Using The Expression Pedal (Rtm Function) - Zoom GFX-4 Operation Manual

Using the Expression Pedal (RTM function)

The GFX-4 has an integrated expression pedal that can be used to adjust the volume or effect parameters in real time. This
function is called RTM (Real Time Modulation). This section explains how to make RTM settings and use the function.
1.
Select the patch for which you want to make
RTM settings, and press the PEDAL module key
in manual mode or program mode.
The PEDAL module display is shown. This module
serves for making expression pedal settings.
The RTM setting can be made in manual mode or
program mode. However, if the PEDAL module
key is pressed in program mode, the unit reverts
to the original condition if no control is operated
for 5 seconds.
2.
Use the pedal module key to bring up the
indication "EXPVOL" on the display.
This display lets you make settings for using the
expression pedal as a volume pedal and for selecting the
function of the assignable switch built into the expression
pedal.
3.
Use knobs 1 - 3 of FX panel 2 to set the
following parameters.
• Parameter Knob 1
• • • •
Determines whether the expression pedal is used as a
volume pedal in this patch. You can select "oF" (off) or
"on".
• Parameter Knob 2
• • • •
When the "on" setting is selected with knob 1, you can
set the minimum volume (the volume when the pedal is
fully raised) with this knob. The setting range is 0 - 9.
• Parameter Knob 3
• • • •
The expression pedal incorporates an assignable switch
(electronic switch that is toggled between on and off
when the pedal is fully depressed). This knob lets you
select the function of the switch from the following two
options.
0: Toggle RTM controlled module on/off status
1: Switch between program mode and manual mode
EXPVOL
MINVOL
EXP-SW
Depending on which knob is operated, the parameter
name appears on the display and the current setting is
shown on the GROUP/BANK indicator.
To use the expression pedal as volume pedal in
bypass mode, the stereo output of the GFX-4
must be used. If the mono output is used
(playback system connected only to the OUTPUT
MONO jack), the expression pedal does not
function as a volume pedal, regardless of the
EXPVOL parameter setting.
4.
Use the pedal module key to bring up the
indication "EP-DRV" on the display.
This display allows you to select the effect module to be
adjusted in real time with the pedal. RTM control is
possible for the DRIVE, MODULATION, and
DELAY/REVERB modules. (Several modules can be
selected.)
5.
Use knobs 1 - 2 on the FX panel 2 to set the
following parameters.
• Parameter Knob 1
• • • •
Determines whether to control the DRIVE module with
the expression pedal in real time. You can select "oF"
(off) or "on".
• Parameter Knob 2
• • • •
Determines whether to control the MODULATION
module with the expression pedal in real time. You can
select "oF" (off), "UP", "dn" (down), "Hi" (high), or
"Lo" (low).
When a setting other than "oF" is selected, operation is
as follows.
EP-DRV
EP-MOD
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ZOOM GFX-4