Roland System-500 Series - 540 Dual Envelope and LFO - Eurorack Module

The System-500 Series - 540 from Roland is a dual voltage-controlled envelope and a single low-frequency oscillator (LFO) in a single Eurorack module. Each independent envelope offers parameter slider for attack, decay, sustain, and release (ADSR) and includes two standard outputs and one inverse output. Additionally, the envelopes have a manual-trigger switch, a fast/slow envelope-speed switch, and a gate-trigger switch that selects whether the envelope is triggered externally/manually or cycles, which creates a self-cycle based on attack and decay settings.