{"id":16958,"date":"2018-05-22T11:48:37","date_gmt":"2018-05-22T03:48:37","guid":{"rendered":"http:\/\/www.seeedstudio.com\/blog\/?p=16958"},"modified":"2018-10-19T10:47:08","modified_gmt":"2018-10-19T02:47:08","slug":"adding-to-the-family-respeaker-mic-array-v2-0","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2018\/05\/22\/adding-to-the-family-respeaker-mic-array-v2-0\/","title":{"rendered":"Adding to the Family: ReSpeaker Mic Array v2.0"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Adding voice interactivity to your device\/project\/product is something that many people would love to do. In 2016 Seeed, with the help of our <a href=\"https:\/\/www.kickstarter.com\/profile\/seeed\/created\" target=\"_blank\">Kickstarter<\/a> backers, pushed out the <\/span><a href=\"https:\/\/www.seeedstudio.com\/ReSpeaker-Core-Based-On-MT7688-and-OpenWRT-p-2716.html\"><span style=\"font-weight: 400;\">ReSpeaker Core<\/span><\/a><span style=\"font-weight: 400;\"> and the <\/span><a href=\"https:\/\/www.seeedstudio.com\/ReSpeaker-Mic-Array-Far-field-w--7-PDM-Microphones--p-2719.html\"><span style=\"font-weight: 400;\">ReSpeaker Mic Array<\/span><\/a><span style=\"font-weight: 400;\"> (discontinued). Over time we began to realize two things: first, that we were very interested in continuing to pursue this area of voice interaction, and second that we needed to have solutions that we could customize for customers who wanted them to scale. We released the <\/span><a href=\"https:\/\/www.seeedstudio.com\/ReSpeaker-2-Mics-Pi-HAT-p-2874.html\"><span style=\"font-weight: 400;\">2-mic array<\/span><\/a><span style=\"font-weight: 400;\"> and <\/span><a href=\"https:\/\/www.seeedstudio.com\/ReSpeaker-4-Mic-Array-for-Raspberry-Pi-p-2941.html\"><span style=\"font-weight: 400;\">4-mic array<\/span><\/a><span style=\"font-weight: 400;\"> HATS for <a href=\"https:\/\/www.raspberrypi.org\/\" target=\"_blank\">Raspberry Pi<\/a>, enabling makers on a budget to get into the voice interface world and learn what is possible. However, for the second goal we began to look into new solutions for developers. This is resulting in the the <\/span><a href=\"https:\/\/www.seeedstudio.com\/ReSpeaker-Mic-Array-v2.0-p-3053.html\"><span style=\"font-weight: 400;\">ReSpeaker Mic Array v2.0<\/span><\/a><span style=\"font-weight: 400;\">, and <\/span><a href=\"http:\/\/wiki.seeedstudio.com\/ReSpeaker_Core_v2.0\/\"><span style=\"font-weight: 400;\">ReSpeaker Core v2.0<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><iframe title=\"ReSpeaker Mic Array v2.0 Unboxing\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/1zJwrD5yURM?start=13&#038;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><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Introducing the ReSpeaker Mic Array v2.0<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The ReSpeaker Mic Array v2.0 is a hardware-based solution for creating or adding voice-interface to your projects. The board is a far-field microphone array device capable of detecting voices up to 5m away even with the presence of background noise. The onboard hardware-enabled algorithms are powered by the XMOS XVF-3000. It is compatible with linux, macOS, and Windows.<\/span><\/p>\n<p><a href=\"\/wp-content\/uploads\/2018\/05\/playback.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-16961\" src=\"\/wp-content\/uploads\/2018\/05\/playback.jpg\" alt=\"playback\" width=\"1024\" height=\"626\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2018\/05\/playback.jpg 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2018\/05\/playback-300x183.jpg 300w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><strong>What has changed?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">There are three major changes, all stemming from the <em>XMOS XVF3000<\/em>: <\/span><\/p>\n<p><span style=\"font-weight: 400;\"><strong><em>The first major change is in the quality of the algorithms.<\/em><\/strong> The ReSpeaker Mic Array v2.0 continues to have the onboard hardware enabled audio processing algorithms that its predecessor had &#8211; that hasn\u2019t changed. What has changed is the quality of those algorithms. Specifically the AEC (Acoustic Echo Cancellation) algorithm received quite an upgrade. This is now a full-duplex solution, meaning that the device can continue to play audio while also listening to its environment. Previously the audio had to be paused in order to properly record. \u00a0It also enables barge-in support. Barge-in supports new voice\/sounds when they enter the environment, providing them a chance to be heard, even when noticeably quieter than other sounds. <\/span><\/p>\n<p><a