Walrus Audio Fathom

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.