SYN6988 Speech Synthesis TTS Module – UART/SPI Text-to-Speech

The SYN6988 Speech Synthesis Module is a high-performance Text-to-Speech (TTS) solution designed to give your projects a clear, natural-sounding voice. Unlike basic buzzer-based alerts, this module synthesizes written text into high-quality human-like speech, supporting both English and Chinese synthesis with smooth, rounded tones. Whether you are building an interactive robot or an automated announcement system, the SYN6988 provides a professional audio experience.

Versatile Communication & Large Buffer

This module is exceptionally developer-friendly, offering both UART and SPI communication modes. It features a massive synthesis buffer, capable of processing up to 4,000 bytes of text in a single command. This allows for the reading of long paragraphs or complex data strings without the need for constant segmenting by the host microcontroller.

Efficiency for Embedded Systems

Designed for low-power applications, the SYN6988 supports a dedicated standby mode triggered via software commands, making it ideal for battery-operated IoT devices. The module comes as a complete kit, including a USB-to-TTL converter, allowing you to test speech strings directly from your computer before integrating them into your Arduino, ESP32, or Raspberry Pi project.

Key Features

• Natural Voice Quality: High-fidelity synthesis that sounds significantly more human than previous generations.

• Dual Interface: Supports high-speed SPI and standard UART (up to 115200bps).

• Massive Text Buffer: Handles up to 4KB of data per synthesis request.

• Power Management: Built-in standby mode for energy-efficient operation.

• Compact Form Factor: Small patch-style package for easy integration into custom PCBs.

• Interactive Potential: Best used alongside speech recognition modules for full two-way human-machine interaction.

Technical Specifications

Typical Application Scenarios

• Robotics: Giving your 8DOF biped or humanoid robot the ability to speak status updates.

• Public Address Systems: Automated voice broadcasting for stations or waiting rooms.

• Assistive Tech: Building devices that read text aloud for the visually impaired.

• Industrial Alarms: Replacing simple “beeps” with specific voice warnings (e.g., “High Temperature Detected”).

• Smart Home: Voice prompts for security systems or smart appliances.

Resources

MicroPython Library- Click here

For tutorial and code- Click here

Package Includes

• 1 x SYN6988 Speech Synthesis TTS Voice Module

• 1 x USB to TTL Converter Board

• 4 x Female-to-Female Jumper Wires

Important Product Disclaimer

Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. Product images are shown for illustrative purposes only and may differ from the actual product.

Note

Audio Output: This module outputs a line-level signal. For driving a speaker directly, you will need a small audio amplifier module (like the PAM8403). Ensure your text encoding matches the module’s requirements (typically GBK or Unicode) for correct pronunciation.