VOX Amplification StompLab IIG Manuel D'utilisation page 13

Ln: Use this setting if you've connected the StompLab to a line
input, to a headphones, to the power amp input of a guitar
amp, or to a recorder.
3. Set the master volume with the VALUE 2 knob.
Adjusting the sensitivity of the expression pedal
If the minimum and maximum values of the parameter are assigned
as the minimum and maximum values of the expression pedal,
but the effect or volume fails to reach the maximum (or minimum)
setting when the expression pedal is fully advanced (or returned),
you can adjust the sensitivity of the expression pedal as follows
so that it will function optimally.
When adjusting the sensitivity, you must use the expression
pedal with your foot; in some cases, it may not be possible to
adjust the pedal sensitivity if you use it with your hand.
1. Turn the power off.
2. While holding down the Expression pedal setting button and
 button, turn the power on.
3. When the program/value display indicates "Pd," release the
buttons.
4. Advance the expression pedal so that the effect switches on/off.
This will be assigned as the weight that will switch on/off the
effect assigned to the expression pedal.
5. Use your foot to slowly return the expression pedal toward
yourself, and take your foot off when the pedal stops.
6. Softly advance the expression pedal, and take your foot off
when the pedal stops.
If you decide to cancel this sensitivity adjustment, press
the  switch.
7. Press the  switch.
"CP" will appear on the program/value display and the mode
will automatically switch to the program select mode.
If the sensitivity adjustment could not be performed correctly,
the program/value display will blink "Er", and will then
indicate "Pd". In this case, perform the procedure from step 4.
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