The Holy Grail is Digital Reverb in a compact guitar pedal. It contains three different reverb algorithms: SPRING, HALL, and FLERB. All three algorithms were designed and tailored for the electric guitar but they will work equally as well on most instruments and voices. The SPRING algorithm is a recreation of the classic spring reverbs that are found in many guitar amplifiers. The HALL algorithm is a new, lush reverb. Finally FLERB is a beautiful reverb like nothing you have heard before and may help you play your instruments in new ways.