The SeeedReSpeaker Flex XVF3800 - Circular with XIAO ESP32S3 is a ready-to-use circular microphone array supplied in a durable protective enclosure, making it ideal for projects that need a neat, finished solution straight out of the box. With the XIAO ESP32S3 pre-soldered and the XMOS XVF3800 at its core, it delivers clear target voice capture for smart devices, robotics, interactive displays, and workplace applications.
The enclosed circular 4-microphone array provides 360° far-field voice pickup at distances of up to 5 metres, allowing it to capture speech clearly from any direction. On-board AI audio processing includes Acoustic Echo Cancellation (AEC), Automatic Gain Control (AGC), Direction of Arrival (DoA), Voice Activity Detection (VAD), dereverberation, beamforming, and noise suppression to help reduce unwanted noise and improve voice clarity in challenging environments.
Supporting both USB and I2S modes, the ReSpeaker Flex is easy to integrate into a wide range of embedded and AI projects. The protective enclosure not only gives the array a clean, professional appearance but also helps protect the hardware during installation and everyday use.
Features
XMOS XVF3800 Upgrade With Advanced AI Audio Processing
AEC (Acoustic Echo Cancellation) - AEC removes acoustic echo caused when sound played from a loudspeaker is picked up again by the microphone array. AEC is critical in full-duplex communication systems such as conferencing devices, voice assistants, and interactive systems.
AGC (Automatic Gain Control) - AGC automatically adjusts the microphone array input level to maintain a stable and consistent audio output. AGC is essential where users may speak at varying distances and volumes. With real-time AGC, the reSpeaker XVF3800 ensures more stable downstream ASR performance.
NS (Noise Suppression) - Noise Suppression reduces unwanted background noise from captured audio. By identifying and attenuating non-speech components—such as fan noise, ambient chatter, keyboard typing, or environmental hum—NS enhances the SNR (signal-to-noise ratio) in real time. NS is essential in voice-driven systems including smart home voice control, conferencing devices, voice assistants, and robotics.
Powerful Voice Capture
Far-field Voice Capture Up to 5m - (Watch the pickup range test from 12:20) This enables clear command recognition and interaction in larger spaces without requiring users to stand close to the device, making the reSpeaker XVF3800 ideal for smart home control, robotics, and room-scale deployments.
Circular 4-Microphone Array Supports 360° DoA - The circular 4-microphone array enables accurate 360° Direction of Arrival (DoA) detection, allowing the reSpeaker XVF3800 to identify where a voice is coming from. This spatial awareness enhances interaction logic, supports speaker tracking, and provides a strong foundation for advanced beamforming and multi-user scenarios.
Developer-Friendly
Plug-and-Play Simplicity - Standard USB interface enables easy connection with any USB-enabled device - from SBCs like Raspberry Pi and NVIDIA Jetson to PCs running Windows, Linux, or macOS. No drivers or complex setup required.
I2S Interface for MCU Integration - Direct I2S support allows seamless integration with MCU platforms like XIAO Series and Arduino, enabling embedded voice applications with minimal hardware overhead.
Compact Design for Embedded Applications - Bottom-firing microphones and a flat PCB for easy embedding into space-constrained devices without obstruction.
3.5mm Audio Interface - Provides flexible connectivity for external speakers or audio output devices, simplifying hardware design and ensuring compatibility across a wide range of embedded systems.
Seamless Integration for Deployment
reSpeaker XVF3800 is a go-to choice for fast building solutions that enable seamless hardware and software integration across diverse application scenarios.
With XIAO ecosystem compatibility, robotics adaptability, and streamlined Voice Agent enablement, it reduces integration complexity and shortens time-to-market.
