H9 User Guide
HOTKNOB & Expression Pedal
25
Expression Pedal
An external Expression Pedal can be connected to the rear panel ¼” stereo phone jack labeled
“EXP”. The Expression Pedal can be set up to control any combination of parameters. For
proper operation the Expression Pedal should be a simple linear taper resistive potentiometer
(“pot”) with a maximum value of between 5k Ohms and 25k Ohms. Refer to
www.eventide.com for information on recommended expression pedals.
The H9 will auto-calibrate your Expression Pedal. To calibrate, plug the Expression Pedal into
the EXP jack and rock the pedal from full-heel to full-toe. This calibration can be “frozen” by
setting UTILITY/PDLCAL to OFF.
The Expression Pedal behaves identically to the HOTKNOB. They work in ‘parallel.’ The
Expression Pedal’s action is set by patching the HOTKNOB. When using the Expression Pedal
the display works in the same way as if you were turning the Knob in HOTKNOB mode. If a
single parameter is assigned its value is displayed when the Expression Pedal is moved. If the
Expression Pedal has been set up to control multiple parameters, the display is simply a range
from 0-99. To indicate which X, Y, Z parameters are controlled by the Expression Pedal, Press
and Hold HOTKNOB and an X, Y, or Z button and turn the Knob.
The HOTKNOB/Expression Pedal settings are not saved automatically. If you want to be able
to recall your settings, you must perform the Preset Save operation.
Note: The Expression Pedal input supports control voltage inputs from 0V to 3V. Care must
be taken to avoid ground loops when using this input with external control voltages. If you
hear a “hum” only when you’ve connected a control voltage source to the H9’s Expression
Pedal input jack, then it is likely that the device generating the control voltage is grounded to
a different ground than your audio inputs and outputs. Ground loops are notoriously difficult
to track down and beyond the scope of this User Guide to diagnose.
The Expression pedal can also be used to control input and output level, either on all presets
(GLOBAL) or on a preset by preset basis. See Input and Output Swell for more details.
Summary of Contents for H9
Page 1: ...H9 Harmonizer User Guide ...