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footswitches.  The preset LEDs, above the Footswiches, indicate which preset is loaded. All 

of the slider settings except Input Gain are stored in memory.    

 

Loading a preset

:  First, move the Preset Bank slider to the appropriate bank (1-4).  

Then tap the footswitch corresponding to the desired preset, either Preset A or B.  The LED 

for that preset will light. 

 

Saving a preset

:  Once a memorable sound has been created, saving it in a user preset 

location is simple.  First choose a bank (1-4) to store the sound.  Then, press and hold 
down the footswitch denoting which of the presets to overwrite.  The corresponding preset 

LED will blink until the preset is saved, then the preset LED will light solid.  Releasing the 

footswitch before the blinking stops will abort the save operation. 

 

Preset fun facts

• 

After loading a preset, the Preset LED above the corresponding footswitch will 
light solid. If the bank slider is then moved to a different bank, the preset LED 
above the footswitch will go off. The Preset LED will light 

only

 when the Preset 

Bank slider is pointed to the bank that the current preset resides. 

• 

Changing into Free Mode from Preset Mode unloads the current preset and 
resets all parameter values to their slider positions. 

• 

Changing into Preset Mode from Free Mode does not immediately load a preset, 
it simply makes it possible to save the current settings or load a different preset. 

• 

You cannot Load or Save a Preset while in Free Mode. You must be in Preset 
Mode. 

• 

If a slider is moved after a preset is loaded, the value of the parameter will jump 
to the slider’s new setting. 

• 

If you load a preset while in Bypass Mode, it will not bring you out of Bypass. So 
you can load/save a preset while in Bypass. 

 

Factory Presets: 

 

The Holiest Grail comes pre-loaded with Factory Presets. Here is a brief description of each 

preset: 
 

Preset 1A

: Short Spring – A spring reverb with a short decay time. 

Preset 1B

: Long Spring – A spring reverb with a long decay time. 

Preset 2A:

 Short Hall – A clean reverb with a short decay. 

Preset 2B:

 Long Hall – A huge reverb with a very long decay. 

 

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Preset 3A:

 Short Room – A short decay reverb with a good amount of damping. 

Preset 3B:

 Long Room – A long decay reverb with some damping. 

Preset 4A:

  Echo  Verb  –  An  echo  effect  made  out  reverb.  The  Pre-Delay  Time  and 

Feedback are turned up but the reverb decay is turned down. 

Preset 4B:

 Resonator – With the Pre-Delay Feedback turned up to its maximum and the 

Pre-Delay Time nearly at zero, certain notes will cause the reverb to resonate. Try moving 

the Pre-Delay Time slider to accent different pitches. 

 

If at some point you decide that you would like to restore the factory presets, this is how 
you do it: 

Warning: This will erase all of the presets you have created! 

1.  With power disconnected from the Holiest Grail, press and hold down all three 

Footswitches simultaneously. 

2.  While holding the Footswitches, apply power to the Holiest Grail. 

3.  Keep holding the Footswitches down. After applying power, you will see the 

Preset A and Preset B LEDS blink for about 2 seconds. 

4.  After the LEDs have stopped blinking, release the Footswitches and power cycle 

the unit. The Holiest Grail will now have the factory presets loaded into memory. 

 

 

MIDI 

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Real Time Control 

The Holiest Grail can send and receive MIDI continuous controller messages, allowing 

external sequencers to record and automate parameters. The Holiest Grail sends and 

receives MIDI CC over 

Channel 1 only

Each slider (except Input Level) has an associated MIDI CC code: 
 

Pre-Delay Time     

MIDI CC #20 

Pre-Delay Feedback  

MIDI CC #21 

Reverb Decay  

 

MIDI CC #22 

Reverb Damping     

MIDI CC #23 

Reverb Diffusion    

MIDI CC #24 

Dry Output Level     

MIDI CC #25 

Spring Output Level  

MIDI CC #26 

Reverb Output Level   

MIDI CC #27 

Bank Selector  

 

MIDI CC #28 (CC is not saved and does not affect program load) 

Footpedal/CV Input    

MIDI CC #30 

Summary of Contents for HOLIEST GRAIL

Page 1: ...rformance and recording the box is able to store 8 user presets and can be remotely controlled via MIDI A standard expression footpedal can be used to control the amount of signal sent to the reverb a...

Page 2: ...imately 1 5 ms From 50 to 100 the time ranges from 100ms to 440ms in 5 ms increments FEEDBACK Slider Controls the amount of feedback that is re circulated in the pre delay before the reverb At its max...

Page 3: ...b signal PRESET Management PRESET FREE MODE Slide Switch When in Preset Mode programs can be saved and loaded When in Free Mode all preset capability is disabled and all parameters are derived from th...

Page 4: ...t accepts an Expression Pedal with a TRS connection or a Control Voltage Between 0 and 5V on TS connection The Exp Pedal Input controls the level of signal into the reverb useful for fades swells and...

Page 5: ...nk the preset LED above the footswitch will go off The Preset LED will light only when the Preset Bank slider is pointed to the bank that the current preset resides Changing into Free Mode from Preset...

Page 6: ...e holding the Footswitches apply power to the Holiest Grail 3 Keep holding the Footswitches down After applying power you will see the Preset A and Preset B LEDS blink for about 2 seconds 4 After the...

Page 7: ...Program Change messages to load any of the 8 presets The Holiest Grail receives MIDI Program Change on Channel 1 only Sending any of the following MIDI Messages to the Holiest Grail will load the cor...

Page 8: ...8...

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