{"id":125977,"date":"2026-04-09T10:20:55","date_gmt":"2026-04-09T10:20:55","guid":{"rendered":"https:\/\/www.seeedstudio.com\/blog\/?p=125977"},"modified":"2026-04-17T02:13:20","modified_gmt":"2026-04-17T02:13:20","slug":"introducing-respeaker-flex-the-smart-ear-for-robotics-and-embedded-ai","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2026\/04\/09\/introducing-respeaker-flex-the-smart-ear-for-robotics-and-embedded-ai\/","title":{"rendered":"Introducing reSpeaker Flex: The Smart Ear for Robotics and Embedded AI"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\" noreferrer noopener\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1030\" height=\"539\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-1030x539.jpg\" alt=\"\" class=\"wp-image-125978\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-1030x539.jpg 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-300x157.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-768x402.jpg 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-1536x804.jpg 1536w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-2048x1072.jpg 2048w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-32x17.jpg 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1200x628-1024x536.jpg 1024w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/a><\/figure>\n\n\n\n<p><strong>Voice<\/strong> is becoming a core interface for the next generation of physical AI systems, from <strong>robots<\/strong> and <strong>smart terminals<\/strong> to <strong>interactive devices<\/strong> embedded in everyday environments. To enable reliable, far-field, and noise-robust voice interaction in these scenarios, the underlying <strong>voice interface hardware<\/strong> needs to be both powerful and flexible.<\/p>\n\n\n\n<p><strong><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\">reSpeaker Fle<\/a><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">x<\/a><\/strong> is designed exactly for that.<\/p>\n\n\n\n<p>It is a versatile <strong>4-microphone array voice solution<\/strong>, with <strong>seperated mic array board and main board<\/strong>, built for robotics and embedded applications such as smart digital signage, kiosks, and smart toys. Powered by the <strong>XMOS XVF3800<\/strong>, it combines advanced on-board audio processing with a modular hardware design, making it easier than ever to build scalable, high-performance voice-enabled systems.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Powerful Voice pickup and Audio Processing for Real-World Voice Interaction<\/h2>\n\n\n\n<p>At its core, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> integrates <strong>AI acoustic algorithms <\/strong> directly on the device. This includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Acoustic Echo Cancellation (AEC)<\/strong>: removes speaker playback echo from the microphone input for clearer two-way communication(full-duplex communication).<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"reSpeaker Flex Performs AEC and Wake Word Detection\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/tDNBpNKloHU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Multi-beamforming<\/strong>: focuses on voices from specific directions while reducing surrounding noise for better voice interaction in multi-speaker environments.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Noise suppression (NS)<\/strong>: reduces background and device inner noise(e.g., motor noise) to deliver higher-quality voice pickup in noisy environments.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Noise Suppression Test on reSpeaker Flex\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/TQp_8AGE5YA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>De-reverberation<\/strong>: minimizes room echo and reflections for cleaner voice capture in reverberant spaces.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Direction of Arrival (DoA)<\/strong>: detects where sound is coming from, enabling robots to locate, face, or track speakers for more natural interaction.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Automatic Gain Control (AGC)<\/strong>: automatically adjusts volume levels to keep speech clear and consistent, providing better audio input for downstream STT and voice AI tasks.<\/li>\n<\/ul>\n\n\n\n<p>For example, in a robot project, r<a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">eSpeaker Flex 4-Mic Array<\/a> first uses Multi-beamforming to focus on the speaker&#8217;s voice while reducing surrounding noise. Noise Suppression and De-reverberation then further clean the audio by removing background noise, motor noise inside the robot and room reflections. At the same time, AEC eliminates playback echo from the robot&#8217;s own speaker to ensure clear full-duplex communication. AGC automatically balances voice levels for stable and consistent audio input, improving downstream STT for the robots&#8217;s brain to better process with. Meanwhile, DoA detects where the voice is coming from, allowing the robot to turn toward or track the speaker for more natural voice interaction.<\/p>\n\n\n\n<p>These algorithms work together to ensure that voice input remains clear, stable, and accurate, even in noisy, dynamic environments like public spaces or robotic systems with moving parts.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Innovative Modular Split Design Microphone Array<\/h2>\n\n\n\n<p>One of the defining features of <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> is its <strong>split architecture<\/strong>.<\/p>\n\n\n\n<p>The system separates:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>core processing board<\/strong><\/li>\n\n\n\n<li>The <strong>microphone array board<\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1030\" height=\"687\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-1030x687.png\" alt=\"\" class=\"wp-image-125980\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-1030x687.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-300x200.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-768x512.