Check the listing for details. Mint Walrus Audio SLÖ Multi Texture Reverb Guitar Effects Pedal. Condition: Used. Listed at 184.79 USD. In the “Dream” algorithm, the sustain switch is latching. Press it again to let the reverb trail taper off, based on the position of the decay knob. The toggle switch allows three different reverb modes, Dark (Lower Octave), Rise (Ambient Swell) and Dream (Latching Pad), while secondary functions on the switch change between different wave shapes for the modulation on the reverb trail.