The BOSS XS-1 Poly Shifter packs cutting-edge performance into a compact pedal. Powered by advanced polyphonic pitch-shifting technology built on decades of expertise, the XS-1 is crafted for musicians who demand precision, flexibility, and ease of use.
From faultless octave jumps to subtle detuning, players can perform head-turning pitch effects while preserving their instrument’s natural feel and tone. Designed for effortless creative exploration, this versatile stompbox delivers instant capo functionality, drop tunings for heavy riffs, dramatic tonal shifts, and much more.
WHO’S IT FOR?
Gigging guitarists and bassists who need quick access to different tunings without the hassle of using several instruments. Ideal for players looking to instantly re-pitch their guitars, craft heavy drop-tuned riffs, and explore new creative possibilities.
KEY BENEFITS
1 PITCH PERFECTION FEATURES
- Instant retuning capability without pausing your creativity
- Brand-new algorithm leverages ultra-fast attack, preserving clarity, technique, and instrument character
- Polyphonic pitching delivers stunning, glitch-free performance, even when playing full chords or fast melodic lines
- Since it’s a natural-sounding pitch shifter, it pairs well with other effects
- Fully supports bass frequencies
- Durable design ensures stable operation for gigging
RETUNE YOUR GUITAR/BASS
- Natural pitch shifting with in a range of six octaves (three up to three down)
- Shift knob allows users to quickly select between 1-7 semitone or 1-3 octave intervals
- Detune mode adds depth and richness to your tones like doubling effect
- Shift Up function delivers convenient capo-style operation for changing key in a song or for tapping style performance
- Emulate bass instruments on guitar by shifting down one octave
- Craft harmonized solos and effects using semitone shifts
Simplicity and Ease of Use
- The Balance knob allows quick, easy adjustment between the wet and dry signals
- The Shift knob provides effortless control over the pitch shift amount
- The Shift switch toggles the pitch between up, down, or slightly detuned (±20 cents)
- The Toggle/Moment switch selects between latching the effect on/off or activating it only while the onboard footswitch is pressed
- External footswitches allow to control over two different settings, so that you can control three different tunings in total
- Expression pedal allows to control the pitch shift in real- time like dynamic pitch bending effect

WITTNER METRONOME BLACK 845161
GRAPH TECH STRING SAVER ORIGINAL F-OFFSET STYLE BARREL SADDLES
ELECTRO HARMONIX WAILER WAH-WAH PEDAL
VIC FIRTH 5AN AMERICAN CLASSIC NYLON TIP
FENDER PRO JUNIOR III
MEINL SONIC ENERGY 10-INCH CRYSTAL SINGING BOWL 432HZ HEART CHAKRA
DADDARIO ACCESSORIES PWCT17GN ECLIPSE TUNER GREEN
