Quick Start
Introduction
Thank you for choosing the Rilum Multi-head Delay by Klowra.
Rilum is a multi-head delay and modulation pedal inspired by classic multi-track tape echo machines. It delivers authentic vintage multi-head delay textures, lets you explore tape-like flanging and chorus tones born from analog friction, and creates warm, atmospheric trails with rich spatial depth. The sound evolves through layers of feedback, eventually reaching unpredictable self-oscillation.
The Ramp function allows tonal characteristics to evolve organically, while Tap tempo and the unique Twisted Tempo control keep your delay time tightly synchronized with your musical rhythm. With an expression pedal or external footswitch, you can instantly trigger expressive, dynamic variations.
Featuring Analog Dry-Through, selectable True Bypass/Buffered Bypass and multiple stereo modes, Klowra Rilum Multi-head Delay provides pure signal integrity and versatile performance support for any stage or studio setup.
Knobs and Switches
LAG TIME
Adjusts the delay time.
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Below 12 o’clock: Transitions from flanger into chorus tones.
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Above 12 o’clock: Ranges from slapback into long echoes (up to 1000 ms).
FEEDBACK
Adjusts the number of delay repetitions. Ranges from a single repeat at full counterclockwise to near-infinite oscillation at full clockwise.
MIX
Adjusts the mix between the dry and wet signals. At the minimum, it outputs full dry signal; at the maximum, it outputs full wet signal with no dry signal. A 50/50 mix occurs around 2 o’clock on the knob.
RATE
Adjusts the modulation speed of the delayed signal. Turning clockwise increases the speed and produces more rapid fluctuations.
HEADS VOL
Adjusts the output level of the other heads.
Note: The Main Head remains active at all times and cannot be muted via this knob.
LO-FI
Adjusts saturation and texture of the delayed signal. Turning clockwise adds stronger degradation for a vintage character and increases the sensitivity for self-oscillation.
Footswitch
Controls effect ON/OFF. Press & hold to trigger Tap Tempo/Twisted Tempo or Ramp.
Refer to the *Tap Tempo/Twisted Tempo* or *Ramp* section for details.
The LED Button
Lit when active, press & hold this button while turning other knobs to adjust various functions and hidden parameters.
Hidden Parameters
*To adjust the hidden parameters, press & hold the LED Button while turning the knob. A successful adjustment is indicated by the LED blinking yellow.*
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Spawn
Controls random volume changes between the main and other heads. Turn clockwise to add life and character to the FEEDBACK.
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RampATK
Controls the attack time of the Ramp modulation, determining how quickly the fade reaches the Snap-Set. A shorter attack time results in a quicker transition to the Snap-Set, while a longer attack time creates a smoother, more gradual fade.
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RampRLS
Controls the release time of the Ramp modulation, determining how gradually the transition fades back to the Panel-Set. A shorter release time results in a quicker return to the Panel-Set, while a longer release time provides a more drawn-out, fluid return to the Panel-Set.
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Depth
Controls the intensity of the modulation applied to the delayed signal. Turn clockwise for deeper, more dramatic sweeping effects.
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Groove
Linearly blends the volume of the other heads to allow for smooth rhythmic transitions. Specific subdivisions are isolated at the following positions:
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Fully Counterclockwise: Dotted-eighth head.
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12 o’clock: Straight-eighth head.
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Fully Clockwise: Quarter-note triplet head.
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Sum-Inv
Selects the phase relationship of the other heads to tailor tonality and low-end response.
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Sum (Turn fully counterclockwise): The other heads are summed in phase with the main head.
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Invert (Turn fully clockwise): The other heads are summed out of phase with the main head.
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For adjustments to hidden parameters, please refer to the *Description of the LED Button* section.
Rear Panel I/O
9V DC
Connect to a 9V DC power supply with a center-negative polarity and a minimum current rating of 250mA.
Note: If the power supply is insufficient, the pedal may malfunction.
IN L (Mono)
1/4" mono (TS) unbalanced left input for mono setups.
IN R (Stereo)
1/4" mono (TS) unbalanced right input for mono setups.
OUT L (Mono)
1/4" mono (TS) unbalanced left output for mono setups.
OUT R (Stereo)
1/4" mono (TS) unbalanced right output for stereo setups.
CTRL
1/4" stereo (TRS) balanced input for connecting an expression pedal or external footswitch.
Note: Please refer to the *External Control* section for information on how connection is recognized.
Signal Path
Configuring the In/Out Settings
1-in, 1-out
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Mono input with mono output. The dry and wet signals are mixed together in the mono output.
