Envelope

ADSR with a very wide range of speeds and looping mode

The 6HP wide Oakley Envelope is an easy to use four stage envelope generator with switchable looping mode.

The ADSR is operated by a traditional gate signal, but can also be triggered by slow rising CVs too due to the built in Schmitt trigger function. No additional 'trig' input is required.

Although the panel does not imply a voltage controlled design, the internal electronics uses a voltage controlled slew generator at its core. This allows very fast minimum attack and decay times. And yet, the controls with their true exponential response, allow you to accurately adjust faster times with ease.

Two LEDs are provided. One gives a visual indication of the output level of the internal ADSR waveform, and the other shows the status of the gate input lighting up when either an active gate signal is present or the unit is in looping mode.

Loop Modes
The Oakley Envelope incorporates a looping mode. Looping means that the output will rise to the attack peak at the speed determined by the attack pot and then fall to 0.5V at the speed determined by the Decay pot. It will then rise again to the attack peak and then fall back to 0.5V and so on.

NORM - the module behaves as a standard ADSR.

GATED - the output will loop only when gate is high. As soon as gate arrives the output will rise up at the attack speed and then decay at the decay time and repeat. If the gate is removed at any point the output will then fall at the release time.

LOOP - The module's output will loop continuously in AD mode. The Gate input has no effect in Loop mode.

In both looping modes the position of the sustain pot can be used to turn the looping on or off. At values above 10% the looping will stop.

Specifications:
Attack times: 0.18 milliseconds to 25 seconds (fast) or 1.4 ms to 200 seconds (slow). Charging voltage +10V, internal attack peak +5V. Pseudo linear ramp.

Decay/Release times: 0.35 milliseconds to 30 s (fast) or 2.8 ms to 240 seconds (slow). Time measured from 90% of sustain value to 10% of sustain value. Exponential decay slope.

Sustain levels: 0.0V to 5.0V

www.oakleysound.com/ADSR-e.htm