ELECTRO HARMONIX STEREO ELECTRIC MISTRESS
DUNLOP KH95 KIRK HAMMET WAH
DUNLOP CRYBABY 535Q MULTI WAH PEDAL CHROME
STAGG BX-DELAY MINI STOMP BOX
FENDER BASSBREAKER 007 COMBO
VIC FIRTH 55A WOOD TIP
MOOER MICRO PREAMP DAY TRIPPER
VIC FIRTH 1A AMERICAN CLASSIC WOOD TIP
EVANS 24 EQ3 RESONANT BLACK
STAGG KG443 CHROME BASS TUNERS
MEINL NINO551 TRIANGLE
MEINL SONIC ENERGY 8-INCH CRYSTAL SINGING BOWL OM 432HZ
YAMAHA RYDEEN STUDIO BURGUNDY GLITTER WITH CYMBALS
AKG D7
BOSS AW3 WAH WAH PEDAL
DUNLOP CRY BABY MINI 535Q WAH GUITAR EFFECTS PEDAL
EPIPHONE CASINO HOLLOWBODY ELECTRIC GUITAR NATURAL
VIC FIRTH AJ3 AMERICAN JAZZ
YAMAHA CG 182S CLASSICAL GUITAR NATURAL SPRUCE SOLID WOOD
DUNLOP JH 1D JIMI HENDERIX WAH PEDAL
MOOER RADAR SPEAKER CABINET SIMULATOR
DUNLOP DD95FW CRY BABY DAREDEVIL FUZZ WAH
MOOER DUAL-CHANNEL DIGITAL PREAMP X2
K&M STACKER FOR 18950
DUNLOP DB01B DIMEBAG CRY BABY FROM HELL WAH PEDAL
YAMAHA CG 122MS CLASSICAL GUITAR NATURAL MATTE SPRUCE
MEINL SPECIAL ENGRAVED SINGING BOWLS 600G
YAMAHA CG 162C CLASSICAL GUITAR NATURAL CEDAR SOLID WOOD
MXR M222 TALKBOX
VOX V847 WAH PEDAL
FENDER TRE-VERB DIGITAL REVERB/TREMOLO
ERNIE BALL TAP TEMPO PEDAL
TAMA IRON COBRA 600 DUO GLIDE SINGLE BASS DRUM PEDAL
TAMA HP 910LWN DOUBLE SPEED COBRA
LINE6 DL4MKII DELAY MODELER
DEATH BY AUDIO MICRO DREAM
TAMA HS80W ROADPRO SNARE STAND
VOX V846-HW WAH WAH PEDAL HANDWIRED TRUE BYPASS
FENDER AMERICAN VINTAGE STRATOCASTER®-TELECASTER® TUNING MACHINES
MEINL SONIC ENERGY SOLFEGGIO CRYSTAL SINGING BOWL 8" C5/Mi/528Hz
BOSS GEB7 BASS GRAPHIC EQUALIZER
GROVER 102N ROTOMATIC GUITAR MACHINE 3+3 NICKEL
BOSS VO1 VOCODER
STAGG 18x10 MARCHING BASSDRUM WHITE
YAMAHA YFL-372 FLUTE
MXR M80 BASS DI+
EVANS 13 GENERA G1 COATED TOM HEAD
STAGG SWH PB45 TOP WHITE VINYL
YAMAHA HS1200
VIC FIRTH 3AN AMERICAN CLASSIC NYLON TIP
YAMAHA CG 182C CLASSICAL GUITAR NATURAL CEDAR SOLID WOOD
ELECTRO HARMONIX BASS MONO SYNTH
MOOER THE WAHTER WAH PEDAL
MEINL SONIC ENERGY SOLFEGGIO CRYSTAL SINGING BOWL 10" B4/963 Hz
MEINL SONIC ENERGY SOLFEGGIO CRYSTAL SINGING BOWL 10" F#4/Sol/741 Hz
DUNLOP CRYBABY CLASSIC GCB95F
MEINL SONIC ENERGY UNIVERSAL SINGING BOWL - 400G
DUNLOP CRYBABY BASS MINI WAH
MEINL SONIC ENERGY SINGING BOWL 600G - UNIVERSAL SERIES
STAGG PHB-100 PICK HOLDER VARIOUS COLOURS
TAKAMINE DH-90 HIRADE CLASSIC
YAMAHA C70 CLASSICAL GUITAR NATURAL
FENDER MIRROR IMAGE DELAY PEDAL
VIC FIRTH CMN CLASSIC METAL NYLON TIP
K&M 18860 SPIDER PRO BLACK
VIC FIRTH 7A HICKORY WOOD TIP
MEINL NINOSRS1L NINO RAINSTICK
IBANEZ AF75-TRS ARTCORE TRANSPARENT RED SUNBURST
VIC FIRTH AJ4 AMERICAN JAZZ
VIC FIRTH AJ6 AMERICAN JAZZ
VIC FIRTH AMERICAN CLASSIC 5B WOOD TIP
DW 3500A HIHAT STAND DWCP3500A
PEARL H830 HIHAT STAND
YAMAHA FP 9C FOOT PEDAL
FENDER TREAD-LIGHT WAH PEDAL
SUPRO 1612RT AMULET 1 X 10 TUBE COMBO AMP
VIC FIRTH AMERICAN CLASSIC HICKORY 7AN NYLON TIP
FENDER MTG TUBE TREMOLO 