User Guide for Walrus Audio Lüm Texture Engine Delay and Reverb Pedal

Quick guide from the manual

The Walrus Audio Lüm is a limited edition texture engine combining granular and reverb effects. To ensure proper operation, use only a 9V DC, center-negative power supply rated at 100mA or more. The use of an isolated power supply is highly recommended; daisy chain power supplies are not recommended as they may introduce noise.

Controls

The pedal features five main knobs to shape your sound:

• Decay: Controls decay on time-related parameters. Functionality changes based on the selected mode: feedback of the sampled delay line (Mode I), decay of the sampled reverb tank (Mode II), or decay of the forward algorithm reverb tank (Mode III).
• Filter: Adjusts the cutoff of a global synth-style low-pass filter.
• Mix: Controls the balance between wet and dry signals. Counterclockwise is more dry, clockwise is more wet.
• X: Controls grain size in Modes I and II, and reverse reverb feedback in Mode III.
• Stretch: Adjusts the global sample rate from 0.5x to 2x speed, affecting all time-based parameters.

Modes

Use the Mode toggle switch to select between three distinct programs:

• Mode I: A grain cloud with dual granular taps reading from a feedback delay line.
• Mode II: A grain verb with dual granular taps reading from the delay memory of a reverb algorithm tank.
• Mode III: A forward reverb algorithm running into a reverse reverb algorithm, creating rhythmic interactions.

Operation

The pedal utilizes two stomp switches:

• Bypass: Press once to activate or bypass the effect. Hold while the pedal is active to edit the moment effect target.
• Moment: Hold to activate an automation glide effect on one of the five knobs, moving from its current setting to a defined target.

To assign which knob is controlled by the Moment switch, hold Bypass while the pedal is active (the Bypass LED will blink), then turn the desired knob to set the target. Adjusting the Mode toggle while Bypass is held down changes the automation glide time between 10ms, 1000ms, and 5000ms.

Presets

The Lüm features three onboard presets (Red, Green, and Blue). Scroll through presets by pressing both stomp switches simultaneously.

To save a preset:

1. Scroll to the preset color you wish to save.
2. Adjust knobs and switches to dial in the desired sound. The preset LED will turn purple, indicating modification.
3. Hold down both Bypass and Moment stomp switches until the preset LED blinks. The preset is now saved.

Factory Reset: Hold down both foot switches while plugging in power to the pedal. Continue holding until the Preset LED starts to flash, then release both switches. The pedal will reset to Trails mode with default presets.

Specifications

• Bypass: Buffered Bypass
• Input/Output: 1 x 1/4 inch TS
• Input Impedance: 1M Ohms
• Output Impedance: 100 Ohms
• Power Requirement: 9V DC, center-negative, 100mA minimum