{"id":23368,"date":"2000-10-19T00:00:00","date_gmt":"2000-10-19T00:00:00","guid":{"rendered":"http:\/\/www.sweetwater.com\/sweetcare\/?p=23368"},"modified":"2007-04-27T00:00:00","modified_gmt":"2007-04-27T00:00:00","slug":"av-option-require-universal-slave-driver-usd","status":"publish","type":"articles","link":"https:\/\/www.sweetwater.com\/sweetcare\/articles\/av-option-require-universal-slave-driver-usd\/","title":{"rendered":"Why does AV Option require a Universal Slave Driver (USD)?"},"content":{"rendered":"<p>The USD is required to give Pro Tools &#8220;top of frame&#8221; information from a remote video device so that audio and video are matched with sample accuracy.  This is important when digitizing video into Pro Tools.The second purpose of the USD is to resolve the sample clock of Pro Tools to video black, a common reference to which the ABVB card and any external video device should also be resolved.<\/p>\n","protected":false},"featured_media":0,"template":"","categories":[],"tags":[],"storecat":[],"itemids":[],"manufacturers":[33300],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"Check out the Why does AV Option require a Universal Slave Driver (USD)? page at Sweetwater \u2014 the world&#039;s leading music technology and instrument retailer!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sweetwater.com\/sweetcare\/articles\/av-option-require-universal-slave-driver-usd\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why does AV Option require a Universal Slave Driver (USD)? - SweetCare\" \/>\n<meta property=\"og:description\" content=\"The USD is required to give Pro Tools &#8220;top of frame&#8221; information from a remote video device so that audio and video are matched with sample accuracy. 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