1-in, 2-out
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For the IN L, the pedal processes the mono input and creates a stereo soundstage across both outputs.
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Dry/Wet Separation stereo output : For the IN R, OUT R outputs the dry signal only; OUT L outputs the wet signal only.
*About Dry/Wet Split: This configuration splits your guitar signal into two distinct paths: one carrying the unaffected (dry) sound, and the other carrying the processed (wet) signal. This is particularly useful for parallel mixing in studio setups or advanced live signal routing.*
In full stereo operation, the dry and wet signals are processed and mixed independently for the left and right channels.
Description of the LED Button
The LED Button is the heart of the Rilum.
You can determine the current operating status of the Rilum by observing the color of the LED button. The LED button can be pressed briefly or in combination with other knobs to adjust various functions or parameters.
Learning to interpret the LED colors and understanding the different ways the button can be pressed are essential for familiarizing yourself with the Rilum’s operation.
What the LED Colors Mean
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White : Tap tempo/Twisted Tempo function active;
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Blue : Tap tempo/Twisted Tempo is actively being triggered.
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Orange : Ramp function active;
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Violet : Ramp is actively being triggered.
What the Button Can Adjust
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Toggle the Tap Tempo/Twisted Tempo or Ramp
Press once to switch between Tap Tempo/Twisted Tempo and Ramp.
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Save Snap-Set
Press & Hold to save the current parameter settings as Snap-Set.
The LED blinks violet to confirm.
Press & Hold while rotating the knob above the hidden parameters.
Successful adjustment is indicated by the LED blinking yellow.
Tap Tempo/Twisted Tempo
* In Power-Up Mode, select Tap Tempo or Twisted Tempo (factory default: Tap Tempo).*
Press & hold the footswitch while the LED is white. The LED turns blue to indicate the selected Tap Tempo or Twisted Tempo is active.
Tap Tempo
With the LED blue, tap the footswitch repeatedly at your desired tempo. Each tap updates LAG TIME to match the BPM. The LED will blink in time with the detected BPM. After 5 seconds of inactivity, the LED returns to white and the pedal exits Tap Tempo automatically.
Twisted Tempo
Hold the footswitch to engage Twisted Tempo. The effect starts immediately and modulates LAG TIME for a tape-scrubbing sound.
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RATE sets the modulation speed.
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LAG TIME sets the modulation depth (sweeping between the current value and 0)
Release the footswitch to exit Twisted Tempo, the LED returns to white.
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For subtle movement, keep RATE low and use a small LAG TIME setting.
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For extreme warble, increase RATE and LAG TIME.
External Control Tips
With an external dual footswitch connected, you can combine Twisted Tempo and RAMP for more expressive textures. Use Twisted Tempo for instant twisting or warbling motion and use RAMP to sweep the RATE or LAG TIME between two settings, creating dynamic back-and-forth transitions.
*Press & hold the footswitch while the LED is orange. When the LED turns violet, you’ve entered Ramp. *
Ramp allows for smooth, dynamic transitions between two sets of parameters:
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Panel-Set – Your current front-panel parameter settings.
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Snap-Set – A saved set of parameters stored using the LED Button.
This feature creates expressive, evolving fades that add depth, movement, and
emotion to your sound. The speed and character of the transition are defined by
two parameters:
RampATK (Attack Time):
Controls how quickly the effect fades from the Panel-Set to the Snap-Set.
- A shorter attack gives a fast, sharp transition.
- A longer attack creates a smoother, more gradual fade.
RampRLS (Release Time):
Controls how quickly the sound returns from the Snap-Set to the Panel-Set.
- A shorter release results in a quick recovery.
- A longer release provides a more drawn-out, fluid return.
Ramp Modes
Ramp supports two switching modes - Momentary and Latched—giving you
flexibility to match your performance style.
Momentary Mode:
Press & hold the footswitch to fade into the Snap-Set over RampATK time. Release
the footswitch to return to the Panel-Set over RampRLS time.
Latched Mode:
Press once to transition to the Snap-Set (RampATK), and press again to return to
the Panel-Set (RampRLS).
To select between Momentary and Latched modes, see the * Power-Up Modes* section.
Power-Up Modes
How To enter Power-Up Modes:
Press & hold the footswitch while powering on the pedal. A flashing LED indicates successful entry. Once your settings are configured, press the footswitch again to exit Power-Up Modes.
In this mode, you can adjust the following settings:
Bypass & Trails Modes
Switch between modes by short-press the LED button.
