Calibrer la pedale d'expression.

Citation : To start with, have the unit swithed off:
1) Hold down bank up button then swith on unit at same time.
your display will have changed at this point to a diferent menu.

2)You can now let go of the bank up button, now press
the AMP button.

3)push you expression pedal up from heel postion to toe position
and click until WAH light in ON.

4)Now push back the expression pedal to heel postion and you
will notice that on the menu on your display the mapped reading
will drop to zero or there abouts.

5) Now push the expression pedal up to the toe postion but DON`T
click the WAH swith. Now leave it there for 10 Secs for the
memory to remember it.

6) Now switch the unit OFF.

That should do it!!!