Seeed Studio reSpeaker Lite 2-Mic Array Voice Processing Development Board XMOS XU316 AI Audio Chip I2S/USB Compatible with XIAO ESP32S3

reSpeaker Lite Product Overview

The reSpeaker Lite is a high-performance open-source voice processing development kit from Seeed Studio, powered by the XMOS XU316 AI Sound and Audio chipset and featuring a dual high-performance digital microphone array, designed for speech recognition, voice control, and smart voice assistant development. The board supports both I2S and USB (UAC2) connections, and is compatible with Seeed Studio XIAO ESP32S3 (Sense), Adafruit QT Py, Raspberry Pi, and PC. With advanced onboard Natural Language Understanding (NLU) algorithms, it delivers comprehensive audio front-end processing including Interference Cancellation (IC), Acoustic Echo Cancellation (AEC), Noise Suppression (NS), Voice-to-Noise Ratio (VNR), and Automatic Gain Control (AGC). Available in both bare-board and pre-soldered XIAO ESP32S3 versions, the latter offers a solderless development experience via I2S. The reSpeaker Lite is widely used in smart voice assistants, smart home control, audio signal processing, and voice conferencing systems.

reSpeaker Lite Key Features

XMOS XU316 AI Audio Chip: Powered by the XMOS XU316 AI Sound and Audio chipset, optimized for audio processing and AI voice applications with powerful real-time audio signal processing capabilities.

Dual High-Performance Digital Microphone Array: Features 2 high-performance digital microphones supporting far-field voice capture up to 3 meters, effectively canceling point noise even in noisy environments.

Onboard AI Audio Front-End Algorithms: Built-in Interference Cancellation (IC) , Acoustic Echo Cancellation (AEC) , Noise Suppression (NS) , Voice-to-Noise Ratio (VNR) , and Automatic Gain Control (AGC) for high-quality voice capture.

I2S + USB Dual-Mode Connectivity: Supports I2S interface for connecting to XIAO ESP32S3, Adafruit QT Py, and other MCUs, and USB Audio Class 2.0 (UAC2) for plug-and-play connection to PCs and Raspberry Pi.

Pre-Soldered XIAO ESP32S3 Option: Available with pre-soldered XIAO ESP32S3 controller, connected via I2S pins for a solderless, out-of-the-box experience.

Programmable WS2812 RGB LED: Onboard programmable WS2812 RGB LED for custom lighting effects and visual interaction.

5W Speaker Output + 3.5mm Headphone Jack: Onboard speaker connector (supports 5W amplifier speakers) and 3.5mm headphone jack for audio output.

USB Type-C + External 5V Power: USB Type-C for power and data, plus external 5V power pads for flexible deployment.

ESPHome & Home Assistant Integration: Supports firmware integration with Home Assistant via ESPHome for seamless smart home ecosystem access.

Open Source Compatible: Compatible with Arduino, PlatformIO, MicroPython, and CircuitPython.

Mute Button & User-Defined Button: Onboard mute button (red LED indicator when pressed) and USR user-defined button for interactive control.

reSpeaker Lite Applications

The reSpeaker Lite is widely used in:

Smart Voice Assistants & Smart Speakers: Build natural language voice devices via ESPHome integration with Home Assistant, Amazon Alexa, and Google Assistant

Smart Home Voice Control: Seamless integration with Home Assistant for voice-controlled smart home devices

Voice Conferencing Systems: Clear conference call quality with dual microphone array + echo cancellation + noise suppression

Keyword Spotting & Voice Wake-Up: Ideal for keyword spotting, voice wake-up, and other interactive scenarios

Audio Signal Processing & Analysis: Suitable for various audio processing and voice analysis projects

Voice-Controlled Remote Device Development: Voice-based remote control device development

TinyML Voice Applications: Local voice inference and TinyML applications with XIAO ESP32S3

reSpeaker Lite Advantages

Plug-and-Play, No Drivers Required: Recognized as a "ReSpeaker Lite" audio device when connected via USB to PC or Raspberry Pi – no driver installation needed.

Flexible Dual-Version Options: Available as bare-board (107990273) and pre-soldered XIAO ESP32S3 (110061601) versions, with USB audio firmware pre-installed on the bare-board and I2S firmware on the pre-soldered version.

Far-Field Voice Capture (Up to 3 Meters): Dual high-performance digital microphones support far-field voice capture up to 3 meters, ensuring clear pickup even in noisy environments.

Comprehensive Audio Front-End Algorithms: XMOS XU316 chip provides interference cancellation, echo cancellation, noise suppression, VNR, and AGC for high-quality voice capture.

Cross-Platform Compatibility: I2S compatibility with XIAO ESP32S3, Adafruit QT Py, and other MCUs; USB compatibility with Raspberry Pi, Windows, Linux, and macOS PCs.

