XILS 4XILS 4 by XILS Lab is a virtual analog modular synthesizer plug in that emulates a prototype EMS VCS4 synthesizer, which was based on two integrated interlinked, and interacting VCS 3 (Synthi) cores. These cores are coupled with a 256 analog polysequencer as well as a collection of envelopes, LFOs, S&H, a Voltage Processor, a pitch tracker, transient control, an analog chorus with three modes, a delay, a phaser, a spring reverb, and more. The modular