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Early History of Computer-Controlled Sound Systems...How Did It All Begin?

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The paper reviews the early uses of microprocessors to control signal routing, input selection, and zone selection in building paging systems; and the early uses of computers with video displays to control signal-delay selection, loudspeaker selection and levels, signal routing, and power amplifier monitoring in sound-reinforcement systems for arenas, stadiums, and convention centers.

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AES - Audio Engineering Society