The ModTone MT-DD Deep Dive Octave Plus is a true bypass boutique style pedal that delivers cool sub harmonic effects that are best utilized in single note or lead guitar applications. Using High Filter, Bass Filter and Sub Level together can create just a touch of “octave below” or when maxed out can cross over into some truly insane (almost bass guitar) frequencies! Flip the Modulate switch for the added bonus of a ring modulator style effect and listen to your lead lines take on an almost synth like quality.