The Ring Thing Single Sideband Modulator Pedal from Electro-Harmonix features pitch shifting, preset tuning, selectable waveforms and expression pedal control. The Ring Thing has four selectable modes that utilize either frequency or pitch shift modulation: Ring Modulation, Single Sideband - Upper Band, Single Sideband - Lower Band and Pitch Shift. The Single-sideband modulation is an effect based on Ring Modulation but where only one band is present, making it a more harmonious effect. The modulable pitch shifter can do detune effects, vibrato, chorus, transpose or even whammy when you use an external expression pedal.