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CGS78 Envelope Generator- Problems with Decay and Sustain stages

2013-09-28 by piano392003

Wonder if anybody can help with this issue. I built the CGS78, using 1Megohm pots for the attack, decay and release controls. Using ±12V Power supply. Attack and release functions work fine. Sustain control has no effect on output level voltage (Output stays at about 10.6 volts with trigger present). Decay control has no effect whatsoever. Tried doubling C Capacitor from 1uF to 2uF with no change in performance.
Any suggestions?

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