Check the listing for details. Behringer 1033 Dual Envelope Generator Module Analog Envelope Generator Module. Condition: New. Listed at 52.90 USD. Vintage All-analog Dual Envelope Generator with Gate Delay The Behringer 1033 Dual Envelope Generator re-creates the authentic analog circuit topology of a legendary 1970s modular synth module, delivering vintage synth tones that evoke the sound of Tangerine Dream, Vangelis, Giorgio Moroder, and other electronic music pioneers. Like the Behringer 1003 Envelope Generator, the 1033 boasts a familiar four-section ADSR layout, with the release knob bearing the period-correct label “Final Decay Time.” But the 1003 adds a gate delay to each of the envelopes, a useful feature for offsetting the envelopes’ cycle start times for expanded soundshaping potential. The 1033 features six patch points: gate and trigger inputs and four signal outputs, including two inverted outputs for added flexibility.