BOSS XS-100 Poly Shifter | Advanced Pitch Shifting Workstation | Class-Leading Sound | Total Pitch Control for Guitar/Bass Across 8 Octaves | Onboard Pedal & Display | 30 Memories for Saving Setups Advanced pitch-shifting workstation with deep control options and an eight-octave range Class-leading pitch shifting quality realized with new BOSS algorithms, clear response and natural feel that retains the fundamental sound character Smooth onboard pedal with integrated toe switch provides linear pitch control across +/- four octaves Fixed pitch settings in semitone steps across eight octaves for drop tunings, capo effects, and otherworldly tones Detune function (+/- 50 cents) to create rich doubling effects Adjustable pedal curve and response Fully customizable toe switch and footswitches for momentary pitch changes, instant retuning, and more