In recent years, Walrus Audio has released several pedals based on a common theme: pitch-shifted digital reverb. In that regard, Slö is a successor to Walrus’s Descent Reverb/Octave Machine and Fathom Multi-Function Reverb.
Slö includes three unconventional reverb algorithms and the tools to morph them in a generous assortment of ambient effects. Dark mode pitch-shifts your signal down an octave before feeding it through reverb. Dream mode permits “latching” the reverb for sustained freeze effects. Rise is an auto-swell mode that delays note attack in the manner of the old Boss SG-1 Slow Gear pedal before routing it through reverb. Since this mode slows the attack of the wet signal, it can mimic the SG-1 sound (and lots of luck finding a used SG-1 for less than Slö’s list price).