Illuminate your soundscape with the Walrus Audio Lüm, a premium granular reverb pedal designed to transform your guitar or synth into a dynamic ambient instrument. Combining three unique granular reverb modes inspired by Slö Reverb, Lore Reverse Reverb, and Fable Granular Generator, Lüm fractures your audio into tiny grains wrapped in lush reverberations, creating immersive, shifting textures.

Main Features

• Three Distinct Granular Reverb Modes

  • Mode I – Grain Cloud: Dual tap feedback delay line produces granular textures with adjustable grain size via the X knob. Ideal for glitchy, ethereal effects.
  • Mode II – Grain Verb: Granular reverb combining delay memory with a lush reverb tank to create dense, washed-out tones where grains fully immerse in reverb. Great before high-gain pedals.
  • Mode III – Forward / Reverse Verb: Rhythmic interplay between forward and reverse reverbs. Use the Stretch knob to control speed and X knob to adjust reverse reverb decay.

• Moment Control Automation
  Hold the Moment switch to smoothly automate any of the five controls, adding expressive real-time motion.

• Ramp Control
  Adjust automation glide times between 10 ms, 1000 ms, and 5000 ms by combining Bypass with Mode toggle.

• Stretch Engine
  Globally shift sample rate from 0.5x to 2x to stretch time, affecting grain size, reverb decay, and tone.

• Onboard Presets
  Save and recall up to three presets with seamless, fade-driven transitions for live performance flexibility.

• Bypass Modes
  Choose between Trails for natural decay or Instant Cut for immediate, rhythmic stops.

Specifications

• Controls: Grain Size (X knob), Stretch, Moment switch, Mode toggle, Bypass switch
• Presets: 3 onboard memory slots
• Connectivity: Standard ¼" input/output jacks
• Power: 9V DC
• Dimensions: Compact pedalboard-friendly design

Frequently Asked Questions ➤ What types of granular reverb modes does the Lüm offer?
Lüm features three modes: Grain Cloud (granular texture with glitch effects), Grain Verb (granular reverb with dense, washed-out tones), and Forward / Reverse Verb (a dynamic mix of forward and reverse reverbs).
➤ Can I automate the pedal’s parameters in real time?
Yes, the Moment Control allows you to hold a switch and glide any of the five knob settings to a new target for expressive automation during performance.
➤ How many presets can I save on the Lüm?
You can save and recall up to three presets onboard for easy access and smooth transitions between your favourite sounds.
➤ What is the benefit of the Stretch Engine?
The Stretch Engine lets you shift the sample rate between 0.5x and 2x to uniquely interact with grain size, reverb decay, and tonal character, creating time-stretching and pitch-shifting effects.
➤ How does the bypass mode affect sound decay?
You can select Trails mode for natural reverb decay or Instant Cut for abrupt, rhythmic stops, allowing flexible sound shaping during your performance.

Outside the UK?

Please note that shipping costs outside the UK are very approximate and can vary radically. Please contact us with your Country and Post/Zip Code for an accurate quote. Many thanks. Please also note if you are outside the UK we will not charge you tax on your purchase but you may be liable for import duty in your country.

Please also note that all our stock is sold for the UK market. If you are buying from outside the UK, please check that it is suitable for use in your country before purchase.