ALABS Audio CETUS Reverb Effects Pedal Instruction Manual
- June 17, 2024
- ALABS Audio
Table of Contents
ADAM ADVENTURES SERIES
CETUS REVERB EFFECTS PEDAL
CETUS Reverb Effects Pedal
Thank you for selecting the CETUS REVERB from ALABS Audio. This exceptionally versatile digital effects pedal, powered by our exclusive Wizard Audio Virtual Engine, offers nine captivating reverb modes, meticulously crafted for impeccable precision. The CETUS REVERB provides features that facilitate meticulous sound shaping, including analog dry-through and two versatile bypass modes. The footswitch also controls the infinite sustain and the unique Explore mode exclusive to this series.
OVERVIEW
- 9 high-quality effects: Include hall, room, church, spring, plate, swell, shimmer, cloudy, wave.
- Adjustable modulation options: All reverb types can achieve adjustable modulation effects.
- Advanced Audio Algorithm Engine: Powered by ALABS’ Wizard Audio Virtual Engine, utilizing high-precision dynamic forward virtual circuit modeling technology, running on a high-performance 32-bit floating-point digital signal processor (DSP).
- True stereo operation mode: Uses true stereo generation algorithms to achieve a spacious sound field for the reverb.
- Analog dry-through: Features a controllable independent analog dry-through buffer amplification circuit, preserving the unaffected, zero-latency, pure dry signal without AD / DA conversion.
- Selectable Bypass Modes: Provides high-quality relay-based true bypass and transparent analog buffer bypass options for selection.
- FREEZE function: Easily freezes the reverb tails by pressing and holding the footswitch, creating infinite sustain effects.
- Creative Explore Mode: Achieve dynamic variations and complex creative effects by simply holding down the footswitch to unleash multiple parameter transformations.
KNOBS and SWITCHES
DECAY
Adjusts the length of the reverberation trail’s decay. Go from only the early
reflection at minimum, to long late reverberation with large space size.
BRIGHT
Adjusts the BRIGHT of the reverb decay, with the darken BRIGHT at minimum
and brighten BRIGHT at maximum.
MIX
Controls the volume balance between the dry and wet signals.
The dry signal is the analog dry through signal, while the wet signal is the
reverb signal generated by DSP.
- When rotated clockwise before the 2 o’clock position, the volume of the dry signal remains unchanged, and the volume of the wet signal gradually increases.
- After the 2 o’clock position, the volume of the dry signal gradually decreases to 0, while the volume of the wet signal remains unchanged.
TYPE
Selects between nine reverb types. Refer to IV EFFECTS TYPE for more details
on each type.
Pre-DELAY
Controls the length of the delay before the reverb signal appears.
It ranges from a minimum value of 0 (no delay) to a maximum value of 100ms.
MOD
Controls the modulation depth and speed of the reverb tail.
When set to the minimum value, modulation is turned off. As you rotate the
knob clockwise, the reverb tail becomes more lively, with dynamic changes in
texture becoming more pronounced and exaggerated. Different reverb types may
also control other specific parameters. See IV EFFECTS TYPE for more details.
SWITCH
Determines the target parameter controlled by the left knob and the function
triggered by long-pressing the footswitch.
- When set to , the knob controls the Pre-DELAY parameter (The Pre-DELAY parameter still maintains the value stored by the system last time, unless the knob is turned), and trigger a system storage of MOD parameter. Now the long-press function of the footswitch is the function (see FUNCTION below for details).
- When set to , the knob controls the MOD parameter (The MOD parameter still maintains the value stored by the system last time, unless the knob is turned), and trigger a system storage of Pre-DELAY parameter. Now the long-press function of the footswitch is the function (see FUNCTION below for details).
FOOTSWITCH
The footswitch toggles the effect on or off.
- When the white LED is lit, it indicates that the effect is engaged. When the effect is bypassed, there are two modes: true bypass and analog buffer bypass (trail on). See BYPASS MODE for more details.
