Text-to-Speech (TTS)

TTS (Text To Speech) synthesizes natural spoken audio from text. AI algorithms simulate human pronunciation and play the content in real time. TTS is a foundation for intelligent assistants, human-machine interaction, customer service, in-vehicle systems, and robot voice interaction. It improves how devices deliver information and interact naturally.

Hardware	Model	Performance benchmark
RDK X5 USB speaker / wired headset	Matcha	Generated text: 你好我是地瓜机器人 (2044 ms) Generation time: 780 ms (8-core CPU)

Hardware Connection

• Plug a USB speaker into a USB port on the RDK X5 development board.
• Plug a wired headset into the earphone audio jack on the RDK X5 development board.

Environment Setup

Install Dependencies

# Install dependencies
sudo apt update
sudo apt install libasound2-dev

Build sherpa-onnx

Caution

• CMake pulls dependency code. Make sure GitHub is reachable; retry if it fails.
• If you have already built it, skip this step.

git clone https://github.com/k2-fsa/sherpa-onnx.git
cd sherpa-onnx
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make -j6
make install .

Get the Sample Code and Build

wget https://archive.d-robotics.cc/downloads/rdk_demo/rdk_x5_demo/tts_demo_cpp.tar.gz
tar zxvf tts_demo_cpp.tar.gz
cd tts_demo_cpp
cmake -S . -B build
cmake --build build -j6

Run the Sample

Tip

• This feature generates audio from the input text and plays it through the speaker.
• To specify the audio device at runtime, see Earphone Audio Jack.
• Model loading takes a moment after startup. Please wait.

# Run from the tts_demo_cpp directory
./build/tts_play --text '你好我是地瓜机器人' --device plughw:0,0