For sale here is a used 3Leaf Audio Octabvre sub octave pedal for guitar or bass, in excellent condition. This pedal is essentially a fusion of two classic octavers: the Boss OC-2 and the Mutron (the two circuits are blendable with the tone knob). You can blend between the clean signal and the sub octave with the blend knob, or you can solo the sub octave for low, synth-y bass lines. Best sounding octaver I've ever heard. Only selling because I'm moving to a digital rig for convenience.