Boss XS-100 Poly Shifter

A New Generation of Pitch Shifters from BOSS

The XS-100 continues the legacy of BOSS pitch effects but with a decidedly modern approach: this is no longer just a simple "harmonizer" or octaver, but a true transposition workstation. The goal is clear: to preserve your instrument's character while pushing the limits of pitch shifting, whether for practical needs (drop tuning, capo simulation) or radical textures like extreme pitch bending.

At the heart of the XS-100 are BOSS's latest-generation algorithms and a dedicated DSP platform, designed to reduce artifacts and preserve attack. The result: dense chords, powerful riffs, and sustained notes remain clear, making all the difference live and in the studio.

Who the XS-100 Is For and the Styles It Excels In

The BOSS XS-100 Poly Shifter targets demanding guitarists and bassists who want to change tuning without adjusting the machine heads, thicken a lead, create credible doubles, or control pitch as a full instrument. It is perfectly suited for musicians in modern rock, metal, prog, pop, worship, electro, sound design, as well as fans of ambient and cinematic textures.

On a pedalboard, it becomes a central tool: you can recall settings by memory for each song, keep a separate dry signal via the THRU output, and control everything with highly performance-oriented precision. In the studio, it opens up quick arrangement possibilities (octaves, detuned unisons, fixed transpositions) without re-recording parts.

Controls, Memories, and Integration: A Pedal Designed to Play, Not Just to Adjust

The XS-100 combines real-time control and advanced customization. The EXP1 expression pedal allows linear sliding over 4 octaves up or down, and the integrated toe switch can trigger momentary changes for punchy "kick" effects. The two footswitches (EFFECT and TUNE DOWN) provide direct access to functions, while editing and navigation are handled via the SELECT knob/encoder and the EFFECT and MEMORY buttons, with a backlit graphic LCD screen that facilitates work both in rehearsal and on stage.

The memory section is a real asset: 30 slots to save your transpositions, pedal behaviors, and speed/curve settings. On the connectivity side, everything is planned for a modern rig: USB-C for system updates, MIDI TRS in/out for control or automation, and a CTL1/2 or EXP2 input to add up to two external footswitches or a second expression pedal.

Sound Character

The XS-100's character stands out with a very "hi-fi" and controlled approach: the transposition is precise, stable, and transparent enough to keep your attack and tone front and center. Drop tuning and virtual capo sounds are designed to feel "played that way," without sounding like an effect slapped on top. The Detune function (up to 50 cents) adds immediate thickness, ideal for wide doubles, subtle chorused unisons, or thickening a riff without muddying the mix.

In pure expression, the pedal's range allows very musical rises and falls (controlled whammy type), as well as more extreme movements, with a sense of control that invites you to play pitch as a modulation in its own right. Among guitarists associated with the XS-100 universe is notably Olly Steele, appreciated for his modern textures and rhythmic precision.

Technical specifications

Effects	Octaver / Harmony	Use	electric guitar
Format	Pedal	Color	Blue
Type	sector

A/D Conversion	24-bit with AF (Adaptive Focus) method	Outputs	6.35mm Jacks
D/A Conversion	32-bit	THRU	6.35mm Jack output
Sampling Frequency	48 kHz	CTL1/2 or EXP2	6.35mm TRS Jack input
Transposition Range	+/- 4 octaves (pedal) / 8 octaves (fixed)	USB	USB-C
Detune Function	+/- 50 cents	MIDI	mini TRS connectors (in/out)
Memories	30 slots	Power Supply	DC IN jack
Bypass	buffered bypass	Dimensions	147 (W) x 230 (D) x 72 (H) mm
EXP1 Pedal	pitch control over 4 octaves	Max Height	96 mm
Integrated Toe Switch	momentary pitch trigger	Weight	1.7 kg
EFFECT and TUNE DOWN Switches	quick access to functions	Power adapter	included
SELECT, EFFECT, and MEMORY Buttons	navigation and saving	Rubber feet	4 rubber pads
Display	backlit graphic LCD (64 x 32 pixels)	Documentation	included
Input	6.35mm Jack