Send Voice Note Files to Telegram Groups in Java - Complete Guide

Automate Telegram Group Voice Note Sharing with Java

Looking to deliver voice notes, audio recordings, or spoken messages to Telegram groups directly from your Java applications? This comprehensive guide walks you through sending voice note files (OPUS format) to Telegram groups using Java and the WhatsMate Telegram Gateway REST API. Perfect for Java developers building community engagement tools, team collaboration platforms, or customer communication systems that need reliable group voice messaging capabilities.

📋 Prerequisites

Before you begin, ensure you have:

1. A WhatsMate Telegram Gateway account - Required for API access (sign up for a 2-week trial)
2. Group registration - The Telegram group must be registered with the Gateway first
3. Java development environment - JDK 8+ installed and configured on your system
4. Basic Java knowledge - Familiarity with Java programming concepts and build tools
5. Voice note file ready - Have the OPUS file you want to send available locally
6. Required libraries - Gson (2.8.0+) and Commons Codec (1.10+) for JSON processing and Base64 encoding

⚠️ Important: Telegram groups must be registered with the WhatsMate Telegram Gateway before they can receive messages. Unregistered groups 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 file to a Telegram group 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 51-53: Replace YOUR_INSTANCE_ID_HERE, YOUR_CLIENT_ID_HERE, and YOUR_CLIENT_SECRET_HERE with your Telegram gateway credentials
• Line 61: Replace Muscle Men Club with your target Telegram group name
• Line 62: Replace 19159876123 with the phone number of the group admin (including country code)
• Line 64: Replace ../assets/martin-luther-king.opus with the path to your OPUS voice note file
• Line 66: Replace anyname.opus with the desired filename for the voice note
• Line 67: Replace I have a dream with an optional caption for your voice note

3. Set Up Dependencies

Add the required libraries to your project:

If using Maven, add these dependencies to your pom.xml:

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.0</version>
</dependency>
<dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
    <version>1.10</version>
</dependency>

If using Gradle, add to your build.gradle:

dependencies {
    implementation 'com.google.code.gson:gson:2.8.0'
    implementation 'commons-codec:commons-codec:1.10'
}

4. Compile and Run

Compile and execute your Java program:

If using Maven (after adding dependencies to pom.xml):

mvn compile
mvn exec:java -Dexec.mainClass="TelegramGroupOpusSender"

If using Gradle:

./gradlew compileJava
./gradlew run --args=""

If not using a build tool:

# Compile with required JAR files
javac -cp "jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramGroupOpusSender.java

# Run the compiled program
java -cp ".:jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramGroupOpusSender

🔧 Common Use Cases

This automation approach is ideal for Java developers building:

• AI/TTS integration - Generate voice messages using text-to-speech (TTS) APIs and deliver them to Telegram groups for automated announcements, notifications, or interactive voice responses
• Engagement platforms - Send voice announcements or updates to Telegram groups from Java backend services
• Team collaboration tools - Deliver voice notifications, meeting summaries, or audio alerts to team collaboration groups in enterprise Java applications
• Customer communication systems - Share voice messages, support responses, or audio updates with customer groups through Java-based CRM systems
• Educational platforms - Distribute voice lectures, language lessons, or spoken feedback to student groups from Java learning management systems

🚀 Get Started Today

Ready to automate your group 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 note files to groups from your Java applications within minutes!

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