{"id":133,"date":"2010-03-23T09:24:50","date_gmt":"2010-03-23T09:24:50","guid":{"rendered":"http:\/\/lushprojects.com\/blog\/?p=133"},"modified":"2010-03-23T09:24:50","modified_gmt":"2010-03-23T09:24:50","slug":"extra-bends-on-gsc-avep2s","status":"publish","type":"post","link":"https:\/\/lushprojects.com\/blog\/2010\/03\/extra-bends-on-gsc-avep2s\/","title":{"rendered":"Extra bends on GSC AVEP2S"},"content":{"rendered":"<p>The circuit-bent <a href=\"http:\/\/www.lushprojects.com\/videobend\/#gscavep2s\">AVEP2S<\/a> is still my favourite video tool. I was looking at some other video circuit benders work and liked a lot of stuff they were doing with chroma keys and control of saturation in an image. This inspired me to go back to the AVEP2S and add a few other nice features.<\/p>\n<p>The first project was to add some simple chroma key functions. The signals that were easily available to do this are the PAL colour components &#8220;(R-Y)&#8221; and &#8220;(B-Y)&#8221; so they aren&#8217;t real chroma keys because there is a big component of luminance in them too. Still they help slice up the image. The keying circuit is built from a uA733 video amp (from the arc) to boost the signals feeding in to a comparator. I found the 733 amp really hard to work with &#8211; it seems very sensitive to DC biasing and impedance on the output. Any advice from readers on how to make effective use of this IC is welcome.<\/p>\n<p>The other mod was to provide an input that can override the manual colour saturation control so that output can be varied dynamically.<\/p>\n<div id=\"attachment_134\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/lushprojects.com\/blog\/wp-content\/uploads\/modifiedchromakey.JPG\"><img aria-describedby=\"caption-attachment-134\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/lushprojects.com\/blog\/wp-content\/uploads\/modifiedchromakey-300x225.jpg\" alt=\"Squeezing the Chroma Key Controls On The AVEP2S Case\" title=\"Chroma Key Controls\" width=\"300\" height=\"225\" class=\"size-medium wp-image-134\" srcset=\"https:\/\/lushprojects.com\/blog\/wp-content\/uploads\/modifiedchromakey-300x225.jpg 300w, https:\/\/lushprojects.com\/blog\/wp-content\/uploads\/modifiedchromakey-1024x768.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-134\" class=\"wp-caption-text\">Squeezing the Chroma Key Controls On The AVEP2S Case<\/p><\/div>\n<p>With the additional keys you can get some really nice effects &#8211; particularly as you can modulate the key with an audio signal.<\/p>\n<div id=\"attachment_135\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/lushprojects.com\/blog\/wp-content\/uploads\/chromakeyimage.jpg\"><img aria-describedby=\"caption-attachment-135\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/lushprojects.com\/blog\/wp-content\/uploads\/chromakeyimage-300x217.jpg\" alt=\"Screen Capture with Aditional Chroma Key\" title=\"Screen Capture with Aditional Chroma Key\" width=\"300\" height=\"217\" class=\"size-medium wp-image-135\" srcset=\"https:\/\/lushprojects.com\/blog\/wp-content\/uploads\/chromakeyimage-300x217.jpg 300w, https:\/\/lushprojects.com\/blog\/wp-content\/uploads\/chromakeyimage-1024x742.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-135\" class=\"wp-caption-text\">Screen Capture with Aditional Chroma Key<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The circuit-bent AVEP2S is still my favourite video tool. I was looking at some other video circuit benders work and liked a lot of stuff they were doing with chroma keys and control of saturation in an image. This inspired me to go back to the AVEP2S and add a few other nice features. The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"_links":{"self":[{"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts\/133"}],"collection":[{"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/comments?post=133"}],"version-history":[{"count":3,"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts\/133\/revisions"}],"predecessor-version":[{"id":138,"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts\/133\/revisions\/138"}],"wp:attachment":[{"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/media?parent=133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/categories?post=133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/tags?post=133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}