ReSpeaker Lite Voice Assistant Kit combines XMOS XU-316 and ESP32-S3 for advanced voice processing, Home Assistant integration

Seeed Studio’s ReSpeaker Lite Series includes the ReSpeaker Lite 2-Mic Array and Voice Assistant Kit, featuring the XMOS XU-316 AI sound chip for advanced voice processing and integration with Home Assistant via ESPHome. It’s perfect for smart home control with far-field voice capture and noise cancellation.

The kit combines the ReSpeaker Lite dual-microphone array with the XIAO ESP32S3 module for voice recognition, noise reduction, and processing. It supports WiFi, BLE 5.0, and has a 2.4GHz rod antenna. It also offers I2S and USB connectivity for use with microcontrollers and SBCs, making it ideal for smart voice assistants and home automation.

We’ve previously covered the NXP i.MX RT106F & RT106A/L, where NXP i.MX RT106A  can run voice assistant software with features like acoustic echo cancellation, ambient noise reduction, beamforming, barge-in, and playback processing. We’ve also written about other ReSpeaker boards, such as the ReSpeaker 4-Mic Array board, ReSpeaker Core board, and ReSpeaker Core v2. Feel free to check if you are interested in this product.

Seeed Studio’s ReSpeaker Lite specification

• Wireless Module – XIAO ESP32S3
  • MCU – Espressif Systems ESP32-S3R8 dual-core Tensilica LX7 microcontroller @ 240 MHz, 512KB RAM, 8MB PSRAM
  • Storage – 8MB SPI flash
  • Wireless – 2.4 GHz WiFi 4 and Bluetooth 5,  Bluetooth mesh
  • Antenna – External 2.4GHz rod antenna
• Audio
  • Controller – XMOS XU-316 AI sound and audio chip
    • Sampling Rate – 16KHz maximum
    • Automatic Speech Recognition Algorithms – Interference Cancellation, Acoustic Echo Cancellation, Noise Suppression, Voice-to-Noise Ratio (VNR), and Automatic Gain Control (AGC)
  • Microphone – 2x Digital PDM MEMS microphones
    • Sensitivity – -26 dBFS
    • Acoustic Overload Point – 120 dBL
    • SNR – 64 dBA
    • Far-Field Voice Capture – Up to 3m with Advanced noise-cancellation
  • Speaker – Mono Enclosed Speaker
    • Input Power – 5W
    • Impedance – 4ohm±15%
    • Output S.P.L – 88±3dB
    • Distortion – 10% Max
    • Frequency Range – FO—-20kHz
    • Resonant Frequency – Fb: 125Hz ±20% and Fo: 500Hz ±20%
  • Audio Output – Speaker Connector and 3.5mm Headphone Jack
• USB – USB Type-C Port for power and data transmission.
• Interfaces – I2S and USB
• Misc
  • Programmable WS2812 RGB LED provides visual feedback
  • Power LED and Mute LED
  • Buttons for User and Mute
• Power Supply – 5V via Type-C USB port or external 5V
• Dimensions – 95 x 92 x 42mm (Full kit)

ReSpeaker Lite Voice Assistant Kit integrates with Home Assistant via ESPHome firmware, supports Amazon Alexa and Google Assistant, and is compatible with Arduino, PlatformIO, MicroPython, and CircuitPython. The kit supports custom firmware updates via DFU-Util and offers I2S and USB connections for use with MCUs, SBCs, and PCs like Raspberry Pi. You’ll find a getting-started guide and can explore various testing and applications such as I2S Test, Streams Generator, CSV Converter, MP3 Player, Keyword Spotting, and MQTT Audio Streaming on the wiki. The guides also include instructions for building a Voice Assistant for Home Assistant using custom wake words.

The ReSpeaker Voice Assistant Kit with 5W speaker and black acrylic enclosure is now available for $33.91 on the Seeed Studio store, and you’ll find the ReSpeaker Lite board only for $24.90 and the ReSpeaker Voice Assistant Kit for $29.91 on the same page.

Sayantan Nandy

Sayantan Nandy, an electronics engineer with over four years of hands-on experience in PCB design, circuit development and power electronics, is proficient in EAGLE CAD, Ki-Cad, and Altium. He has a proven track record of delivering efficient and effective systems. His expertise extends from R&D, and prototyping to production support, making him a valuable asset to any engineering team.

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