You can assign mainly system parameters to each of the top panel footswitches, the expression pedal (EXP1), and the expression pedal or footswitch connected to the rear panel CTL 3, 4/EXP 2 jack.


  1. Press the [CTL/EXP] button.
  2. Touch <CONTROL FUNCTION>.
  3. Turn the [SELECT] knob to select the item that you want to set.
    Turning the knob will move the selected item vertically.
  4. Turn knobs [1]–[4] to edit the value of the item selected for each switch.
  • The footswitch and expression pedal functions must be specified for each memory; however, if you set “PREF (PREFERENCE)” to SYSTEM, all memories will use those functions in common.

The GX-100 lets you arrange multiple pedal effects in the effect chain like FOOT VOLUME, WAH, PEDAL BEND and so on. In CONTROL FUNCTION, the effect placed at the beginning of the chain (or at “A CH” in DIV/MIX) is enabled.


FUNC ([BANK á], [BANK à], [1]–[4] switches, EXP1 switch, CTL1–4, CUR NUM, MANUAL 1–4)

Value Explanation
OFF No assignment.
1

Selects memory number 1.

  • Can be selected only for switch [1]
2

Selects memory number 2.

  • Can be selected only for switch [2]
3

Selects memory number 3.

  • Can be selected only for switch [3]
4

Selects memory number 4.

  • Can be selected only for switch [4]
BANK á

Switches to the previous BANK number.

  • Cannot be selected for [BANK à], [1]–[4] switches, “CUR NUM” and “MANUAL 1”–“MANUAL 4”.
BANK à

 Switches to the next BANK number.

  • Cannot be selected for [BANK á], [1]–[4] switches, “CUR NUM” and “MANUAL 1”–“MANUAL 4”.
MEMORY -1

Switches to the previous memory number.

  • Cannot be selected for “CUR NUM”, “MANUAL 1”–“MANUAL 4”.
MEMORY +1

Switches to the next memory number.

  • Cannot be selected for “CUR NUM”, “MANUAL 1”–“MANUAL 4”.
BPM TAP Used for tap input of the MASTER BPM.
TUNER Switches the TUNER on and off.
MEMORY/MAN Switches between memory mode and manual mode.
TUNER/MAN Turns TUNER on/off when briefly pressed; turns MANUAL on/off when long-pressed.
MAN/TUNER Turns MANUAL on/off when briefly pressed; turns TUNER on/off when long-pressed.
AMP CTL 1 Switches the AMP CTL 1 on and off.
AMP CTL 2 Switches the AMP CTL 2 on and off.
WAH

Turn the WAH on/off. 

  •  This only displays when WAH is in the effect chain.
DIV CH.SEL Switches the DIVIDER channel select.
SEND/RETURN Switches the SEND/RETURN on and off.
LOOP CTL

Controls the looper.

For details on how to use this, refer to “Looper” in the “Reference Manual” (Web).
LOOPER STOP Stops the phrase.
LOOPER CLEAR Clears the phrase.
MIDI START Controls the Start/Stop of external MIDI devices (such as sequencers).


FUNC (EXP1 PEDAL, EXP 2)

Value Explanation
OFF No assignment.
FOOT VOL Foot volume will be assigned.
WAH

Assign the WAH.

  • This only displays when WAH is in the effect chain.
FV/WAH

Assigns the foot volume and the WAH effect.

  • This only displays when FV and WAH are in the effect chain.
FV+TUNER

Foot volume will be assigned.

TUNER is displayed if the pedal is returned all the way.

  • This only displays when FV is in the effect chain.
FV+TUNER/WAH

Assigns the foot volume and the WAH effect.

TUNER is displayed if the pedal is returned all the way when using foot volume.

  • This only displays when FV and WAH are in the effect chain.
MODE

Value Explanation
TOGGLE The setting is toggled On (maximum value) or Off (minimum value) with each press of the footswitch.
MOMENT The normal state is Off (minimum value), with the switch On (maximum value) only while the footswitch is depressed.
PREF

Value Explanation
MEMORY This lets you use different settings for each memory.
SYSTEM The same settings will be shared by all memories.