The Behringer 140 Dual Envelope/LFO is an analog Eurorack module that recreates the classic dual envelope/LFO circuit design of the System 100 / 100M. It combines two independent ADSR envelope generators (two normal outputs + one inverted), a multi-waveform LFO (sine, triangle, square, ramp, sawtooth) with two outputs, external sync and trigger inputs, a manual trigger button, and a set of front panel controls for immediate performance. It can be used for harmonic filter/modulation, synchronized/split LFO modulation, and keyboard phase locking behavior.

The module is designed for Eurorack systems (±12 V).