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-1536x1024.png 1536w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-2048x1365.png 2048w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-32x21.png 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-1024x683.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/1X1A4590-675x450.png 675w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p>These are connected via a flexible FPC cable.<\/p>\n\n\n\n<p>This design enables much greater flexibility in product integration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The mic array can be placed <strong>closer to the sound source<\/strong><\/li>\n\n\n\n<li>The core board can remain <strong>inside the device enclosure<\/strong><\/li>\n<\/ul>\n\n\n\n<p>In robotics or smart digital signage, this is a game changer. For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mount the circular mic array on a robot&#8217;s head, forehead, or chest for 360\u00b0 voice pickup.<\/li>\n\n\n\n<li>Embed the linear mic array into the top or side bezel of smart digital signage for directional 180\u00b0 voice capture in front of the display.<\/li>\n\n\n\n<li>Keep the processing board away from motors and servos<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1030\" height=\"773\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/img_v3_0210d_004c2586-29ba-4716-8948-bd393762874g-1030x773.jpg\" alt=\"\" class=\"wp-image-125981\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/img_v3_0210d_004c2586-29ba-4716-8948-bd393762874g-1030x773.jpg 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/img_v3_0210d_004c2586-29ba-4716-8948-bd393762874g-300x225.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/img_v3_0210d_004c2586-29ba-4716-8948-bd393762874g-768x576.jpg 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/img_v3_0210d_004c2586-29ba-4716-8948-bd393762874g-32x24.jpg 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/img_v3_0210d_004c2586-29ba-4716-8948-bd393762874g-1024x768.jpg 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/img_v3_0210d_004c2586-29ba-4716-8948-bd393762874g.jpg 1400w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Flexible Microphone Array Configurations<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> supports two standard array designs:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Circular 4-Mic Array (360\u00b0 Pickup)<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"773\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100070894-reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-1030x773.jpg\" alt=\"\" class=\"wp-image-125982\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100070894-reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-1030x773.jpg 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100070894-reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-300x225.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100070894-reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-768x576.jpg 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100070894-reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-32x24.jpg 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100070894-reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-1024x768.jpg 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100070894-reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3.jpg 1400w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Omnidirectional voice capture<\/li>\n\n\n\n<li>Supports <strong>360\u00b0 DoA detection<\/strong><\/li>\n\n\n\n<li>Ideal for robots and open interaction scenarios<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Linear 4-Mic Array (180\u00b0 Pickup)<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"773\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100099135-reSpeaker-Flex-XVF3800-Linear-4-1030x773.jpg\" alt=\"\" class=\"wp-image-125983\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100099135-reSpeaker-Flex-XVF3800-Linear-4-1030x773.jpg 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100099135-reSpeaker-Flex-XVF3800-Linear-4-300x225.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100099135-reSpeaker-Flex-XVF3800-Linear-4-768x576.jpg 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100099135-reSpeaker-Flex-XVF3800-Linear-4-32x24.jpg 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100099135-reSpeaker-Flex-XVF3800-Linear-4-1024x768.jpg 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/2-100099135-reSpeaker-Flex-XVF3800-Linear-4.jpg 1400w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Directional voice capture<\/li>\n\n\n\n<li>Optimized for <strong>front-facing interactions<\/strong><\/li>\n\n\n\n<li>Ideal for smart signage and kiosks<\/li>\n<\/ul>\n\n\n\n<p>This flexibility is designed for space-constrained projects, allowing developers to choose the right configuration based on how users interact with the device.<br><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">reSpeaker Flex&#8217;s Powerful Far-Field Voice Capture<\/h2>\n\n\n\n<p>Voice interaction shouldn&#8217;t require users to stand right next to a device.<\/p>\n\n\n\n<p><strong>Far-field voice capture up to 5 meters<\/strong>:<\/p>\n\n\n\n<p>Powered by advanced on-board AI acoustic algorithms, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> delivers reliable wake word detection at distances of up to 5 meters, as shown in the demo below. In real deployment scenarios, its performance can extend even further depending on the environment. With beamforming, reSpeaker Flex significantly enhances voice pickup from target directions, with recorded capture distances reaching 7\u20138 meters in some cases. This greatly improves the responsiveness and natural feel of voice interaction.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"reSpeaker Flex Performs AEC and Wake Word Detection\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/tDNBpNKloHU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><strong>Accurate sound source localization (DoA-Direction of Arrival):<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex Circular<\/a> can accurately detect the direction of incoming sound in real time, enabling robots and smart devices to locate, face, or follow speakers more naturally. This creates more responsive and intuitive voice interactions, especially in dynamic environments.