BOSS XS-100 Poly Shifter – Advanced Polyphonic Pitch-Shifting Pedal

OVERVIEW

The BOSS XS-100 builds on the foundation of its smaller sibling (XS-1), but adds serious horsepower for musicians who want deeper control and expanded performance features. It retains clean, ultra-low latency pitch-shifting across chords and fast lines, while pushing the range to ±4 octaves. The built-in expression pedal (with assignable toe-switch) makes dynamic pitch bends, sweeps or wet/dry blending feel natural and hands-on, especially in live or experimental settings.

Beyond its creative expression tools, the XS-100 gives rig-builders serious utility: 30 onboard presets, USB-C for firmware updates, full MIDI I/O, analog dry-through, and external switch/expression inputs. Whether you’re dialing in obscure tunings, doing octave jumps in performance, or layering harmonies in studio, the XS-100 is designed to let you shape pitch effects in ways other pedals simply can’t match.

KEY HIGHLIGHTS

Massive Pitch Range:

Go beyond one octave – shift up or down by four octaves, enabling extreme leaps or subtle harmonies.

Expression Pedal Onboard:

Built-in expression control with assignable toe-switch makes pitch bends and real-time control fluid and expressive.

30 Presets + MIDI & USB-C:

Store and recall your settings easily; connect with MIDI or USB-C for deeper integration or firmware updates.

Analog Dry-Through & External Control:

Keep your dry signal intact and get hands-free control via external footswitches or expression pedals for flexibility on stage or in the studio.

Polyphonic Algorithm & Low Latency:

Tracks cleanly across chords and fast playing – even with big pitch shifts – so you maintain clarity and feel.

FEATURES

• Four-octave shift range (up/down)
• Built-in expression pedal with toe-switch for real-time pitch control
• 30 memory presets stored onboard
• Dry/wet balance & effect curve customization
• MIDI I/O for remote control & synchronization
• USB-C for firmware updates
• Analog dry-through to preserve the original signal path
• External footswitch or expression pedal inputs
• Rugged enclosure designed for performance settings
• Optimized algorithm for polyphonic tracking and chord clarity
• BOSS five-year warranty.

TECHNICAL SPECS

Format: BOSS compact pedal

Polyphonic Pitch-Shifting Algorithm: New polyphonic design optimized for clean chord tracking

Pitch Range: ±4 octaves up/down

Presets: 30 user-storeable patches

Controls:

• Onboard expression pedal
• Preset access
• Parameter editing
  • Tuning
  • Pitch bend
  • Effect curves

Connectivity Options:

• MIDI In/Out
• USB-C (for firmware/updates)
• External switch/expression input

Signal Path: Wet/dry balance with analog dry-through

Suitable for Guitar and Bass – handles low end very well