Updated May. 11, 2022

Walrus Audio Fathom

On the heels of the successful release of the Arp 87 Delay, Walrus Audio just unveiled the Fathom, a multi-function reverb + modulation built on the same form factor.

Featuring four modes (Hall, Plate, Lo-Fi and Sonar, which is a reverb with added octaves for that famous “shimmering” effect), this is a stompbox packed with features that can deliver both classic and edgy sounds. The top three knobs tackle decay length, reverb tone and mix, while the “X” knob control a different function for each mode.

Check out the manufacturer’s description at the bottom of the entry and the several video demos below.

We added the Walrus Audio Fathom to our article about the best multi-reverb pedals.

Walrus Audio Fathom Reverb, Builder’s Notes

The Fathom features 4 different algorithms.

Hall – Wide, open and vast with decay that ends with high-frequency rolloff. X knob adjusts pre-delay.

Plate – Full Body reverb with a smooth decay. X knob adjusts pre-delay.

Lo-fi – Filtered reverb with decay ranging from warm, to thin AM-sounding radio. X knob adjusts filter width.

Sonar –  Reverb fed with both a high and low octave with the ability to blend the octaves with the X knob.

Momentary Functions:

When the pedal is in off position, press and hold the Bypass Switch to temporarily activate the effect to add a moment of reverb. Releasing the switch turns the effect off.

Press and hold the Sustain Switch while the pedal is on, to sustain the reverb decay for a dreamy ambient decrescendo.

Trails Mode:

To turn trails mode on or off, unplug the pedal and press and hold down the Bypass Switch for two seconds while plugging the pedal back in.