dbx Model 700 Digital Audio Processor

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The dbx Model 700 Digital Audio Processor was a professional audio <a href="/facts/Analog-to-digital_converter/8YYNsMFg">ADC</a>/<a href="/facts/Digital-to-analog_converter/5loEvAeb">DAC</a> combination unit, which digitized a <a href="/facts/Stereophonic_sound/z0vmJcGT">stereo</a> <a href="/facts/Analog_signal/xDbb4uB5">analog</a> audio input into a bitstream, which was then encoded and encapsulated in an analog <a href="/facts/Composite_video/FIsE6mBz">composite video</a> signal, for recording to tape using a <a href="/facts/Video_cassette_recorder/vNXMylt5">VCR</a> as a <a href="/facts/Transport_(recording)/pUglSc5T">transport</a>. Unlike other similar pieces of equipment like the <a href="/facts/PCM_adaptor/EssCjleP">Sony PCM-F1</a>, the Model 700 used a technique called <i>Companded Predictive <a href="/facts/Delta-sigma_modulation/QrhBCoUe">Delta Modulation</a>,</i> rather than the now-common <a href="/facts/Pulse-code_modulation/5gdfjtH3">pulse-code modulation</a>. At the time of its introduction in the mid-1980s the device was the first commercial product to use this method, although it had been proposed in the 1960s and prototyped in the late '70s.
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dbx Model 700 Digital Audio Processor open-in-new

dbx Model 700 Digital Audio Processor