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True Bypass
The signal is routed directly through the pedal with no buffering or coloration.
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Green LED flashes to indicate True Bypass mode.
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Buffered Bypass(Trails on)
The signal is routed through a buffer with Analog Dry-Through, allowing delay trails to continue after the effect is bypassed.
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LED Red flashes to indicate Buffered Bypass mode.
Tap Tempo and Twisted Tempo Switching
Select by rotating the LAG TIME knob.
- Turn fully left for Tap Tempo (LED yellow flashes 3x).
- Turn fully right for Twisted Tempo (LED blue flashes 3x).
Ramp Lock
Select by rotating the FEEDBACK knob.
- Turn fully left for Momentary (LED flashes yellow 3x).
- Turn fully right for Latched ( LED flashes blue 3x).
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Momentary:
Hold the footswitch to transition to Snap-Set over RampATK time. Release to return to the current set over RampRLS time.
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Latched:
The first press transitions to Snap-Set over RampATK time. The second press returns to the current set over RampRLS time.
LED Brightness
Adjust by rotating the LO-FI knob.
- Turn fully left for dimmest.
- Turn fully right for brightest.
Connection & Activation
When connecting an external TS/TRS footswitch or expression pedal, the LED indicator will flash red. Trigger the footswitch or pedal repeatedly during this state.
Once the connection is successfully recognized, the Rilum will return to normal operation.
Note: If the External Control is not fully activated, it may result in limited functionality.
External Footswitch Compatibility
When connecting an external TS/TRS footswitch, there are two specific functional settings, depending on the color of the LED indicator:
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LED White - The current footswitch-specific function is Tap Tempo/Twisted Tempo.
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TS Footswitch : Momentary triggers Ramp.
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TRS Footswitch:
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Tip Position: Momentary triggers Ramp.
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Ring Position: Momentary triggers Tap Tempo/Twisted Tempo.
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LED Orange - The current footswitch-specific function is Ramp
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TS/RS Footswitch: Momentary triggers Tap Tempo/Twisted Tempo.
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TRS Footswitch:
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Tip Position: Momentary triggers Ramp.
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Ring Position: Momentary triggers Tap Tempo/Twisted Tempo.
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Expression Pedal Compatibility
When an expression pedal is connected, it takes direct control over the Ramp by blending between the Panel-Set and Snap-Set. In this mode:
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The Ramp ATK and Ramp RLS parameters are disabled.
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Ramp cannot be triggered by Press&Hold the footswitch.
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The expression pedal locks Rilum into LED White (Tap Tempo active), and mode switching to LED Orange (Ramp active) is disabled.
How do I update my Klowra pedal?
1/ Download the latest firmware update file for your model from the relevant model page.
2/ Connect the Klowra pedal to your computer using the USB-C data cable.
3/ Hold down footswitch&the LED button while powering on, the LED flashing red.
4/ Open the firmware update file. Please avoid opening multiple installers at the same time, as this may cause detection issues. Click Update to begin installing the firmware.
5/ After the successful update, the LED turns off. Restart the pedal and enjoy!
STILL UNABLE TO CONNECT KLOWRA PEDAL?
If reconnecting the pedal or restarting the software doesn't help, check the following:
1. Verify that the USB data cable is securely connected to both the pedal and your computer, and try using a different USB port if necessary.
2. Replace the USB data cable with a known-good one and attempt to reconnect the pedal.
IF THE PROBLEM CONTINUES, PLEASE FOLLOW THESE STEPS:
1. Close the update software, and then follow the steps below in order.
2. Connect your klowra pedal to your computer with a USB data cable (not included).
3. Relaunch the update software.
4. Power on the pedal while holding both the footswitch and the LED button.
5. The LED button wil flash red. Wait a moment, then click "Update" to begin the firmware process.
Inputs | 2 x 1/4"TS Instrument jacks |
Input Impedance | 500k Ohm |
A/D & D/A | 24 Bit 44.1K Hz |
Power Source | 9V DC power supply required |
External Control | TS/TRS Momentary footswitch, or TRS expression pedal |
Hardware Interface | USB-C |
Outputs | 2 x 1/4"TS Instrument jacks |
Output Impedance | 100 Ohm |
Max Input Level | +10 dBu |
Current Draw | 250mA |
Bypass Mode | Switchable: True Bypass, Buffered Bypass(AnalogDry-Through) |
Dimensions | 54.7mm H x 124.8mm D x 69.2mm W(2.0"H x 4.9"D x 2.7"W) |