<\/p>\n\n\n\n<p>This enables:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Natural interaction in larger spaces<\/li>\n\n\n\n<li>Better user experience for public-facing systems<\/li>\n\n\n\n<li>Reliable performance in multi-user environments<\/li>\n<\/ul>\n\n\n\n<p>The <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">circular mic array<\/a> further enhances this by enabling <strong>full spatial awareness<\/strong>, allowing systems to detect where a voice is coming from and respond accordingly.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Compact Yet High-Performance Hardware Design of reSpeaker Flex<\/h2>\n\n\n\n<p>Despite its capabilities, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> is built for <strong>space-constrained embedded systems<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"473\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-1030x473.png\" alt=\"\" class=\"wp-image-125985\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-1030x473.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-300x138.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-768x353.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-1536x705.png 1536w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-2048x940.png 2048w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-32x15.png 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/02724ae150c43fc9002b9d4f17d6c94e-1-1024x470.png 1024w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"629\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-1030x629.jpg\" alt=\"\" class=\"wp-image-125986\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-1030x629.jpg 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-300x183.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-768x469.jpg 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-1536x939.jpg 1536w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-2048x1251.jpg 2048w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-32x20.jpg 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/469f3248033cc587172713baddf2b4a7-1024x626.jpg 1024w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p>Key design details:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Circular array: 73 mm diameter, 44 mm mic spacing<\/li>\n\n\n\n<li>Linear array: 110 mm length, 33 mm spacing<\/li>\n\n\n\n<li>Bottom-firing microphones to reduce interference<\/li>\n<\/ul>\n\n\n\n<p>This allows seamless integration into:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Robot heads and bodies<\/li>\n\n\n\n<li>Display bezels<\/li>\n\n\n\n<li>Compact enclosures<\/li>\n<\/ul>\n\n\n\n<p>Smaller size, but no compromise on performance.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">reSpeaker&#8217;s Developer-Friendly Integration<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> is designed to reduce friction for developers.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dual Interface Support<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>USB (Plug-and-Play)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Works with Raspberry Pi, NVIDIA Jetson, PCs<\/li>\n\n\n\n<li>No drivers required<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>I2S (MCU Integration)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Compatible with microcontroller platforms like Arduino and XIAO<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Preconfigured Variants<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>No XIAO versions (<a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">100005504<\/a>, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Linear-4-p-6738.html\" target=\"_blank\" rel=\"noreferrer noopener\">100099135<\/a>)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Pre-installed USB audio firmware<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>XIAO ESP32S3 versions (<a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-p-6739.html\" target=\"_blank\" rel=\"noreferrer noopener\">100070894<\/a>, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Linear-4-with-XIAO-ESP32S3-p-6736.html\" target=\"_blank\" rel=\"noreferrer noopener\">100026178<\/a>)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Pre-installed I2S firmware<\/li>\n\n\n\n<li>Ready for embedded and IoT scenarios<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>All versions support <strong>DFU mode<\/strong>, allowing developers to switch firmware as needed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ecosystem Compatibility<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Native support for <strong>ESPHome<\/strong> and <strong>Home Assistant<\/strong> (<a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-with-XIAO-ESP32S3-p-6739.html\" target=\"_blank\" rel=\"noreferrer noopener\">XIAO versions<\/a>)<\/li>\n\n\n\n<li>Easy integration into smart home and IoT systems<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"508\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-1030x508.png\" alt=\"\" class=\"wp-image-125987\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-1030x508.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-300x148.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-768x379.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-32x16.png 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-1-1024x505.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-1.png 1400w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"446\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-3-1030x446.png\" alt=\"\" class=\"wp-image-125989\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-3-1030x446.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-3-300x130.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-3-768x332.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-3-32x14.png 32w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-3-1024x443.