Confluence of Ideas of Electronics and Arts
Many principles used in the construction of early video synthesizers reflected a healthy and dynamic interplay between electronic requirements and traditional interpretations of artistic forms. For example, Rutt & Etra and Sandin carried forward as an essential principle ideas of Robert Moog that standardized signal ranges so that any module's output could be connected to "voltage control" any other module's input. The consequence of this in a machine like the Rutt-Etra was that position, brightness, and color were completely interchangeable and could be used to modulate each other during the processing that led to the final image. Videotapes by Louise and Bill Etra and Steina and Woody Vasulka dramatized this new class of effects. This led to various interpretations of the multi-modal synthesesia of these aspects of the image in dialogues that extended the McLuhanesque language of film criticism of the time.
In the UK Richard Monkhouse working for EMS developed a hybrid video synthesiser – Spectre – later renamed 'Spectron' which used the EMS patchboard system to allow completely flexible connections between module inputs and outputs. The video signals were digital, but they were controlled by analog voltages. There was a digital patchboard for image composition and an analog patchboard for motion control.
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