BOSS - XS-1 | Poly Shifter

Rapid Retuning, Flawless Sound

The XS-1 Poly Shifter delivers instant retuning in a convenient, compact footprint. Driven by advanced BOSS algorithms years in the making, this magical pedal transforms the overall pitch while maintaining your instrument’s true character. You get speedy tracking, crystal-clear response, and zero compromise in tone—whether shifting down, simulating a capo, or using extreme octave jumps for effect. The versatile XS-1 unlocks a new level of performance freedom, making tuning changes fast, fluid, and seamless.

Features

Class-leading pitch shifting quality realized with new BOSS algorithms
Instantly change the pitch of a guitar, bass, or other instrument
Clear response and natural feel that retains the fundamental sound character
Change pitch across +/- seven semitones or +/- three octaves
Balance knob adjusts the mix between the effect and direct sound
Detune function (+/- 20 cents) to create rich doubling effects
Selectable pedal switch modes for toggle or momentary operation
Connect external footswitches for quick access to up to three tuning setups, or use an expression pedal for linear pitch control
BOSS five-year warranty

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-1 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.

Redefining Pitch Shifting for Live Performance

Retuning during a performance means long pauses, instrument swaps, or pedal solutions that can color the sound in undesirable ways. With the XS-1, you can shift tunings on demand and retain great sound, feel, and response—without ever breaking the momentum of a show. Authentically play songs in drop tunings, change keys to suit a vocalist’s range, create unique extended-range sounds, and more.

Wide Range, Simple Controls

Offering a range of +/- seven semitones and three octaves up or down, the XS-1 adapts to virtually any musical need. Thanks to the signature BOSS compact interface, dialing in sounds is fast and intuitive. With semitone tunings, you’ll usually want to set the Balance knob for effect only to avoid pitch conflicts. For octave shifts, use it to blend in the direct sound for 12-string effects, parallel guitar/bass sounds, and unexplored colors. There’s also a Detune mode to create evocative doubling effects with high-definition tone.

Supreme Creative Command

The XS-1 provides a variety of control options to meet your creative intent. With the flip of a panel control, you can assign the pedal switch for standard on/off toggle use or momentary operation. Connect up to two external footswitches for fast access to alternate tuning modes with your preferred Balance settings. Or add an expression pedal to transform the XS-1 into a dynamic pitch-bending tool for dramatic, ear-turning shifts.

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
Nominal Input Level: -20 dBu
Maximum Input Level: +7 dBu
Input Impedance: 1 MΩ
Nominal Output Level: -20 dBu
Maximum Output Level: +7 dBu
Output Impedance: 1 kΩ
Recommended Load Impedance: 10 kΩ or greater
Bypass: Buffered bypass
Controls: BALANCE knob
SHIFT knob
PEDAL MODE switch
SHIFT DIRECTION switch
Pedal switch
Indicator: CHECK indicator (Used for check battery)
Connectors: INPUT jack: 1/4-inch phone type
OUTPUT jack: 1/4-inch phone type
CTL/EXP jack: 1/4-inch TRS phone type
DC IN jack
Power Supply: AC adaptor
Alkaline battery (6LR61 or 6LF22, commercially available) x 1
Current Draw: 120 mA
Expected battery life under continuous use: Alkaline battery (6LR61): Approximately 3 hours
* This can vary depending on the specifications of the batteries, capacity of the batteries, and the conditions of use.
Accessories: Leaflet (“USING THE UNIT SAFELY”, “IMPORTANT NOTES” and “Information”)
Alkaline battery (9 V, 6LR61 or 6LF22)
Options (sold separately): AC adaptor: PSA series
Footswitch: FS-5U
Dual footswitch: FS-6, FS-7
Expression Pedal: EV-30, FV-500L, FV-500H, Roland EV-5
Size and Weight
Width: 73 mm
2-7/8 inches
Depth: 129 mm
5-1/8 inches
Height: 59 mm
2-3/8 inches
Weight (including battery): 410 g
15 oz
* 0 dBu = 0.775 Vrms
*The specifications are subject to change without notice.

Downloads

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.