Key Technical Advantages
A. AI-Driven Audio Front-End (AFE)
XMOS XU316 Intelligence: Built-in Natural Language Understanding (NLU) and AI ASR algorithms that handle complex audio processing at the edge.
Far-Field Voice Capture: 2 high-performance digital microphones capable of extracting clear voice commands from noisy environments up to 3 meters away.
Professional DSP Suite: Integrated Interference Cancellation (IC), Acoustic Echo Cancellation (AEC), Noise Suppression, Voice-to-Noise Ratio (VNR) enhancement, and Automatic Gain Control (AGC).
B. Universal Compatibility
I2S Interface: Native support for ESP32S3 (Sense), Adafruit QT Py, and other mainstream MCU platforms.
USB Audio Class 2.0 (UAC2): Plug-and-play compatibility with Raspberry Pi, PC, and Mac for rapid desktop-based development.
DFU Support: Easy firmware updates via DFU-Util, allowing for deep customization of the XU316 internal logic.
C. Flexible Power & Interaction
Dual Power Input: Supports both USB 5V and external 5V power supplies for standalone or integrated applications.
Visual Interface: Programmable WS2812 RGB LED for customizable status indicators and interactive lighting effects.
Core Hardware Specifications
| Category | Specification | Technical Highlight |
| Main Chipset | XMOS XU316 | AI Sound & Audio specialized silicon |
| Microphones | Dual Digital Mic Array | SNR: 64 dBA |
| Acoustic Limit | 120 dB SPL | High Acoustic Overload Point for loud environments |
| Audio Output | 3.5mm Jack / JST Speaker | Supports 5W Power Amplifier for direct speaker drive |
| Sampling Rate | 16kHz (Standard Voice) | Optimized for speech recognition accuracy |
| Dimensions | 35 x 86 mm | Slim linear form factor for easy integration |
Featured Development Projects (11-in-1 Library)
Accelerate your AI voice journey with our curated ESP32S3 & AudioTools project suite:
I2S Protocol Sync: Verify data integrity between the mic array and ESP32S3 using square-wave testing.
RGB UI Design: Full control over the WS2812 LED via GPIO1 for intuitive user feedback.
Digital Volume Control: Programmatic volume adjustment via I2C commands.
Custom User Button: Reserved USR pin (XMOS) for programmable triggers or mode switching.
Audio Loopback: Real-time Mic-to-Speaker routing to test the complete I2S signal chain.
Sine Wave Generator: Utilize the AudioTools framework to generate and play precise frequencies.
Data Analytics (CSV Converter): Capture raw I2S audio and convert it to CSV for spectral analysis.
Thematic Playback: Memory-efficient playback of Star Wars themes using I2S output.
MP3 Player Integration: Play MP3 files directly from SPIFFS with metadata extraction support.
IoT MQTT Streaming: Encode audio to WAV and stream to an MQTT Broker via Wi-Fi.
Edge AI Keyword Spotting: Real-time keyword recognition (Yes/No/Unknown) using TensorFlow Lite models.
Applications
Voice-Controlled Appliances: Smart fans, light switches, and AC controllers.
Edge AI Prototypes: Developing local KWS (Keyword Spotting) systems without cloud dependency.
Educational Kits: Learning AI audio processing with ESP32S3 and XMOS.
Industrial Monitoring: Acoustic anomaly detection in machinery using the far-field mic array.
Support & Quality Commitment
Technical Resources: Documentation and project source code are available upon request from our customer service team.
SISTC Quality: Like all our MEMS-based products, this board follows our Strict Non-Vacuum Packaging Standard to protect the integrity of the digital microphone diaphragms.
