Looping ADSR Envelope Generator Desktop Modular Synthesizer Pedal

Imagine taking a classic ADSR envelope and giving it the power to loop endlessly, turning it into a rhythmic LFO right on your desk. This little box from Hungry Robot does just that, bridging the gap between modular synth patching and pedalboard simplicity with its analog heart.

At its core, it's a fully analog envelope generator with knobs for Attack, Decay, Sustain (up to 10 seconds on Release), and a unique Loop Scale that shrinks the entire ADR cycle while preserving ratios—perfect for dialing in tight, musical pulses. Switches let you flip between linear and exponential curves, Loop/ADSR modes, and in Loop mode, Repeat (free-running) or Gate (triggered start). Every knob has its own CV input for dynamic control, plus Gate/Trigger In and a 3.5mm Envelope Out, all running internally on Eurorack-level +/-12V but powered by standard 9V DC negative center guitar adapters. Measuring a compact 4.7 x 3.7 x 1.96 inches, it patches seamlessly with other modules or CV-friendly pedals.

Players love how it injects organic motion into rigs without needing a full Eurorack case—folks highlight the intuitive looping for instant basslines or modulations, though some wish for even longer times on slower settings.