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The Holiest Grail is built around a high quality stereo reverb algorithm coupled with a
painstakingly developed simulation of spring reverb as found in guitar amps and dedicated
reverb tanks. The decay time, damping and diffusion parameters of the reverb can be
freely tweaked to design an infinite array of natural and unnatural sounding spaces. A
versatile pre-delay can be applied to the reverb, and a feedback control has been added to
the pre-delay to provide even greater sound-sculpting capabilities for spatial simulation
and/or experimentation.
As an aid to both live performance 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 performance tool that can help
personalize the sound.
WARNING: Use only the 9VDC/500mA AC adapter the Holiest Grail comes
supplied with. Do not use any other AC adapters. Using other AC adapters, even
those made by Electro-Harmonix, could cause harm to the unit, the adapter or you.
The Holiest Grail does not use batteries.
INPUT
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INPUT GAIN Slider – A control for setting optimal analog signal level into the A/D
Converter. The green LED lights when there is sufficient level. The red LED will light when
clipping occurs. The position of the INPUT GAIN Slider is not saved with the user
presets.
HOLIEST GRAIL
- DESCRIPTION -
- CONTROLS/INDICATORS -
1
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Summary of Contents for Electro-Harmonix HOLIEST GRAIL
- Page 1 HOLIEST GRAIL - DESCRIPTION - The Holiest Grail is built around a high quality stereo reverb algorithm coupled with a painstakingly developed simulation of spring reverb as found in guitar amps and dedicated reverb tanks. The decay time, damping and diffusion parameters of the reverb can be freely tweaked to design an infinite array of natural and unnatural sounding spaces.
- Page 2 Signal LED – Green LED above INPUT GAIN Slider. The Signal LED varies in brightness depending on the strength of the input signal. The louder the signal the brighter this LED will be. Clip LED – Red LED above INPUT GAIN Slider. The Clip LED lights when the signal clips the A/D Converter.
- Page 3 sound. At the lowest setting, the reverb has a grainier quality, while at the maximum setting the reverb is at its most lush. Output Mixer Controls DRY Output Level Slider – Controls the amount of dry signal sent to the outputs.
- Page 4 BYPASS Footswitch– Toggles between processed sound and True Bypass. When the Holiest Grail is in True Bypass mode, the Input Jack will be connected to the Main Output Jack so the Bypassed signal will exit through the Main Output Jack. There will be no output on the Stereo Output Jack when in True Bypass mode.
- Page 5 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.
- Page 6 Keep holding the Footswitches down. After applying power, you will see the Preset A and Preset B LEDS blink for about 2 seconds. 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 ------------------------------------------------------------------------------------------------------------...
- Page 7 CC messages. So you will receive 10 MIDI CC messages every time a preset is loaded. MIDI Program/Patch Change The Holiest Grail accepts MIDI 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...
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