Check the listing for details. Waldorf mod1 Modulator Module for Eurorack. Condition: New. Listed at 399.99 USD. Overview The mod1 Modulator Module for Eurorack from Waldorf is an analog envelope generator that produces time-based modulation signals used to control various types of modules in your Eurorack synthesizer. This unit houses three flexible modulation sources capable of producing simple envelopes and LFOs, as well as complex looped and multi-stage curves. The ADSR section features a decay parameter configurable for one, two and three stages, three sustain modes, and a switchable loop mode. It outputs both positive and inverted signals. The symmetry generator can be used as an LFO with a choice of square and linear waveforms. Symmetry and speed can be controlled from the panel or via CV inputs. The rise & fall generator is a two-stage envelope generator that features a curve control for the rise stage and an optional loop mode. Key Features Three Modulation Sources in One Module Analog Circuitry ADSR Generator with Three Decay Stages Symmetry Generator with LFO Mode Rise & Fall Generator Optional Loop Modes Three Sustain Modes Positive and Inverted Signal Outputs For Eurorack Format In the Box Waldorf mod1 Modulator Module for Eurorack - WDFMOD1 1-Year Limited Warranty