Copy. Layer. Repeat. - The Walrus Audio Xero Polylooper Guitar Effects Pedal in Black

The Xero Polylooper (pronounced zee-roh) gives you the freedom to build, shape, and control your loops without slowing down your flow. Each channel handles multiple overdubs with independent volume, pan, speed (½×, 1×, 2×), and reverse playback. Three loop modes (Sync, Unsynced, and Polyrhythmic) let you tailor your looping style, whether you’re keeping things aligned, going freeform, or creating interlocking polyrhythms.

• Dual-channel looping – independent control of two layers
• Three loop modes
• Sync: Keep all loops in time. Traditional looping style
• Unsynced: Channels are independent, each with its own loop length. Great for soundscapes and ambient playing
• Polyrhythmic: Loops lock to a shared pulse but can be different lengths, allowing for polyrhythms or short loops repeating over longer ones
• Flexible playback – volume, pan, playback speed (½×, 1×, 2×), and reverse
• Hands-free control – intuitive stomp gestures, no menu diving
• Expandable – external dual footswitch, MIDI IN/THRU (1/8"), and USB-C firmware updates

Two stomp switches make it super easy to record, stop, switch channels, or clear a loop. No clunky menus or deep diving! Want quicker access? Just plug in an external dual footswitch. Xero also includes 1/8" MIDI IN and THRU for syncing with other gear, and USB-C making it future-proof. Available in black or cream.

Two Loop Channels, Fully Independent Control

• Loop up to 3 minutes with near infinite stacking of loops
• Unlimited overdubs
• Volume and Pan controls
• Playback speed (0.5x / 1x / 2x)
• Reverse playback option

Speed FX & Direction Controls

• Half / Normal / Double speed
• Reverse playback – Each channel’s playback behavior can be manipulated independently, letting you remix on the fly.
• FX activation syncs to loop start in Sync and Poly modes, ensuring accurate timing

Stereo. MIDI. USB. Ready to Integrate

• 1/8” MIDI IN/THRU (Type A) for clock sync and remote control
• USB-C for easy firmware updates via walrusaudio.io
• Stereo in/out with full panning control on each channel
• Compatible with Chrome on Mac or Windows for web-based updates

Breakdown of Control Layout

Channel 1

• Pan 1: Stereo balance for loop playback
• Vol 1: Channel output volume with +3dB of headroom
• Speed: 0.5x / 1x / 2x playback speed (when Speed FX is active)
• Direction: Forward or reverse loop playback

Channel 2

• Pan 2: Independent stereo placement
• Vol 2: Channel 2 volume with +3dB boost
• Speed: 0.5x / 1x / 2x playback
• Direction: Forward or reverse loop playback

MIDI Intergration

• Accepts 1/8” TRS MIDI IN (Type A)
• Sends MIDI THRU to downstream devices
• Supports full MIDI CC control for looping, playback, speed FX, and more

SPECIFICATIONS

• 9V DC, 300mA minimum
• Center Negative, 2.1mm center pin, 5.5mm barrel
• Enclosure dimensions: 4.6” x 3.9” x 2.3” (including jacks)
• Input Impedance: 1.1MΩ
• Output Impedance: 1kΩ
• Signal-to-Noise Ratio (Engaged): 86dB
• Signal-to-Noise Ratio (Bypassed): 110dB
• Noise Floor (Engaged): -93dBu
• Noise Floor (Bypassed): -116dBu
• Headroom (Engaged): 5.2Vpp / +7.5dBu @ 1kHz < 1% THD+N

Manufacturer: Walrus Audio
Model: 900-1097BK
SKU: I843659-N-1-WHXA

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