Boss MO2 Multi Overtone Harmonizer EnhancerThe Boss MO 2 Multi Overtone is a hard pedal to catagorize, but it does a lot of very cool things. Works well with clean or distorted tones and uses the natural harmonics to create a bnch of different effects from mutli string type sounds to some pretty outside detuned effects. It's a fun tool to have around. Next generation BOSS compact pedal with innovative Multi Dimensional Processing, realized with proprietary technology and custom DSP Impressive,