ReSpeaker 2-Mic Array

Pre-Soldered ESP32 Controller

A powerful XIAO ESP32S3 is pre-soldered via the I2S pins for solderless development
Dual Microphone Array

2 high performance digital microphones capture far-field speech up to 3 meters
Onboard Audio Algorithms

Powered by XMOS XU-316 with advanced NLU algorithms for voice processing
Open Source Compatible

Compatible with Arduino, PlatformIO, MicroPython, CircuitPython
Voice Assistant Integration

Works with Home Assistant via ESPHome, Amazon Alexa, Google Assistant
RGB LED Feedback

Programmable WS2812 RGB LED for visual interface and status indication

ReSpeaker Lite 2-Mic Array Voice Kit Overview

The ReSpeaker Lite 2-Mic Array Voice Kit is a high-performance open source voice assistant development kit powered by XMOS XU316 AI Sound and Audio chipset. The kit integrates the ReSpeaker Lite dual-microphone array and a powerful XIAO ESP32S3 processor, offering exceptional voice recognition, noise reduction, and voice processing capabilities thanks to its onboard AI NLU algorithms.

This kit provides firmware integration with Home Assistant via ESPHome, making it ideal for smart voice assistants and home automation applications.

Key Features

The kit features a pre-soldered ESP32 controller (XIAO ESP32S3) connected via I2S pins, providing a solderless experience for further development and integration. The dual microphone array captures and extracts far-field speech and voice up to 3 meters even in noisy environments, cancelling point noise using two microphone input.

Powered by XMOS XU-316 AI sound and audio chip, the kit includes Natural Language Understanding algorithms for Interference Cancellation (IC), Acoustic Echo Cancellation, Noise Suppression, and Automatic Gain Control (AGC), enabling high quality voice capture.

Hardware Overview

The hardware architecture features a comprehensive flowchart showing the integration between components. The board includes dual microphones, power indicators, RGB lighting, mute functionality, user buttons, and various connectivity options including USB Type-C, speaker connectors, and 3.5mm headphone jack.

Applications

The ReSpeaker Lite is perfectly suited for smart speakers and virtual assistants, working with Amazon Alexa and Google Assistant to improve voice command recognition. It's also ideal for audio processing development projects involving audio signal processing and analysis, conference systems ensuring clear communication during video and audio conferences, voice-based remote control cars, and keywords spotting and wake-up applications.

Parameter	Specification
General
Core Chip	XMOS XU316
Digital Microphones	High-Performance Digital Microphones * 2
Sensitivity	-26 dBFS
Acoustic Overload Point	120 dBL
SNR	64 dBA
Power Supply	USB 5V, External 5V
Dimensions	35*86 mm
Audio Output	Speaker Connector / 3.5mm Headphone Jack
Maximum Sampling Rate	16Khz
Speaker	Supports 5W Amplifier Speakers
XIAO ESP32S3
Processor	ESP32-S3R8 Xtensa LX7 dual-core, 32-bit processor running up to 240 MHz
Wireless	Complete 2.4GHz WiFi subsystem BLE: Bluetooth 5.0, Bluetooth mesh
On-chip Memory	8M PSRAM & 8MB Flash
Interface	1x UART, 1x IIC, 1x IIS, 1x SPI,11x GPIO(PWM), 9x ADC, 1x User LED, 1x Charge LED 1x Reset button, 1x Boot button
Dimensions	21 x 17.5mm
Power	Input voltage (Type-C): 5V Input voltage (BAT): 4.2V Circuit operating Voltage (ready to operate): - Type-C: 5V@19mA - BAT: 3.8V@22mA Charging battery current: 100mA
Low Power Consumption Model (Supply Power: 3.8V)	Modem-sleep Model: ~ 25 mA Light-sleep Model: ~ 2mA Deep Sleep Model: ~ 14 μA
WiFi Enabled Power Consumption	Active Model: ~ 100 mA
BLE Enabled Power Consumption	Active Model: ~ 85 mA
Working Temperature	-40°C ~ 65°C