Nabil,
Yes, if you go to the utility called Arabic, you will see on the screen the notes that you can change to be quartertone tuning. Using the highest octave on the X1, you can turn on and off the different notes you wish to be changed. If you look at the upper right hand corner of the display, there is a dialog box which is F5. If you tap the F5 button you can choose betweeen pedalboard, off or 5 tuning mode. By selecting PedalBoard on, you can tap on any of 12 keys and this will turn on and off that particular note you wish quarter tone tuned or if you press the pedal that would normally be between the note E and F (of course there is no note), this will bring whatever notes you have choosen, back to normal tuning. This might be a function added in version 3.0 or 3.1. I don't know. I've used it with both the middle eastern operating software and with regular version 3.1A software.
George Kaye
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George Kaye
Kaye's Music Scene (Closed after 51 years)
West Hills, California
(Retired 2021)