href=\"\/wp-content\/uploads\/2018\/05\/1526541987443676.gif\"><img decoding=\"async\" class=\"alignnone size-full wp-image-16959\" src=\"\/wp-content\/uploads\/2018\/05\/1526541987443676.gif\" alt=\"1526541987443676\" width=\"830\" height=\"340\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\"><strong><em>Second, we reduced the microphones from 7 to 4<\/em><\/strong>. The reduction in microphones has allowed us to reduce the cost of the board. However, with the updated algorithms stated above, the final voice processing quality has not dropped, but instead improved. Below is a demo of the AEC in action. You can hear the device playing music as our engineer speaks:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<p><audio controls=\"controls\">\u00a0\u00a0\u00a0<source type=\"audio\/wav\" src=\"https:\/\/github.com\/SeeedDocument\/ReSpeaker_Mic_Array_V2\/raw\/master\/res\/channel1_raw.wav\" \/><source type=\"audio\/ogg\" src=\"https:\/\/github.com\/SeeedDocument\/ReSpeaker_Mic_Array_V2\/raw\/master\/res\/channel1_raw.ogg\" \/>\u00a0<\/audio><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here is the audio file the device was playing:<\/span><\/p>\n<p><audio controls=\"controls\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<source type=\"audio\/wav\" src=\"https:\/\/github.com\/SeeedDocument\/ReSpeaker_Mic_Array_V2\/raw\/master\/res\/channel5_playback.wav\" \/><source type=\"audio\/ogg\" src=\"https:\/\/github.com\/SeeedDocument\/ReSpeaker_Mic_Array_V2\/raw\/master\/res\/channel5_playback.ogg\" \/>\u00a0<\/audio><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here is the end result post-processing:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<p><audio controls=\"controls\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<source type=\"audio\/wav\" src=\"https:\/\/github.com\/SeeedDocument\/ReSpeaker_Mic_Array_V2\/raw\/master\/res\/channel0_asr.wav\" \/><source type=\"audio\/ogg\" src=\"https:\/\/github.com\/SeeedDocument\/ReSpeaker_Mic_Array_V2\/raw\/master\/res\/channel0_asr.ogg\" \/>\u00a0<\/audio><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"><em><strong>Last, this board is able to be customized.<\/strong> <\/em>The new chipset allows for both a circular array and linear array to be designed, as well as the ability to change the spacing of the microphones. This is great for fitting the solution into your products. We are looking forward to including this chipset into our OPL and also offering our own customization and manufacturing services for customers.<\/span><\/p>\n<p><a href=\"\/wp-content\/uploads\/2018\/05\/bazaar816974_img_5988.png\"><img decoding=\"async\" class=\"alignnone size-full wp-image-16960\" src=\"\/wp-content\/uploads\/2018\/05\/bazaar816974_img_5988.png\" alt=\"bazaar816974_img_5988\" width=\"1200\" height=\"901\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2018\/05\/bazaar816974_img_5988.png 1200w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2018\/05\/bazaar816974_img_5988-300x225.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2018\/05\/bazaar816974_img_5988-1030x773.png 1030w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">We hope you enjoy the new version of the ReSpeaker Mic Array (<a href=\"https:\/\/www.seeedstudio.com\/ReSpeaker-Mic-Array-v2.0-p-3053.html\" target=\"_blank\">shop now<\/a>). For more technical information check out our <\/span><a href=\"http:\/\/wiki.seeedstudio.com\/ReSpeaker_Mic_Array_v2.0\/\"><span style=\"font-weight: 400;\">wiki<\/span><\/a><span style=\"font-weight: 400;\">. If you have questions or comments please post them on our <\/span><a href=\"https:\/\/forum.seeedstudio.com\/viewforum.php?f=87&amp;sid=12eec645c189e6d5ca156b21c101c1e8\"><span style=\"font-weight: 400;\">forum<\/span><\/a><span style=\"font-weight: 400;\">. For bulk sales or distribution requests contact <\/span><a href=\"mailto:distribution@seeed.cc\"><span style=\"font-weight: 400;\">distribution@seeed.cc<\/span><\/a><span style=\"font-weight: 400;\">. <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Adding voice interactivity to your device\/project\/product is something that many people would love to do.<\/p>\n","protected":false},"author":49,"featured_media":16961,"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":[1],"tags":[412,672,904,673,906,905,907],"class_list":["post-16958","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-new-product","tag-respeaker","tag-respeaker-mic-array-v2-0","tag-speech-recognition","tag-voice","tag-voice-interactivity","tag-voice-interface"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - 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