The first multi-effect pedal from Electro-Harmonix! The EHX Holy Stain is comprised of two stages: an analog distortion and a DSP. Two types of distortion are available: Fuzz and Drive. There are four DSP functions: Room Reverb, Hall Reverb, Pitch Shift and Tremolo. You can choose from one distortion mode and one DSP mode at a time or bypass either stage.