Dual ADSR

View the Schematic.

More pictures of the module.

ADSR front panel ADSR from the back
A view of the front panel. Knobs top-to-bottom are (obviously) Attack, Decay, Sustain, and Release. The switches scale the envelope element times to "short" or "long". Short is about 1 second max for A, D, and R. Long is about 10 seconds max. Minimum attack times are about 0.25 milliseconds for short and 2.5 milliseconds for long. The banana jacks are for gate in and envelope out.

A view from the back.