The EHX Mod Rex is a kinetic tour-de-force that lets you weave compelling, shifting, musical tapestries. Whether you are a guitarist, synthesist or electronic musician you will find it inspires your creativity and stretches your musical boundaries. The heart of the pedal are its four, independent modulation sections synced in time, they are: 1. MOD features great sounding EHX Vibrato, Flanger, Chorus or Phaser.