{"product_id":"respeaker-flex-xvf3800-linear-with-xiao-esp32s3","title":"reSpeaker Flex XVF3800 - Linear with XIAO ESP32S3","description":"\u003cp\u003eThe \u003ca href=\"\/collections\/seeed\" title=\"Seeed Products\"\u003eSeeed\u003c\/a\u003e \u003cstrong\u003ereSpeaker Flex XVF3800 - Linear with XIAO ESP32S3\u003c\/strong\u003e 4-Mic Array is designed for robots, smart signage, and other embodied AI applications that need reliable voice capture at a distance. Built around the \u003cstrong\u003eXMOS XVF3800\u003c\/strong\u003e, it combines four microphones with advanced audio processing to help systems hear voices clearly, even in noisy environments.\u003c\/p\u003e\n\u003cp\u003eOn-board AI acoustic algorithms, including \u003cstrong\u003eAcoustic Echo Cancellation (AEC)\u003c\/strong\u003e, \u003cstrong\u003ebeamforming\u003c\/strong\u003e, and \u003cstrong\u003enoise suppression\u003c\/strong\u003e, work together to reduce background noise, minimise echoes, and focus on the speaker's voice.\u003c\/p\u003e\n\u003cp\u003eThe array features a flexible split-board design and is available in two configurations: Linear and Circular. \u003cstrong\u003eThis product is the Linear version\u003c\/strong\u003e. If you require the Circular version, you can find it \u003ca href=\"\/products\/respeaker-flex-xvf3800-circular-with-xiao-esp32s3\" title=\"reSpeaker Flex XVF3800 - Circular with XIAO ESP32S3\"\u003e\u003cstrong\u003ehere\u003c\/strong\u003e\u003c\/a\u003e. Its adaptable design makes it easy to integrate into different products and enclosures, while support for both USB and I2S modes ensures compatibility with a wide range of hardware platforms.\u003c\/p\u003e\n\u003cp\u003eWhether you're building a voice-enabled robot, interactive display, or another embodied AI system, the 4-Mic Array provides clear far-field voice capture in a compact and adaptable design.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003eInnovative Modular Split Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: left;\"\u003e\n\u003cstrong\u003e\u003c\/strong\u003eSeparates the core processing board from the microphone array board via a flexible FPC cable, enabling easy integration in space-constrained robotics and embedded applications. For use cases such as desktop or humanoid robots, the mic array board can be positioned near the sound source, while the core board can be placed elsewhere inside the device. This design helps minimize interference from internal motor and servo noise, resulting in improved voice capture performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003eFlexible Array Configurations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable in two standard configurations: 4-mic circular array for 360° spatial pickup, and 4-mic linear array for 180° directional pickup.\u003c\/li\u003e\n\u003cli\u003eIn robotics applications - the circular array can be mounted on the robot’s head for omnidirectional voice capture.\u003c\/li\u003e\n\u003cli\u003eFor smart digital signage - the linear array is well-suited for front-facing placement, optimizing voice pickup for typical user interactions directly in front of the display.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003eXMOS XVF3800 for Advanced AI Audio Processing\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOn-board AI acoustic algorithms for better sound quality. Features AEC, multi-beamforming, de-reverberation, DoA, dynamic noise suppression, AGC, delivering stable and reliable voice capture performance.\u003c\/li\u003e\n\u003cli\u003eAEC (Acoustic Echo Cancellation) - AEC removes acoustic echo caused when sound played from the system 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.\u003c\/li\u003e\n\u003cli\u003eNS (Noise Suppression)\u003cem\u003e -\u003c\/em\u003e NS reduces unwanted background noise from captured audio. By identifying and attenuating non-speech components, such as fan noise, motor and servo noise, ambient chatter, keyboard typing, or environmental hum, NS enhances the SNR (signal-to-noise ratio) in real time. NS is essential in voice interactive systems including smart home and industrial voice control, voice assistants, educational devices, smart interactive terminals, and robots.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003ePowerful Far-Field Voice Capture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWith far-field voice capture up to 5 meters and the circular 4-microphone array (100005504, 100070894) supporting precise Direction of Arrival (DoA) detection, the reSpeaker Flex delivers reliable voice capture and accurate sound source localization for interactive and voice-driven applications.\u003c\/li\u003e\n\u003cli\u003eFar-field Voice Capture Up to 5m - This enables clear command recognition in larger spaces without requiring users to stand close to the device, making the reSpeaker Flex ideal for voice interactive setups like smart digital signage.\u003c\/li\u003e\n\u003cli\u003eCircular 4-Microphone Array Supports 360° DoA The circular 4-mic array enables accurate 360° DoA detection, allowing the reSpeaker Flex to identify where a voice is coming from. This spatial awareness enhances interaction performance, supports speaker tracking, provides a strong foundation for advanced beamforming, and allows users to interact with the robot from anywhere around it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eCompact Design for Embedded Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBottom-Firing Microphones - The acoustic ports are positioned on the back side of the mic array board, reducing interference from front-facing components. This design also allows the microphones to be placed closer to the sound source or device surface, maximizing voice pickup performance.\u003c\/li\u003e\n\u003cli\u003eCompact Size, Powerful Performance - With just 44 mm mic spacing and a diameter of 73 mm for the circular array, and 33 mm spacing with a length of 110 mm for the linear array, the design fits easily into space-constrained embedded applications. Despite its compact size, it delivers outstanding voice capture performance, achieved through the combination of optimized hardware design and acoustic tuning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eDeveloper-Friendly Integration\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe reSpeaker Flex with no XIAO versions (100005504, 100099135) come with factory-installed USB firmware.