In both MKI and MKII form, the 3Leaf Audio Octabvre pedal gives you the sound of the classic OC-2, gritty 808, and the Mutron Octave all in one pedal. This dual-mode octaver gives you harmonically rich sub octaves with the option to click on a second footswitch that will solo your sub octave sound. The MKII sports an added toggle switch to choose between the pedal's original voicing and the popular "Tim tuning," a sound based off of the mods bassist Tim Lefebvre did to his own Octabvre.