REVERB PEDAL This reverb pedal uses DSP chips with modified algorithms, with 5 reverb effects and Decay control so you can experience everything you want. With the Shimmer control you will add brightness to the reverb and improve the modulation. With the Octaver button you will add another octave to the 5 Shimmer effects. Reverbs: Room, Hall, Church, Plate and Spring. Control Trail to switch from Buffer Bypass to True Bypass.