XS-100Poly Shifter

XS-100

Unrivaled Dynamic Pitch Expression

The XS-100 Poly Shifter redefines pedal-based pitch shifting with groundbreaking BOSS technology years in the making. Delivering natural sound, precision tracking, and deep customization options, this powerhouse expression machine transforms how you perform with pitch. Glide up or down four full octaves with the ultra-smooth pedal to infuse your music with evocative new colors. Enhance solos by triggering bold shifts with a single footswitch press. Instantly retune your instrument with drop tunings, capo simulations, and more. And with onboard memories, your favorite setups are always ready when you need them.

Introduction Movie

Standard Features

  • Advanced pitch-shifting workstation with deep control options and an eight-octave range
  • Total pitch control for guitar and bass
  • 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
  • Clear display for editing sounds and 30 memories for storing favorite setups
  • Dedicated analog output that mirrors the input signal
  • Connect up to two footswitches or an expression pedal for extended control
  • TRS MIDI I/O for external control and sending MIDI commands with the pedal and footswitches
  • USB connector for system updates

Natural Sound with Advanced BOSS Technology

In developing the XS series, BOSS engineers pioneered new methods to advance real-time pitch shifting and eliminate the tonal artifacts common in conventional designs. Powered by finely tuned algorithms and a specially selected DSP platform, the XS-100 provides balanced polyphonic performance that feels natural and musical across all playing styles, pickup positions, and pedal setups. Your instrument’s attack and tonal character are fully preserved, and even complex chords and sustained lead tones—typically a challenge for pitch shifters—are reproduced with stunning clarity.

XS-100

Total Pitch Control

With the XS-100 underfoot, you’re in full command of nearly any pitch effect imaginable. The responsive pedal offers linear control of four octaves up or down, and independent pitch-change speeds for each pedal direction make it easy to produce motor revving tones and other interesting effects. At the end of the pedal’s travel, you can use the integrated toe switch to introduce momentary pitch jumps with adjustable range and rise/fall time. Two footswitches are also available to bypass the pedal shift and quickly retune your instrument at fixed semitone steps across eight octaves.

XS-100

Customize and Save

The XS-100 gives you the tools to shape pitch effects with precision and personality. Customize the pedal’s range for different songs or techniques and fine-tune the response curve to suit your playing style. Freely reassign the toe switch and footswitches to alternate functions. Craft rich doubling effects with the detuning option and explore many other ways to refine your sound. Once everything’s dialed in, save your setup to one of 30 memories for instant recall during live sets or studio sessions.

XS-100

Integrate with Every Rig

Filled with flexible connectivity, the XS-100 flows with every performance setup. Up to two external footswitches or an expression pedal are supported, expanding your real-time control options. MIDI I/O opens the door to more advanced applications, from external MIDI control to sending MIDI commands with the pedal and footswitches. There’s also a secondary output that mirrors the input signal, providing parallel routing flexibility for sophisticated rigs.

XS-100

Specifications
AD Conversion
24 bits + AF method
AF method (Adaptive Focus method) This is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD and DA converters.
DA Conversion
32 bits
Sampling Frequency
48 kHz
Memories
30
Nominal Input Level
INPUT: -10 dBu
Maximum Input Level
INPUT: +7 dBu
Input Impedance
INPUT: 2.2 MΩ
Nominal Output Level
OUTPUT: -10 dBu
Maximum Output Level
OUTPUT: +7 dBu
Output Impedance
OUTPUT: 1 kΩ
Recommended Load Impedance
OUTPUT: 10 kΩ or greater
Bypass
Buffered bypass
Controls
EFFECT switch
TUNE DOWN switch
SELECT knob
EFFECT button
MEMORY button
EXP1 pedal
Display
Graphic LCD (64 x 32 dots, backlit LCD)
Connectors
INPUT jack: 1/4-inch phone type
THRU jack: 1/4-inch phone type
OUTPUT jacks: 1/4-inch phone type
CTL1, 2/EXP2 jack: 1/4-inch TRS phone type
USB port: USB Type-C®
MIDI (IN, OUT) connectors: Stereo miniature phone type
DC IN jack
Power Supply
AC adaptor
Current Draw
160 mA
Power consumption when in OFF mode (when the power automatically turns off)
0.1 W
Accessories
AC adaptor
Leaflet (“USING THE UNIT SAFELY”, “IMPORTANT NOTES” and “Information”)
Rubber foot x 4
Options (sold separately)
Footswitch: FS-5U
Dual footswitch: FS-6, FS-7
Expression Pedal: EV-30, FV-500L, FV-500H, Roland EV-5
MIDI/TRS connecting cable: BMIDI-5-35, BMIDI-1-35, BMIDI-2-35, BCC-1-3535, BCC-2-3535
Size and Weight
Width
147 mm
5-13/16 inches
Depth
230 mm
9-1/16 inches
Height
72 mm
2-7/8 inches
Maximum height
96 mm
3-13/16 inches
Weight
1.7kg
3 lbs 12 oz
* 0 dBu = 0.775 Vrms
*The specifications are subject to change without notice.
Flawless Feel, Sublime Sound, Perfect Precision: The XS Series Poly Shifters

Flawless Feel, Sublime Sound, Perfect Precision: The XS Series Poly Shifters

How BOSS mastered the three As of pitch shifting—Attack, Authenticity, Accuracy—with the XS-1 and XS-100, setting new industry standards.Read more…

An Introduction to Pitch Shifter Pedals

An Introduction to Pitch Shifter Pedals

Discover what pitch shifter pedals do, how they work, and why they’re essential tools for guitarists seeking new tones and creative freedom.Read more…

Shifting With the Times: The History of BOSS Pitch Pedals

Shifting With the Times: The History of BOSS Pitch Pedals

Explore decades of industry-leading BOSS pitch pedal innovation, from the classic OC-2 Octave to the advanced XS-1 and XS-100 Poly Shifters.Read more…

Five Creative Ways to Use a Pitch Shifter Pedal

Five Creative Ways to Use a Pitch Shifter Pedal

Watch inspiring demo videos and discover new techniques on how to transform your music-making with the BOSS OC-5, PS-6, XS-1, and XS-100.Read more…

How to Choose a Pitch Pedal

How to Choose a Pitch Pedal

A clear guide to the complete BOSS pitch range—learn how the XS-1, XS-100, OC-5, and PS-6 can reshape your sound and inspire new ideas.Read more…

Reverberations: Olly Steele

Reverberations: Olly Steele

The London-based guitarist walks us through his history, the power of the XS-100 Poly Shifter, and how he'd explain his style to his granny.Read more…

Support

If you have questions about operating your BOSS product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner's Manuals