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.

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
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
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

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 M

Nominal output level
- -20 dBu

Maximum output Level
- +7 dBu

Output impedance
- 1 k

Recommended load impedance
- 10 k 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

Dimensions
- 73 x 129 x 59 mm (2-7/8 x 5-1/8 x 2-3/8")

Weight (including battery)
- 410 g (15 oz)