The Walrus Audio ARP-87 is your one-stop shop for all things delay—compact, powerful, and packed with tone-shaping versatility. With four distinct algorithms—Digital, Analog, Lo-Fi, and Slap—the ARP-87 lets you dial in everything from clean, rhythmic repeats to warbly, vintage-style textures. Whether you're after pristine clarity, warm ambiance, gritty nostalgia, or snappy slapback, this pedal delivers in style.

Each mode unlocks unique character, while the X knob provides extra tweakability—modulation depth for most modes and filter width in Lo-Fi for that AM-radio vibe. Add in onboard tap tempo, momentary ramping, and smart bypass switching, and you’ve got a delay that’s as creative as it is convenient. From subtle ambience to spacey trails, the ARP-87 is ready to spark inspiration.

Trails Mode

The ARP-87 can be run in trails or no trails mode. In trails mode, when you turn the pedal off, the delay trails die off naturally. In no trails mode, the delay trails are abruptly cut off when you turn the pedal off. To toggle between either mode, hold down the bypass switch for 1 second while applying power to the pedal. Unplug power and repeat to toggle to the other mode.

Momentary Functions

When the switch is in off position, press and hold the Bypass Switch to temporarily activate the effect to add a moment of delay texture. Releasing the switch turns the effect off. When the effect is on, press and hold the bypass switch to momentarily ramp the X parameter to maximum. Releasing the switch sets the X parameter back to the knob location.

Press and hold the Tap Switch to temporarily ramp the feedback to maximum. Release to set the feedback back to the knob location.

Features 

• Four versatile delay modes: Digital, Analog, Lo-Fi, and Slapback
• X knob provides mode-specific control: modulation depth or filter width
• Smart bypass switching with trails or true bypass modes
• Momentary knob ramping for expressive delay sweeps
• Tap tempo with max delay time up to 1000ms
• Compact enclosure with intuitive control layout
• Ideal for subtle repeats, ambient textures, or vintage-style echoes
• Internally runs at 9V for pedalboard compatibility
• Built with high-quality components for reliable performance
• Made in the USA with creative players in mind

Specifications 

• Buffered Bypass
• The ARP-87 comes in a Frosted Charcoal finish with cream and seafoam ink featuring original artwork by Chris Castro of a lone ship traveling through the ARP-87 Galaxies.
• The diecast enclosure’s exact size is 4.77" x 2.6" x 1.39".
• Power requirements are 9VDC (100mA minimum).
• The use of an isolated power supply is recommended for powering all Walrus Audio Pedals.
• Daisy chain power supplies are not recommended. Power supply not included.