Dual ADSR Envelope Generator

Intellijel Dual ADSR

The circuit inside Intellijel’s Dual ADSR module is partially based on that of the Roland SH-101/System 100m (hence the sliders), but with a couple of modifications. Each of the module’s channels features three timing ranges (1 second, 10 seconds, and a 1 minute AD loop), an EOD output, manual Gate buttons, and both normal and inverted envelope outputs. There is also a retrig input on each channel that will re-trigger the envelope whenever the gate at the input is high enough.

Dual ADSR Features

• Manual GATE buttons
• Three timing ranges: (1 second, 10second, 1minute A/D times)
• Normal and inverted outputs
• End of Decay (EOD) logic output
• Cycle mode (which GATE logic control)
• Retrig input (allows re-triggering of the envelope if source gate held high)
• Dynamic control of the envelope output level (each ADSR is routed through a linear VCA and the control is normalled to +5V via the LEVEL jack. You can patch another control source like an LFO or VELOCITY level from a keyboard to this jack.