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"Rare Buchla Original Frequency Quad Voltage-Controlled Envelope Generator Model 284.
Historical Vintage Series 200 Synth System.
Dimensions approx. 8.5" x 7" x 3"
Adds voltage control and variable delay and duration times to the capabilities of the Model 280 (Four independent envelope generators with variable attack and decay times (range is .001 to 10 seconds) and a choice of sustained or transient operation. Input pulses initiate envelopes and optionally control duration time; output pulses, activated at end of decay, are particularly useful for advancing sequencers or looping to inputs to generate repetitive functions.).
All times are internally variable from .002 to 10 seconds; control voltages may be used to extend this range and control overall time while preserving envelope shape. http://www.buchla.com/historical/b200/284-vcenvgenerator.html"
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