Prerequisites

Before you begin, ensure you have:

  1. A WhatsMate Telegram Gateway account - Required for API access
  2. Recipient registration - Each recipient must register with the Gateway first
  3. Java development environment - JDK installed and configured
  4. Basic Java knowledge - Familiarity with Java programming
  5. Voice note file ready - Have the OPUS file you want to send available locally
  6. Required libraries - Gson and Commons Codec (details in code comments)

⚠️ Important: Recipients must register with the WhatsMate Telegram Gateway before they can receive messages. Unregistered users will not receive any messages from the Gateway. Registration instructions are available on the official WhatsMate site.

📝 Step-by-Step Implementation

Follow these steps to send your first voice note to a Telegram user from a Java application:

1. Copy the Java Code Template

Start by copying the following source code into your Java file:

2. Configure a few Parameters

Customize these key parameters in the Java code:

  • Lines 50-52: Replace YOUR_INSTANCE_ID_HERE, YOUR_CLIENT_ID_HERE, and YOUR_CLIENT_SECRET_HERE with your gateway instance ID, Client ID, and Secret
  • Line 61: Replace 1234556899 with the target phone number (including the country code)
  • Line 63: Replace ../assets/martin-luther-king.opus with the path to your OPUS voice note file
  • Line 65: Replace anyname.opus with the desired filename for the voice note
  • Line 66: Replace I have a dream with an optional caption for your voice note

3. Compile the Java Program

Compile the Java source code (follow instructions at top of source file):

javac -cp "jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramOpusSender.java

4. Send Your Voice Note

Run the compiled Java program to deliver your voice note to Telegram:

java -cp ".:jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramOpusSender

🔧 Common Use Cases

This automation approach is ideal for:

  • AI/TTS integration - Generate voice messages using text-to-speech (TTS) APIs and deliver them to Telegram for automated announcements, notifications, or interactive voice responses
  • System monitoring alerts - Send voice alerts for server status or monitoring events from Java applications
  • Customer service automation - Send voice responses or information to clients via Telegram
  • Audio notifications - Deliver spoken alerts or voice notifications from Java systems
  • Voice message automation - Send pre-recorded voice messages or announcements via Telegram from Java applications

🚀 Get Started Today

Ready to automate your voice note sharing over Telegram with Java? You’ll need a trial account to access the API. Sign up for a 2-week trial and start sending voice notes within minutes!

Next Steps: Once you’ve mastered basic voice note sending, explore advanced features like sending audio files, images, or documents through the WhatsMate Telegram Gateway API documentation.