ESPHome + Home Assistant Ecosystem: Rapid integration with Home Assistant via ESPHome – ideal for smart voice assistants and home automation systems.

Open Source Development Support: Compatible with Arduino, PlatformIO, MicroPython, and CircuitPython for low-barrier development.

Onboard RGB LED Feedback: Programmable WS2812 RGB LED for rich status indication and visual interaction.

Dual Audio Output Interfaces: Supports 5W amplifier speakers and 3.5mm headphone output for flexible audio output needs.

Industrial-Grade Audio Specifications: SNR of 64 dBA and Acoustic Overload Point (AOP) of 120 dB SPL ensure high-quality audio capture.

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FAQs:

Q1: What versions does the reSpeaker Lite come in, and what are the differences?
A1: The reSpeaker Lite comes in two versions: bare-board version and pre-soldered XIAO ESP32S3 version . The bare-board version comes with factory-installed USB audio firmware, and can be used as a USB sound card when plugged into a PC. The pre-soldered version comes with factory-installed I2S firmware, with the XIAO ESP32S3 pre-soldered via I2S pins for a solderless experience and easy MCU integration.

Q2: What development platforms and operating systems does the reSpeaker Lite support?
A2: The reSpeaker Lite offers broad compatibility. Via the I2S interface, it connects to Seeed Studio XIAO ESP32S3 (Sense), Adafruit QT Py, and other MCU platforms; via USB (Audio Class 2.0), it connects to Raspberry Pi, Windows PC, Linux PC, and macOS PC. It is a plug-and-play modular voice interface that requires no drivers — simply plug it into your PC and it will be recognized as a “ReSpeaker Lite” audio device.

Q3: What are the microphone performance and voice pickup distance of the reSpeaker Lite?
A3: The reSpeaker Lite features 2 high-performance digital microphones supporting far-field voice capture up to 3 meters. Even in noisy environments, it effectively cancels point noise using dual-microphone input. Microphone sensitivity is -26 dBFS, Acoustic Overload Point (AOP) is 120 dB SPL, and SNR is 64 dBA.

Q4: What audio processing algorithms are onboard?
A4: Powered by the XMOS XU316 AI Sound and Audio chipset, the reSpeaker Lite features onboard AI audio front‑end algorithms, including: Interference Cancellation (IC), Acoustic Echo Cancellation (AEC), Noise Suppression (NS), Voice‑to‑Noise Ratio (VNR), and Automatic Gain Control (AGC). These algorithms enable high‑quality voice capture, making it ideal for speech recognition and voice control applications.

Q5: Does the reSpeaker Lite support Home Assistant and ESPHome?
A5: Yes. The reSpeaker Lite supports firmware integration with Home Assistant via ESPHome. The kit allows you to build your own natural language processor and connect to Home Assistant, Amazon Alexa Voice Service, Google Assistant, or cloud‑based speech‑to‑text services via ESPHome. It is an ideal choice for building smart voice assistants and home automation applications.

Q6: Does the reSpeaker Lite support local (offline) voice processing?
A6: Yes. The onboard algorithms — including interference cancellation, echo cancellation, and noise suppression — run locally on the XMOS XU316 chip without cloud connectivity. However, advanced features like speech recognition (ASR) and natural language understanding (NLU) typically require cloud services. You can also pair it with XIAO ESP32S3 for some local TinyML voice applications.

Q7: How do I update the firmware of the reSpeaker Lite?
A7: The reSpeaker Lite supports custom firmware updates via DFU‑Util. Firmware is available for download from the GitHub repository. Depending on your use case, you can flash either the USB firmware (to use the device as a USB sound card) or the I2S firmware (for use with XIAO ESP32S3 and other MCUs). The JTAG interface can also be used for debugging and programming the XU316.

Q8: What are the functions of the onboard buttons and RGB LED?
A8: The onboard Mute Button mutes the audio input when pressed, and the Mute LED (red) lights up simultaneously. The USR Button is a user‑defined button that can be programmed for custom control. The programmable WS2812 RGB LED supports custom lighting effects and provides a visual interface for your applications.

Q9: What audio output methods does the reSpeaker Lite support?
A9: The reSpeaker Lite supports two audio output methods: Speaker Connector – supports 5W amplifier speakers; 3.5mm Headphone Jack – allows connection of active speakers or headphones. The maximum sampling rate is 16 kHz.

Q10: What are the power supply options for the reSpeaker Lite?
A10: The reSpeaker Lite supports two power supply methods: USB Type‑C port (5V) – direct power via USB cable; External 5V power solder pads – connect an external 5V power supply via onboard pads, suitable for scenarios requiring independent power. Note that USB 5V and external 5V should not be used simultaneously.