- When the footswitch is long-pressed, it activates either the or function, depending on whether the switch is set to the or position. Refer to FUNCTION and FUNCTION for specific details on each function.
REAR PANEL I/O
9V DC
Connect to 9VDC, center negative power supply, 250mA minimum.
Note: If the power supply is insufficient, it may cause malfunction.
IN L)mono）
1/4″ mono(TS)unbalanced left input for mono setup.
IN R
1/4″ mono (TS) unbalanced right input for stereo setup.
OUT L(mono）
1/4″ mono(TS)unbalanced left output for mono setup.
OUT R
1/4″ mono (TS) unbalanced right output for stereo setup.
When using a mono input signal, please note the following:
- If the input interface is connected to IN L, both OUT L and OUT R will output the analog dry signal (direct signal) from IN L and the wet signal from the effect.
- If the input interface is connected to IN R, OUT R will output the analog dry signal and the wet signal from IN R, while OUT L will only output the wet signal from IN R. Since it is in STEREO mode even though the IN L (MONO) port is not connected, the analog dry signal from IN L will be output from OUT L, and the analog dry signal from IN R will be output from OUT R.
EFFECTS TYPE
HALL
A high-quality reverb based on a medium-sized music hall. With different
parameter settings, it can achieve the effect from hall reverb to large
concert hall or even surreal twisted spaces.
ROOM
A reverb based on a medium-sized exhibition hall. Compared to hall reverb,
room reverb has a more subdued decay tail due to wall absorption, with fewer
dynamic variations in texture. With different parameter settings, it can
simulate environments ranging from a living room or recording studio to a
large exhibition hall or even strange cave-like effects.
CHURCH
A reverb based on a large cathedral wrapped in stained glass, offering a
larger space and more majestic tone than hall reverb. It creates a sense of
sacred and ceremonial atmosphere. With different parameter settings, it can
recreate soundscapes ranging from intimate wooden confession booths to grand
Gothic cathedrals.
SPRING
Based on virtual physical modeling technology, this reverb utilizes three
virtual springs combined with the amplification circuit and characteristics of
traditional spring tanks. The MOD parameter not only controls the intensity of
the reverb tail modulation but also adjusts the amount of gain driving the
springs, known as DWELL. When rotated clockwise, the spring reverb sound
becomes brighter and more pronounced. If you are a fan of vintage spring tank
sounds in guitar amplifiers, try dialing down these parameters. Conversely, if
you are an enthusiastic surf lover, feel free to turn them up.
PLATE
Inspired by the famous EMT 140 plate reverb, this reverb type exhibits quick
attack and high-density texture characteristics. With different parameter
settings, it can produce reverbs ranging from smooth and dense diffusion to
gentle undulating decay tails, from traditional vintage plate reverbs to
exaggerated expansive spaces.
SWELL
This effect creates a soft and dreamy atmospheric pad. The reverb loses its
distinct attack and gradually swells over time. Increasing the MOD parameter
not only adds more texture and fluctuation to the reverb tail but also extends
the swelling duration. Setting DECAY to the minimum and MIX to the maximum can
also be used as a volume swell effect.
SHIMMER
It’s not just about adding octave harmonies; we have implemented multiple
algorithms to create a dreamy soundscape. By adjusting the MOD parameter in
real-time, you can achieve scenes ranging from smooth and gorgeous, at times
resembling a symphony orchestra, and other times turning into a choir singing.
After increasing the MOD parameter, the beautiful
dream can instantly turn into a nightmare.
Note: If the high-frequency content of the reverb becomes harsh due to
equipment characteristics, try reducing the BRIGHT parameter.
CLOUDY
We have attempted to create a floating sensation in the clouds.
Through different parameter settings, it can evoke a serene and carefree
feeling in the blue sky with white clouds or a sense of being overwhelmed by
stormy clouds.
