From Walrus Audio;

The

ARP-87 is a compact, feature-rich delay, packed with a large pallet of

inspirational delay tones. Featuring four main algorithms, digital,

analog, lo-fi, and slap back, the ARP-87 can cover some serious ground

in the world of echoes. The Digital algorithm boasts pristine, crystal

clear repeats great for rhythmic riffs. The Analog setting works well to

add warmth and dimension to chords and lines without getting in the

way. The Lo-Fi algorithm, with its adjustable frequency range on the

repeats, goes from warm, warped, and murky, to strait AM radio. Finally,

the Slap setting makes it easy to dial in a great slap back echo

perfect for smoking chicken pickin runs. With other features like our

smart bypass switching, and momentary knob ramp, the ARP-87 provides

endless creative opportunities that are waiting to be explored.

The

X knob changes functions depending on which Algorithm you are using. It

adjusts a specific parameter in each algorithm. In Digital, Analog, and

Slap modes, the knob will control modulation depth. In Lo-fi mode, the

knob will control Filter width.

Note

that when changing delay types this loads a whole new algorithm and the

tempo must be tapped in again. Max delay time is 1000ms.

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.