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STUDIO THE EVOLUTION OF VISION MIXERS by Liam Laminman, Managing Director, Trickbox TV A t the heart of any multi-camera production is a vision mixer – or ‘production switcher’ as some people call them. Its core role is the switching of different sources, primarily cameras, often VTs and sometimes incoming external sources such as remote feeds from broadcasters. Even for non-TV types, that’s relatively simple enough to get your head round – several different incoming video signals can be switched from one to the next. Vision mixers come into their own when you look at their secondary features of keying graphics, transitions and digital effects. 58 | KITPLUS - THE TV-BAY MAGAZINE: ISSUE 104 AUGUST 2015