WAVE
We have discovered a sound that can depict the ocean. The ocean is gentle and
embracing. By reducing the MOD parameter and playing some dominant seventh
chords, you will hear the sea breeze rustling and small waves rolling in.
However, the ocean can also be ruthless and fierce. By increasing the MOD
parameter and striking the strings forcefully, you will hear the roaring of
the sea and the onslaught of giant waves.
Note: Different speaker systems have varying frequency responses. To
achieve a less piercing “sound of the waves,” try reducing the BRIGHT
parameter.
For all effect types, the MOD parameter will control the depth of modulation;
but for some specific effects, other model parameters will be additionally
controlled:
| EFFECT TYPE | MOD |
|---|---|
| Spring | Modulation Depth, Spring Dwell |
| Swell | Modulation Depth, Swell Attack |
| Wave | Modulation Depth, Density |
FUNCTIONS
To engage the Freeze mode, set the toggle switch to the position while the effect is active. Press and hold the footswitch until the indicator light turns blue, indicating that you have entered Freeze mode. Release the footswitch to exit Freeze mode, and the indicator light will return to white.
- The decay of the reverb is frozen, and new input notes will not enter the reverb signal flow. The reverb tail will sustain indefinitely (infinite sustain) and produce pad-like sounds.
- If you want every new note to enter the reverb signal flow with infinite functionality, you can use the function by setting the DECAY parameter to its maximum value. Refer to the function instructions for more details.
FUNCTIONS
This function is similar to automated expression parameter control and can
memorize the variation curves of the DECAY / BRIGHT / MIX and MOD parameters
within a 5 second timeframe for playback. It allows you to create rich dynamic
modulation effects.
To activate mode
Set the toggle switch to the position while the effect is active.
Press and hold the footswitch until the indicator light turns purple.
To exit mode
Release the footswitch, and the indicator light will return to white.
All parameters will return to their current knob positions.
Memorization
While holding down the footswitch, the parameters that have been memorized
will vary according to the memorized curves.
Memorized curves shorter than 5 seconds will remain at their end positions
once they reach the end.
Memorization process
While holding down the footswitch, rotate any of the DECAY / BRIGHT / MIX /
MOD parameters.
The indicator light will start flashing purple, indicating that the changes to
that parameter are being recorded.
After five flashes (5 seconds), the memorization mode will be exited.
Releasing the footswitch within the 5 second period will also exit the
memorization mode. It can store up to four memory curves (DECAY / BRIGHT / MIX
/ MOD) and be recalled together. The memorized curves of different parameters
are aligned automatically and have no specific chronological order.
Overwriting
When setting new memorization for parameters that have already been memorized,
the new variation curves will overwrite the previous ones.
Clearing
While holding down the footswitch, set the toggle switch to the position to
clear all memorized curves.
BYPASS MODE / TRAIL MODE
We offer two bypass modes for users to choose from:
- Cut off the power supply, than press and hold the footswitch while powering up the pedal. Once the LED light flashes, release the footswitch , and enter the power-up system mode.
- When the switch is pointing up to , the LED flashes red, which means it is buffer bypass mode and trail on mode at this time; when the switch is pointing down to , the LED flashes green, which means it is True bypass mode and trail off mode at this time.
- Press the footswitch to exit the power-on system mode and start to work normally.
True Bypass with signal relay: Compared to traditional mechanical switch
circuits, the use of a signal relay effectively reduces pop and click noise.
Analog Buffer Bypass: By bypassing the AD / DA conversion, the analog dry-
through circuit preserves the advantages of a buffer circuit while retaining
more of the original signal characteristics, reducing quantization noise and
frequency response coloration.
SPECIFICATIONS
| Power | 9VDC, center negative, 250mA minimum |
|---|---|
| Input Impedance | 1 Meg Ohm |
| Output Impedance | 100 Ohm |
| Max Input Level | +6 dBu |
| Universal Bypass | electromechanical relay-base true |
bypass, and analog buffer bypass
Dimensions| 4.83” deep x 2.57” wide x 1.40” tall
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