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2026\/04\/image-3.png 1400w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Scalable and Customizable for Production<\/h2>\n\n\n\n<p>Beyond prototyping, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> is built with <strong>production in mind<\/strong>.<\/p>\n\n\n\n<p>Customization options include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Microphone array size and shape adjustments<\/li>\n\n\n\n<li>Hardware modifications for specific form factors<\/li>\n\n\n\n<li>Acoustic and algorithm tuning<\/li>\n<\/ul>\n\n\n\n<p>This makes it suitable for companies looking to deploy voice-enabled products at scale, not just experiment.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">reSpeaker Flex&#8217;s Application Scenarios<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Robotics and Embodied AI<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> enables robots to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Detect wake words<\/li>\n\n\n\n<li>Perform speech-to-text (STT)<\/li>\n\n\n\n<li>Understand intent<\/li>\n\n\n\n<li>Execute voice commands<\/li>\n<\/ul>\n\n\n\n<p>With support for <strong>ROS2<\/strong>, it integrates smoothly into robotic systems.<\/p>\n\n\n\n<p>Its flexible placement allows microphone arrays to be mounted on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Head<\/li>\n\n\n\n<li>Ears<\/li>\n\n\n\n<li>Chest<\/li>\n\n\n\n<li>External structures (e.g., robotic arms)<\/li>\n<\/ul>\n\n\n\n<p>An upgraded design also supports a <strong>10W amplifier<\/strong>, enabling strong text-to-speech (TTS) output for more natural interactions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Smart Toys and Companion Devices<\/h3>\n\n\n\n<p>For interactive toys and educational devices, <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> offers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Accurate voice capture in noisy environments<\/li>\n\n\n\n<li>On-device processing for <strong>privacy protection<\/strong><\/li>\n\n\n\n<li>Support for conversational AI experiences<\/li>\n<\/ul>\n\n\n\n<p>This makes it ideal for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Voice storytelling<\/li>\n\n\n\n<li>Learning assistants<\/li>\n\n\n\n<li>AI companions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Smart Voice Terminals<\/h3>\n\n\n\n<p>In kiosks, vending machines, and digital signage:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Linear-4-p-6738.html\" target=\"_blank\" rel=\"noreferrer noopener\">Linear arrays<\/a> fit seamlessly into narrow bezels<\/li>\n\n\n\n<li>Far-field + noise suppression ensures accuracy in public spaces<\/li>\n<\/ul>\n\n\n\n<p>This enables:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Touch-free interaction<\/li>\n\n\n\n<li>Faster user experiences<\/li>\n\n\n\n<li>Improved accessibility<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Voice Assistants and Smart Home<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> integrates with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Amazon Alexa<\/li>\n\n\n\n<li>Google Assistant<\/li>\n\n\n\n<li>Home Assistant<\/li>\n<\/ul>\n\n\n\n<p>It enables reliable far-field voice control for smart home automation and connected devices.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Conference and Communication Systems<\/h3>\n\n\n\n<p>With USB connectivity, it works directly with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Microsoft Teams<\/li>\n\n\n\n<li>Zoom<\/li>\n<\/ul>\n\n\n\n<p>The <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">4-mic array<\/a> supports:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Multi-person voice pickup<\/li>\n\n\n\n<li>Beamforming for clarity<\/li>\n\n\n\n<li>Real-time interaction feedback<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Industrial Voice Control<\/h3>\n\n\n\n<p>In industrial environments,<a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\"> reSpeaker Flex<\/a> provides:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High recognition accuracy under heavy noise<\/li>\n\n\n\n<li>Hands-free control for machinery and systems<\/li>\n<\/ul>\n\n\n\n<p>This improves both efficiency and safety in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Factories<\/li>\n\n\n\n<li>Retail operations<\/li>\n\n\n\n<li>Commercial environments<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Designed for the Next Generation of Interactive Voice AI<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">reSpeaker Flex<\/a> is more than just a microphone array. It is a <strong>complete voice interface solution<\/strong> designed for real-world voice interaction deployment.<\/p>\n\n\n\n<p>With:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Advanced on-device audio processing<\/li>\n\n\n\n<li>Flexible hardware architecture<\/li>\n\n\n\n<li>Developer-friendly integration<\/li>\n\n\n\n<li>Scalable customization<\/li>\n<\/ul>\n\n\n\n<p>It provides a solid foundation for building <strong>embodied AI systems that can hear, understand, and respond reliably<\/strong>.<\/p>\n\n\n\n<p><strong>reSpeaker Flex is the smart ear for embodied AI.<\/strong><\/p>\n\n\n\n<p>Get one <a href=\"https:\/\/www.seeedstudio.com\/reSpeaker-Flex-XVF3800-Circular-4-p-6737.html\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a> and start building now!<\/p>\n\n\n\n<p>Check the Getting Started Tutorial: <a href=\"https:\/\/wiki.seeedstudio.com\/respeaker_flex_introduction\/\">Getting Started with reSpeaker Flex | Seeed Studio Wiki<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voice is becoming a core interface for the next generation of physical AI systems, from<\/p>\n","protected":false},"author":3659,"featured_media":125991,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"iawp_total_views":0,"footnotes":"[]"},"categories":[4391,4394,5007,1,4393],"tags":[5412,1086],"class_list":["post-125977","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-build","category-deploy","category-feature","category-news","category-tech","tag-digital-signage","tag-robotics"],"yoast_head":"<!-- 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