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Audio Visual Laboratories (AVL) was based in Phoenix Arizona, USA and produced probably the most commonly used audio-visual control systems used during the 1980's. They certainly dominated the North American and European markets.
Primarily a microprocessor based control system to control multiple 35mm carousel slide projectors for exhibition and conference use. This was the technique used before the advent of Microsoft Windows or the Apple Macintosh (and hence-forth MS PowerPoint and other presentation software) to present visual information to small and large audiences at conferences and product launches.
The AVL control systems developed from the late 1970's from solid-state controls with lots of buttons, through to PC-M based desktop computers (the Eagle) through to the IBM-PC based Genesis running MS-DOS. Code was typed into a command line style prompt that generated an audio signal from the special on-board card that sent a signal to a controller known as a Dove that in turn controlled three carousel slide projectors. Up to ten Doves could be connected to one computer, thus a maximum of thirty slide projectors could the independently controlled - dissolving the lamp up and down at a variety of rates and stepping the projector forwards, backwards, or not at all.
was all this done?
AVL and ebay
23 May, 2006
© Nigel Sadler 1995-2008
email: nigel at herriott-sadler dot co dot uk