\u003c\/li\u003e\n\u003cli\u003eThe reSpeaker Flex with XIAO ESP32S3 versions (100070894, 100026178) come with factory-installed I2S firmware.\u003c\/li\u003e\n\u003cli\u003ePlug-and-Play via USB: A standard USB interface enables quick connection to devices such as Raspberry Pi, NVIDIA Jetson, and PCs running Windows, Linux, or macOS, no drivers or complex setup required.\u003c\/li\u003e\n\u003cli\u003eI2S for MCU Integration: Direct I2S support allows seamless integration with MCU platforms like the XIAO Series and Arduino, making it easy to build embedded voice-enabled applications with minimal hardware overhead.\u003c\/li\u003e\n\u003cli\u003eXIAO ESP32S3 Pre-Soldered Options: Two variants (100070894, 100026178) come with a pre-soldered XIAO ESP32S3, enabling native support for ecosystems such as ESPHome and Home Assistant. This allows developers to easily extend applications into smart home scenarios and beyond.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eFast, Scalable, and Customizable for Production\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeeed Studio offers customization services include hardware modifications such as adjusting the size or shape of the microphone array board to better fit space-constrained robotics and embedded voice interaction scenarios. Algorithm tuning is also available to further optimize audio performance. For reference, similar approaches have been applied in open-source projects like the Reachy Mini desktop robot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCore Chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eXMOS XVF3800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmplifier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTexas Instruments TPA3139D2, Supports 10W Speakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAudio Algorithms\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAEC, AGC, DoA, Beamforming, VAD, Noise Suppression, De-reverberation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUSB Interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1x USB Type-C, For external connection and debugging;\u003cbr\u003e1x USB JST Connector, For internal routing and motherboard integration;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1x XIAO Compatible Pads;\u003cbr\u003e1x XMOS XVF3800 XTAG Debug Pads;\u003cbr\u003e1x XMOS XVF3800 io Pads;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAudio Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1x 3.5mm Audio Jack;\u003cbr\u003e1x 2-Pin Speaker Connector;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V Input: Via USB Type-C or 5V JST Connector;\u003cbr\u003e12V Input: Via 2-Pin Terminal 12V Connector;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMic Array Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1x 24-Pin FPC Connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eButton\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1x Reset Button;\u003cbr\u003e1x Boot Button;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Sampling Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eMic Array Board\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMicrophone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4x High-performance PDM MEMS microphones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eArray Topology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e33 mm spacing arranged Linear Mic Array\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePickup Pattern\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180° directional audio capture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePickup Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 5 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1x 24-Pin FPC connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 × M3 mounting holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/media-cdn.seeedstudio.com\/media\/wysiwyg\/111-photo\/purple.jpg\" rel=\"noopener\" title=\"Hardware Overview Image 1\" target=\"_blank\"\u003eHardware Overview Image 1\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/media-cdn.seeedstudio.com\/media\/wysiwyg\/111-photo\/grey.jpg\" rel=\"noopener\" title=\"Hardware Overview Image 2\" target=\"_blank\"\u003eHardware Overview Image 2\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/media-cdn.seeedstudio.com\/media\/wysiwyg\/111-photo\/green.jpg\" rel=\"noopener\" title=\"FPC Mic Array Interface\" target=\"_blank\"\u003eFPC Mic Array Interface\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/files.seeedstudio.com\/wiki\/reSpeaker_flex\/reSpeaker_flex_flyer_en.pdf\" rel=\"noopener\" title=\"reSpeaker Flex Flyer - EN\" target=\"_blank\"\u003ereSpeaker Flex Flyer - EN\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.xmos.com\/documentation\/XM-014888-PC\/html\/index.html\" rel=\"noopener\" title=\"XMOS XVF3800 v3.2.1\" target=\"_blank\"\u003eXMOS XVF3800 v3.2.1\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/files.seeedstudio.com\/wiki\/ReSpeaker\/reSpeaker_Series_Flyer.pdf\" rel=\"noopener\" title=\"reSpeaker Series Flyer - EN\" target=\"_blank\"\u003ereSpeaker Series Flyer - EN\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/files.seeedstudio.com\/wiki\/reSpeaker_flex\/reSpeaker_xvf3800_flex_linear.step\" rel=\"noopener\" title=\"reSpeaker Flex XVF3800 Linear.step\" target=\"_blank\"\u003ereSpeaker Flex XVF3800 Linear.step\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/files.seeedstudio.com\/wiki\/reSpeaker_flex\/reSpeaker_xvf3800_flex_Separate.step\" rel=\"noopener\" title=\"reSpeaker Flex XVF3800 Core Board.step\" target=\"_blank\"\u003ereSpeaker Flex XVF3800 Core Board.step\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x reSpeaker Flex Core Board\u003c\/li\u003e\n\u003cli\u003e1x reSpeaker Flex Linear Mic Array Board\u003c\/li\u003e\n\u003cli\u003e1x 20cm FPC Cable\u003c\/li\u003e\n\u003cli\u003e1x Pin Connectors\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seeed","offers":[{"title":"Default Title","offer_id":55834751140225,"sku":"106880","price":49.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/respeaker-flex-xvf3800-linear-with-xiao-esp32s3-seeed-106880-1245891392.jpg?v=1782298183","url":"https:\/\/thepihut.com\/products\/respeaker-flex-xvf3800-linear-with-xiao-esp32s3","provider":"The Pi Hut","version":"1.0","type":"link"}