Walrus Audio releases limited edition Lüm granular reverb

September 16, 2025 · 3 sources

Walrus Audio released the Lüm, a mono granular and textural reverb pedal, on September 16, 2025, drawing on elements of its Fable, Lore and Slö/Slötvå pedals¹²³. It is a limited edition of 600 units worldwide¹²³.

The pedal has three modes. Mode I, Grain Cloud, is described as a grain cloud with dual granular taps reading from a feedback delay line. Mode II, Grain Verb, uses dual granular taps reading from the delay memory of a reverb algorithm tank. Mode III, Forward Reverse Verb, runs a forward reverb algorithm into a reverse reverb algorithm¹³. The X knob controls grain size and glitch frequency in the first two modes and the reverse reverb decay in the third¹³. The Stretch knob adjusts the global sample rate from 0.5x to 2x, affecting grain size, reverb decay and filter tone³.

Controls are Decay, Filter, Mix and X, with a three-way mode switch¹². The Moment footswitch automates parameters between two settings, with glide times of 10 ms, 1000 ms or 5000 ms¹². Both footswitches pressed together scroll through three onboard presets¹. Trails and instantaneous bypass modes are included³.

Guitar Pedal X reported that only 600 were offered through the Walrus Audio Store for $279¹. Gearnews gave the price as $293 at Thomann and also stated the run was limited to 600 units worldwide². The two sources disagree on the US price.