The magic X knob

The Walrus Audio ARP-87 is spec'd with an innovative X knob that changes functionality depending on which algorithm you choose. Programmed to adjust a specific parameter in each algorithm, the X knob controls modulation depth in Digital, Analog, and Slap modes, and filter width in Lo-Fi mode. 

Got trails?

You can run the ARP-87 in trails or no-trails mode. Set to trails mode, the delay trails trail off naturally when you switch the pedal off. In no-trails mode, the delay trails are unceremoniously cut off when you switch off the ARP-87. Holding down the bypass switch for one second while applying power to the pedal toggles between the two modes.

Momentary functions

With the ARP-87's bypass switch in the off position, pressing and holding it temporarily activates the effect to add a momentary delay to your signal. When you release the switch, the effect turns off. While the effect is on, press and hold the bypass switch to momentarily ramp the X parameter to its maximum. Releasing the switch sets the X parameter back to the knob position setting. To temporarily ramp the feedback to maximum, press and hold the Tap switch; releasing it sets the feedback value to the knob position setting.

• Digital, Analog, Lo-Fi, and Slap settings
• Trails/No-trails modes
• X knob adjusts a specific parameter in each algorithm depending on algorithm setting
• Tap tempo
• Smart bypass switching
• Momentary knob ramp
• Robust, attractive die-cast enclosure with frosted charcoal finish and original artwork
• Power requirements: 9VDC (100mA minimum)
• Isolated power supply recommended (not included)
• Daisy-chain power supplies not recommended